MECHANICS EXAM NEIEP (2024/2025) QUESTIONS WITH VERIFIED CORRECT ANSWERS 100% GUARANTEED PASS

MECHANICS EXAM NEIEP (2024/2025) QUESTIONS WITH VERIFIED CORRECT ANSWERS 100% GUARANTEED PASS “** An MOV burns out, you replace it but cannot read voltage or resistance. What should you do? - CORRECT ANSWER Replace it with a larger one (630)" "* On a Ward-Leonard circuit, the brake is set but the motor is trying to slip through the brake. What circuit is the issue? - CORRECT ANSWER Suicide circuit (425)" "** How much resistance is normally measured across a normally closed switch ? - CORRECT ANSWER 1.2 ohms or 1 to 2 ohms" "** A car traveling in the hoistway always stops at the same point and blows a fuse. What is the problem? - CORRECT ANSWER Traveling cable has a cut or short" "** How is a Class 1 (yearly) buffer test performed? - CORRECT ANSWER At slow speed and the buffer must return in 90 seconds. (555) *(60 seconds is acceptable) (90 seconds is code) 5 year test (Class 5) is car at rated load and speed. Buffer must return in 90 seconds. CWT at rated speed and buffer must return in 90 seconds." "** A customer does not want an Escape Hatch on his residential elevator. Under what conditions is this legal? - CORRECT ANSWER Manual Operation must be provided (850)" "** You wired the Down Direction and Final Limit switches. Now the car only runs up. What is the problem? - CORRECT ANSWER You wired the Down Direction Limit wrong." "** What are the effects of one rope sitting deeper in the sheave groove? - CORRECT ANSWER The rope wears out and breaks faster (250)" "** There is a noise coming from a freight door. The sheave is moving but the chain is not. What is the problem? - CORRECT ANSWER Oil on on the chain" "** What is the effect when you change a sling angle from 60* to 30* when hoisting and rigging? - CORRECT ANSWER More tension, less capacity." "** How many points of contact must be maintained on a ladder? - CORRECT ANSWER 3 points at all time." "* What is the conversion formula when measuring Inch to MM? - CORRECT ANSWER 25.4 Inch to MM (.03937) 2.54 Inch to CM (.3937)" "** You open a Dumbwaiter access panel and it still runs. What is the cause? - CORRECT ANSWER Pit Access switch is not working. (550)" "** You perform a static load test with the pit valve in the closed position. The car sinks 6" in 15 minutes. What is the cause? - CORRECT ANSWER Cylinder leak (520)" "** Where should you point the fire extinguisher when putting out a fire? - CORRECT ANSWER At the base of the fire" "** A car with a "Selective Collective" controller is moving to the lobby to pick up a call. An up call is put in at the second floor. What happens? - CORRECT ANSWER Call is bypassed till the car is moving in the up direction." "** During construction, you land an escalator but it is 10mm to low. What is wrong? - CORRECT ANSWER Pit is too deep or Column Mark is off. (825)" "** During construction, the Omega CWT rails have been damaged. Why? - CORRECT ANSWER Overtightened from rail bracket. (215)" "** How do you attach brackets to brick/concrete blocks? - CORRECT ANSWER "Inserts" 1/4" back from brick/concrete blocks" "** What is the maximum "Moving Walk" incline? - CORRECT ANSWER 12 degrees. (830)" "** How does a GFCI work? - CORRECT ANSWER It detects an Imbalance between the Hot and Neutral wires." "** Who is required to provide you with the MSDS or SDS of a solvent you're using to clean rails? - CORRECT ANSWER Your Employer (105)" "** How do Emergency Doors swing? - CORRECT ANSWER Outward." "** You have to run an EMT run with 3 - 90s, 2 - 45s and a Saddle bend. What will be required? - CORRECT ANSWER An Intermediate Pull Box. No more than 360 degrees." "* What is the Max distance between Raceway supports? - CORRECT ANSWER 15'" "* What is the Max distance from Strain Bars? - CORRECT ANSWER 100'" "** What is the ratio between diameter and Loop of a Traveler? - CORRECT ANSWER 30 times." "** What is the minimum amount of Spares that should be pulled? - CORRECT ANSWER 10%" "** At what speed should the Governor Switch contact be set to open? - CORRECT ANSWER 90 - 95% of Governor tripping speed." "* What is the Max clearance between Door and Sill? - CORRECT ANSWER 3/8". (1/4" - 3/8")" "** What is the minimum Gib to Sill? - CORRECT ANSWER 1/4"" "* What is the minimum gap Sill - Sill? - CORRECT ANSWER 1/2"" "** What is the Max gap Sill - Sill? - CORRECT ANSWER 1 1/2"" "* A Force of 5000 lbs is applied to a plunger with an area of 25 sq inches. What is the system pressure? - CORRECT ANSWER 200 psi. (5000 lbs/ 25 sq inches = 200 psi" "** How many gallons are needed to run a 4" plunger 25'? - CORRECT ANSWER 16.3 gallons (V = A(H)" "* In Bi-Parting doors, what gap is allowed before Gate switch is opened? - CORRECT ANSWER 3/4" Max" "** What do you do before running a Hydro elevator after the car is built? - CORRECT ANSWER Check piston for debris and make sure Head is tight." "* What is going on if you add power to a generator but motor doesn't gain more speed? - CORRECT ANSWER Generator is Saturated." "* What is Relief set at? - CORRECT ANSWER 150%" "** What is the Maximum door closing force? - CORRECT ANSWER 30 lbs (7 lb Kinetic Force)" "** What do you do before replacing a relay on a controller? - CORRECT ANSWER Turn power off and Lock our Tag out" "* When are Oil Buffers required? - CORRECT ANSWER Above 200FPM" "* What amount of Crosby's do you use on 1/2" rope? - CORRECT ANSWER 3" "* SCRs are good for what? - CORRECT ANSWER They are quieter and cause less vibration than an MG Set." "* 1 gallon is how many cubic inches? - CORRECT ANSWER 231" "** What best describes the operation of a typical Hydro Block Valve with an Elevator parked at the lobby? - CORRECT ANSWER The Down Valve is closed. The Check Valve is closed. The Up Valve is open." "*What is the definition of Working Pressure? - CORRECT ANSWER Full Load Up pressure" "* What is the conversion from Kilograms to Lbs? - CORRECT ANSWER 1 Kilogram = 2.2 lbs" "Ohms Law - CORRECT ANSWER " "Circuit Symbol - Type of Gate - Logic Characteristics - CORRECT ANSWER " "Rules for Series Circuits - CORRECT ANSWER " "Rules for Parallel Circuits - CORRECT ANSWER " "AC Sine wave Frequency and Period - CORRECT ANSWER " "AC Sine Wave "Effective Value" - CORRECT ANSWER " "AC Sine Wave "Average Value" - CORRECT ANSWER " "AC Sine Wave "Peak Voltages and Currents" - CORRECT ANSWER " "Mechanical and Electrical Degrees - CORRECT ANSWER " "Ohms Law for AC "Phasing" - CORRECT ANSWER " "* When are comp ropes (instead of comp chains) required? - CORRECT ANSWER 700 FPM" "** What diameter cable can be used as a handrail? - CORRECT ANSWER 1/4" steel cable" "3 phase rectifier Output? - CORRECT ANSWER 1.33 x Input" "Single phase rectifier Output? - CORRECT ANSWER 0.9 x Input" "Rated speed? - CORRECT ANSWER Full speed no load" "* Time constant question on test? - CORRECT ANSWER 45 seconds" "** How much weight to add to cwt question on test? - CORRECT ANSWER 11 plates" "** Inverting OpAmp - CORRECT ANSWER Analog Inverting" "SCR - CORRECT ANSWER Forward Biased" "** Sparking on generator? - CORRECT ANSWER High Mica" "** Dumbwaiter takes off while loading, why? - CORRECT ANSWER Non-Interference not working" "** What can AC generator Interpoles reduce? - CORRECT ANSWER Armature Reaction" "** Capacitor microfarad discharge question on test? - CORRECT ANSWER 5 seconds" "** 3rd floor bulb burned out question on test? - CORRECT ANSWER Shorted resistor" "If you are testing a circuit with a multimeter, what voltage reading would you expect to have when connected to C and E? - CORRECT ANSWER 120 VAC" "How do the relay contacts in figure 15 reverse the direction of this 3 phase motor? - CORRECT ANSWER By reversing L1 and L2" "You are required to adjust the brake shown in figure 26. For a slower drop, which of the following adjustments should be made? - CORRECT ANSWER Move BD resistor tap to the left" "Refer to figure 22. If the brake contact E fails to open when the brake coil is energized, what will happen? - CORRECT ANSWER The brake coil current will be unchanged" "Refer to figure 28. You observe that the brake time has shortened, preventing the car from leveling properly. Which of the following would cause this condition? - CORRECT ANSWER Diode open" "You have an old DC motor and are adding an SCR drive, what do you do to the interpoles? - CORRECT ANSWER Leave the interpoles alone. When adding a SCR drive to the generator, the series loop is removed, as are the 3 resistors. Everything else remains the same" "A hydro runs up with no load but will not run with a full load. What is the issue? - CORRECT ANSWER The relief valve is set too low - 815" "Runby for a 1:1 hits the CWT buffer 4" below the top landing. CWT runby should be set at 18". How much should the ropes be shortened? - CORRECT ANSWER 22" - 235" "You need to work on a freight door retiring cam, you LOTO the main line but there is still power on the cam. What circuit is still hot? - CORRECT ANSWER Door Operator disconnect -535" "The contractor requests that the vertical center of a Rack and Pinion hoist be moved. How do you do this? - CORRECT ANSWER Adjust tie downs and wall ties - 850" "Working pressure on a Hydro is 400 PSI. What is the maximum relief valve setting? - CORRECT ANSWER 400 x 150%= 600 PSI - 815" "What must be installed on a false care before operation? - CORRECT ANSWER Spring Loaded safeties - 110" "There is slight arcing between the brush and commutator. What action must be taken? - CORRECT ANSWER None Note: Heavy arcing= light brush pressure, Heavy brush pressure= mechanical wear" "If rigging is roped 3:1 and a BEAM CLAMP is used to lift a 6,000lb load. What is the beam capacity? - CORRECT ANSWER 18,000lbs -210" "How much resistance is measured over a normally closed switch? - CORRECT ANSWER .2 Ohms- should be zero but will never be that low" "A car traveling in the hoistway always stops at the same spot and blows a fuse. What causes this? - CORRECT ANSWER traveling cable has a cut/exposed wire or a short - 515" "When drilling a jack hole in sandy conditions what type of drill rig is required? - CORRECT ANSWER Rotary or Auger bit Note: Rotary=soft Percussion= rocky Combo= solid - 810" "A customer does not want an escape hatch on a residential elevator, under what condition is this legal? - CORRECT ANSWER Manual operation must be provided - 840" "Your helper wired the down direction and final limit switches, now the car will only travel up, what is the issue? - CORRECT ANSWER The down direction limit was wired incorrectly" "What does a square with a darkened upper triangle represent? - CORRECT ANSWER DC Relay Note: Square with a darkened lower triangle = latching relay Note: square with arrow through it = timer relay - 730" "The close door limit switch is not working, you have power at points 35-8, no voltage at 1-S2 why? - CORRECT ANSWER Door limit switch malfunction- *Sheet 1 730 prints*" "Car is running normally, but the Fire Service buzzer will not shut off, Why? - CORRECT ANSWER EHP 3-2 shorted *Sheet 2 730 prints*" "Relay STR has voltage, TRU has voltage, RU no voltage, why? - CORRECT ANSWER TRU 9/8 open * Sheet 3 730 prints*" "2nd floor PI lights then quickly shuts off, why? - CORRECT ANSWER X1 4-6 * Sheet 2 print 730 *" "Car will not travel to 2 without a 3 call, and will not go down to 3 without a 2 call? - CORRECT ANSWER 2 F1 4-6 * Sheet 1 print 730*" "Using sheet 3, why wont the motor start? - CORRECT ANSWER MOL1 T/B * Sheet 3 print 730*" "The step level switch on an escalator has been tripped, where do you check? - CORRECT ANSWER The upper and lower truss assemblies, trips if the step sags more than 1/8 inch. - 825" "You get a trouble call for an inoperable freight door. What must you do before you begin work? - CORRECT ANSWER Block open the door, LOTO, and barricades - 540" "You get shocked when attempting to move a car with a temp run bug, what is the problem? - CORRECT ANSWER Ground wire not hooked up - 810" "A Motor needs a sleeve bearing replaced, what type of bearing do you need? - CORRECT ANSWER Friction bearing AKA sleeve bearing - 420" "With a 7 foot platform, your inside cab wall clearance is 6'8". What is the thickness or take up of walls? - CORRECT ANSWER 2 inch thick walls" "You notice Roughing on the Gov and Tail Sheave. What should you check? - CORRECT ANSWER Rope diameter - 250" "Car doors are dragging in the sill, how high should the car doors be above the sill? - CORRECT ANSWER 1/4 inch - 525" "What type of safeties are required on a 300fpm car? - CORRECT ANSWER Type B wedge clamp - 240" "What is the maximum length motor-generator leads can be outside of a controller? - CORRECT ANSWER 6 feet - 505" "In what section of NEC is elevator, escalator, moving walks and dumbwaiters? - CORRECT ANSWER Article 620 - 505" "What is the ratio between the loop and diameter of a round traveler? - CORRECT ANSWER 30 times - 515" "What are minimum and maximum clearance between sill and car doors? - CORRECT ANSWER 1/4 inch minimum 3/8 inch maximum - 530" "What is maximum leading edges for center opening doors? - CORRECT ANSWER 1/2 inch - 530" "What is minimum sill to gib engagement? - CORRECT ANSWER 1/4 inch - 530" "What is minimum and maximum sill to sill gap? - CORRECT ANSWER Minimum- 1/2 inch Maximum- 1-1/2 inch - 525" "1 gallon equals how many cubic feet? - CORRECT ANSWER 231 -815" "How many gallons are need to run a 6" plunger 30'? - CORRECT ANSWER Area= 3.14 x R2 = 3.14 x6=18.84 Height= (12"x30')=360" Volume= Area x Height= 18.84 x 360"=6782.4" "A force of 5,000lbs is applied to a plunger with an area of 25 sq in. What is the system pressure? - CORRECT ANSWER Pressure= Force/ area Area= Force/pressure 5000 lbs/25 sqin= 200 psi - 815" "What best describes the operation of a typical hydro block valve with elevator parked at the lobby? - CORRECT ANSWER Down valve: Closed Check valve: Closed Up Valve: open" "What is the definition of working pressure? - CORRECT ANSWER Fully loaded to capacity, Full speed running up - 815" "What is the conversion for kg to pounds? - CORRECT ANSWER 1 kg = 2.205 lbs" "On a geared machine the worm and worm gear are made out of what materials? - CORRECT ANSWER Steel and Bronze" "What is the purpose of a gear reduction unit on a geared machine? - CORRECT ANSWER Increased lifting capacity" "What holds a stopped Hydraulic elevator? - CORRECT ANSWER Check valve" "What must be done if you get on top of a dumbwaiter? - CORRECT ANSWER Never fully get on top. Work only partially on with the mainline disconnect off." "How do you measure an escalator handrail? - CORRECT ANSWER Mark the top and bottom of the inclination, measure in between and mov the car until the bottom mark is at the top. measure again and continue doing this until you see your 1 mark. The last measurement will be shorter. Add all the measurements together to get your length. -835" "A moving walk has an inclination of 10 degrees, what is the highest angle in can be? - CORRECT ANSWER 12 degrees for a moving walk 31 degrees for an escalator" "In a Ward-Leonard system, if all 3 contacts close what will happen? - CORRECT ANSWER The car run at full speed - 415" "What type of oil do you put in the machine? - CORRECT ANSWER Gear oil, non-detergent, single viscosity" "A 75 ohm resistor has blown, no replacement, how do you fix it? - CORRECT ANSWER 3 - 225 ohms in parallel . 3- 25 ohm resistors in series." "If a Rack and Pinion hoist is not plumb, level and square. What can happen? - CORRECT ANSWER Set the safeties" "What are extension tubes used for? - CORRECT ANSWER Necessary clearance for placement of concrete forms." "You are installing machines, governors, and generators, and need to know the location where it needs to be installed. Where would you find the information? - CORRECT ANSWER The machine room plan view" "What is the minimum breaking strength of a wire rope used as life safety? - CORRECT ANSWER 5,000 pounds" "What is known as the silent killer? - CORRECT ANSWER CTW" "You go to a trouble call and the building owner keeps asking when the car will be back up and if you can take any short cuts to get it up faster. what is your response? - CORRECT ANSWER Give a reasonable response on time and safety factors. If that doesnt work he can **** off" "You are preparing to replace a resistor on an out of service car. What is the 1st thing to do? - CORRECT ANSWER Make sure it is LOTO and verify no voltage" "What are 3 major factors in hydraulic pit maintenance? - CORRECT ANSWER Oil, tripping hazards, electricity" "What is the tolerance for 3/8 at .003? - CORRECT ANSWER .372- .378 bilateral= 2 direction unilateral= 1 direction" "You are installing push buttons using snake eye screws. What type of screwdriver? - CORRECT ANSWER Tamper proof" "You are working with eye bolts, where would you check for lifting capacity? - CORRECT ANSWER NEVER use eye bolts for hoisting" "You are installing the limit cam on the car and notice that the holes are not lining up. Where do you find the correct location for the cam? - CORRECT ANSWER The mechanical detail drawing" "You are on a call and find the pulley came off the pump motor and the set screw is missing, what kind of screw would you use to replace the set screw? - CORRECT ANSWER Cup screw" "You have to measure the outside of a pipe. What tool would you use? - CORRECT ANSWER Caliper Rule" "You are installing spring buffers on a 200 fpm car, what is the minimum buffer stroke? - CORRECT ANSWER 200 fpm= 4 inch Note: 100 fpm= 1 1/2 inch Note : 100 fpm- 150 fpm = 2 1/2 inch" "You are going to replace the disc on your grinder, what test should you do before using? - CORRECT ANSWER Ring test" "How often do electrical cords need to be checked for continuity? - CORRECT ANSWER Every 3 months" "The DBG is 6'6" using 15 lb rails with 1/4 shim on the brackets, what is DBB? - CORRECT ANSWER (2) 15 lb rails is 3 1/2 deep= 7" total. (2) 1/4" shims= 1/2" 6'6"+ 7 1/2 = 7 foot 1 1/2 inch" "How does OSHA classify a competent person? - CORRECT ANSWER One who is capable of identifying existing and potential hazards, and who has authorization to take prompt, corrective measurements" "Car weighs 7,000 lbs with a capacity of 3,500 lbs. What does the CWT weight? - CORRECT ANSWER 3,500 lbsx 40%= 1400 lbs 7000 lbs + 1400 lbs= 8400 lbs" "You are stacking rails in a single hydro hoist way, with a rise of 48' how many rails will you need? - CORRECT ANSWER 48'/ 16' = 3 rails per side 3 x2 sides= 6 rails" "Installing a 3,000 lb capacity car, how much load will the break stop and hold? - CORRECT ANSWER 125% of rated capacity= 3000 lbs x 125%= 3,750 lbs" "On traction elevators where are the bottom guide shoes mounted? - CORRECT ANSWER To the safety plank" "You have a hoist rated at 3,000 lbs, if you use a double block to single block reeving, what would your total lifting capacity be? - CORRECT ANSWER 6,000 lbs" "You need to find the DBG for the car, where would you find this information? - CORRECT ANSWER Final layout or hoistway plan view drawing" "How would you connect an ohm-meter to check load resistance? - CORRECT ANSWER Black to common, Red to V, ohm switch at Ohm. No power, take one lead off, connect in parallel, analog needs to be zeroed" "Exciter voltage comes from what source? - CORRECT ANSWER Generator" "Youre pulling (15) #14 awg, (27) #16 awg, (57) # 18 awg wires. How many spares needed? - CORRECT ANSWER (2) # 14, (3) # 16, (6) #18 = 10% spares required" "You have (26) 16' 22 lb rails and (2) 8'22 lb rails, what is the total weight of the rails? - CORRECT ANSWER 27 rails x 16' x 22 lbs= 9504 lbs" "You need to replace an unmarked single phase transformer with primary voltage at 220 vac current at 5 amp. What size would you need to double it? Note: kVa sizing must be calculated from primary or secondary volt + amp info - CORRECT ANSWER 2.2 kVa" "You have attempted to start up a 3 phase AC motor and stalls then hums or growls? - CORRECT ANSWER If the rotor bar becomes loose at the ring connection, or if the rotor bar cracks, current cannot flow through the bar, and the entire rotor is disrupted, causing loud growl or humming sound" "Your fluke digital multimeter reads 440 vac, what value are you reading? - CORRECT ANSWER 440 vac RMS" "You have determined that the period of an oscillation that you can feel in the car is .5 seconds. What is the frequency of the oscillation? - CORRECT ANSWER 2 hz frequency from time or period F=1/T F=1/.5= 2hz" "Customer complains that elevator is having door problem at every floor. Where do you start trouble shooting? - CORRECT ANSWER The car doors" "Freight doors are binding because they are hanging out of square, what adjustments can you make? - CORRECT ANSWER Adjust door track chains" "You are about to start installing your duct run in the hoist way. What is the best method to give you the straightest line? - CORRECT ANSWER Using a plumb bob, snap the line, and measure off of the rail" "When installing multiple traveling cables, where is the first cable located? - CORRECT ANSWER First is closest to the rail" "You momentarily actuate the motor starting relay, the direction of rotation is not correct, what can be done to change rotation direction? - CORRECT ANSWER Reverse any 2 leads of incoming motor phases" "Before you can move a piston on a hydro, what precautions must be taken? - CORRECT ANSWER Check the piston for debris and tightness of the head, make sure pit is clear" "You are preparing to hoist the car for cable installation, before doing this, what needs to be installed? - CORRECT ANSWER The governor cable" "While on service you observe the mechanical style safety edges on center opening doors bumping into each other, reopening the doors. Where do you need to look to repair this problem? - CORRECT ANSWER The safety edge retraction mechanism" "You are about to trouble shoot an elevator that is off, what print would help make it easier to trace the circuits? - CORRECT ANSWER Straight line diagram" "The fuses on a 3 phase input to DC direct drive are open, and the elevator will not run, what needs to be done to check for a shorted SCR? - CORRECT ANSWER Remove the SCR, connect + lead to anode, - lead to cathode, jumper between anode and gate .7v if good. Remove jumper and it should stay on, remove a lead should read infinite" "Troubleshooting a 3 input and gate, all inputs are high, but the gate output is low. What is the problem? - CORRECT ANSWER Faulty gate. Truth table says output should be high." "Youre going to a trouble call and you find that the machine room has 2 inches of water in it, what is the first thing you do? - CORRECT ANSWER Leave the machine room" "You find a blown fuse in the DC circuit feeding the door motor. When picking a replacement fuse what should you do? - CORRECT ANSWER Compare the blown fuse to the fuse rating in the straight line diagram" "A DC door motor supplied from a 3 phase rectifier runs slow. The DC voltage that is normally 320 is 220. What should you do? - CORRECT ANSWER Check the fuse feeding the AC rectifier" "There is a call that a traction elevator is stuck in the overhead. In order to get the car down, what circuits do you need to jump out? - CORRECT ANSWER The primary safety circuits" "You just pulled multi-cables down the hoistway of a high rise. How should you provide strain relief for the cables? - CORRECT ANSWER Required every 100'. Begin at the lowest and work upwards to adjust tension" "Installing horizontal sliding doors with guides in each door panel, how far must each guides engage the sill gauge? - CORRECT ANSWER 1/4 inch" "Your supervisor informs you to change software on a hydro microprocessor board. The software is a 24 pin DIP package. To properly orientate the new chip on the board, what must you do? - CORRECT ANSWER Verify that the notch on the dip chip matches the notch on the board" "You need to speed up an AC motor that has a fixed number of poles. How can you speed it up using the RPM formula? - CORRECT ANSWER Change the frequency. RPM= 60 x F/ P/2" "You have finished digging a hole hydro, the jack is not on site. What must the hole have on it before you leave? - CORRECT ANSWER A welded cover" "A CWT frame weighs 10,000 lbs and needs to be increased by 5%. What is the new weight of the frame? - CORRECT ANSWER 10,500 lbs" "You have 32' of rise in scaffolding and are using a 3' x 5' base. Where are the tie offs? - CORRECT ANSWER 1st at 12' and cannot be more than 26' apart vertically 30' apart horizontally" "How is a step level switch on an escalator reset? - CORRECT ANSWER Manually" "What is the law of power? - CORRECT ANSWER P= E x I" "What is the maximum voltage drop that can occur across a 500 watt resistor carrying 2 amps of current? - CORRECT ANSWER E= P/I E= 500 watt/ 2 amps= 250 volts" "While testing for a locked rotor condition, what could happen if the testing was carried on for too long? - CORRECT ANSWER Damage to the stator or rotor" "What is needed to coordinate the movement and to dispatch hall calls? - CORRECT ANSWER A group controller" "Where is weight added on a freight door for balancing? - CORRECT ANSWER On the top" "What door is heavier on bi-parting freight doors? - CORRECT ANSWER The lower door because of the tucking sill" "What happens to the break when contact E opens? - CORRECT ANSWER Inserts more break resistance in the circuit, reducing the value of the break current. More resistance to hold the coil up and release current draw." "In a circuit with capacitance of 5 mf 120v and 200K ohm, how long to fully charge? - CORRECT ANSWER 5TC" A contractor wants to raise the car speed from 100fpm to 125fpm, it currently has a 12" sheave. What sheave is required? - CORRECT ANSWER Diam=12" 12/4=3" 25fpm=3" 100fpm + 25fpm= 12"+3"= 15" sheave" "A MOV (Metal Oxide Varistor) burns out. You replace it, but cannot read voltage or resistance. What should you do? - CORRECT ANSWER Replace it with a larger MOV" "On a Ward-Leonard circuit the break is set, but the motor is trying to slip through the break. What is the issue? - CORRECT ANSWER Suicide Circuit" "You have an old DC motor and are adding an SCR drive, what do you do to the interpoles? - CORRECT ANSWER Leave the interpoles alone. When adding a SCR drive to the generator, the series loop is removed, as are the 3 resistors. Everything else remains the same" "A hydro runs up with no load, but will not run with a full load. What is the issue? - CORRECT ANSWER The relief valve is set too low" "Runby for a 1:1 hits the CWT buffer 4" below the top landing. CWT runby should be set at 18". How much should the ropes be shortened? - CORRECT ANSWER 22"" "You need to work on a freight door retiring cam, you LOTO the main line but there is still power on the cam. What circuit is still hot? - CORRECT ANSWER Door Operator Disconnect/ Main Line Disconnect" "The contractor requests that the vertical center of a Rack and Pinion hoist be moved. How do you do this? - CORRECT ANSWER Adjust Tie Downs and Wall Ties" "Working pressure on a Hydro is 400psi. What is the maximum relief valve setting? - CORRECT ANSWER 400psi x 150%= 600psi" "What must be installed on a false car before operation? - CORRECT ANSWER Spring Loaded Safeties." "There is slight arcing between the brush and commutator. What action must be taken? - CORRECT ANSWER None. Heavy arcing=Light brush pressure. Heavy bush pressure=mechanical wear" "If rigging gear is roped 3:1 and a BEAM CLAMP is used to lift a 6,000lb load. What is the beam capacity? - CORRECT ANSWER 18,000lbs. Beam capacity is cut in half with use of clamp, when rigging all blocks, rope, and clamps will be Equal to the lowest load rating" "How much resistance is measured over a normally closed switch? - CORRECT ANSWER 1.2ohms. should be zero, but will never be that low" "A car traveling in the hoistway always stops at the same spot and blows a fuse. What causes this? - CORRECT ANSWER Traveling cable has a cut/exposed wire or a short" "How is a class 1 yearly buffer test preformed? - CORRECT ANSWER Car at bottom landing and on inspection, jump out direction and final limits. With pit clear, run down to compress buffers, buffers should fully extend within 90 seconds. 5yr: Full load Full speed CWT: Full speed Empty" "How many strain supports are required on a 350ft raceway? - CORRECT ANSWER 4. 1 every 100ft" "How is stainless steel drilled out? - CORRECT ANSWER Slow speed and constant pressure" "What is the required amount of retainer clips for wedge shackles and what is the spacing? - CORRECT ANSWER Minimum 2 clips. 1st at a maximum 4x the diameter of the rope 2nd at a maximum 8x the diameter above the 1st clip" "A 300ohm resistor burns out, but you don't have another one. How can you make one? - CORRECT ANSWER 2 600ohm resistors in parallel is 300ohms. Resistance is half of highest resistor in parallel circuit. 3 225ohm resistors in parallel is 75ohms." "When cutting laminated panels, which direction should the finish side face? - CORRECT ANSWER Finish side facing the cutting edge of the tool. Blade will burr the backside" "How do you cut a finished floor? - CORRECT ANSWER Cutting blade away from finished side" "A 480vac stepdown 240vac transformer is connected to a 3 phase rectifier, what is the output voltage? - CORRECT ANSWER 320vac 3 phase full wave = 1.33x output voltage" "A car is loaded with 125% and sinks, why? - CORRECT ANSWER Slipping through the break" "If you find a broken or missing barricade what should you do? - CORRECT ANSWER Write up a formal inspection request" "How many wires are needed for the following circuit? Exclude spares. BCE---SPI/BCD---SP2/BCD---SP4/BCD---UR1/BCE---UR2/BCE---DR1/CRE--- DR2/GRD - CORRECT ANSWER 11 wires. You do not need the duplicates" "How must a 9 lead 480/240 motor be wired for High Voltage? - CORRECT ANSWER L1(1) L2(2) L3(3) Low Voltage L1(1-7) L2(2- 8) L3(3-9) 7-4 8-6 9-5 4 5 6 + 120v______0-------0_______R2________A_________R1_______GRD" "There is voltage at the switch, but none at A, what is wrong? - CORRECT ANSWER Open at R2 or R1" "What does a square with a darkened upper triangle represent? - CORRECT ANSWER DC Relay darkened lower triangle=Latching Relay arrow=Timer" "The close door limit switch is not working, you have power at points 35-8, no voltage at 1-S2 why? - CORRECT ANSWER Door limit switch malfunction" "Car is running normally, but the Fire Service buzzer will not shut off, Why? - CORRECT ANSWER EHP 3-2 shorted" "Relay STR has voltage, TRU has voltage, RU no voltage, why? - CORRECT ANSWER TRU 9/8 open" "2nd floor PI lights then quickly shuts off, why? - CORRECT ANSWER X1 4-6" "Car will not travel to 2 without a 3 call, and will not go down to 3 without a 2 call? - CORRECT ANSWER 2F1 4-6" "Sheet 3, why wont the motor start? - CORRECT ANSWER MOL1 T/B" "The step level switch on an escalator has been tripped, where do you check? - CORRECT ANSWER Upper and Lower Truss assemblies, trips if step sags more than 1/8th inch" "You get a trouble call for an inoperable freight door. What must you do before you begin work? - CORRECT ANSWER Block open the door. LOTO. Barricades" "You get shocked when attempting to move a car with a temp run bug, what is the problem? - CORRECT ANSWER Ground wire not hooked up" "A motor needs a sleeve bearing replaced, what type of bearing do you need? - CORRECT ANSWER Friction bearing AKA Sleeve bearing. Anti-Friction Bearing AKA Ball bearing" "7-foot platform with inside cab clearance of 6'8", what is the thickness of the cab walls? - CORRECT ANSWER 2-inch-thick walls" "You notice Roughing on the Gov and Tail Sheave. What should you check? - CORRECT ANSWER Rope Diameter" "Car doors are dragging in the sill, how high should the car doors be above the sill? - CORRECT ANSWER ¼ inch" "What type of safeties are required on a 300fpm car? - CORRECT ANSWER Type B wedge clamp" "What stopping devices are required on vertical platforms? - CORRECT ANSWER 2 pan switches. 15lbs max pressure" "What type of oil is required for sleeve bearings? - CORRECT ANSWER Single viscosity SAE 20" "What is the maximum inclination for moving walks? - CORRECT ANSWER 12 degrees" "How does a GFI work? - CORRECT ANSWER Detects an imbalance between Hot and Neutral Wires" "Who is required to provide MSDS or SDS for a solvent you are using? - CORRECT ANSWER Your employer" "How do emergency doors swing? - CORRECT ANSWER Outwards" "You have an EMT run with 3-90s, 2-45s, and a saddle bend. What is required? - CORRECT ANSWER An Intermediate pull box. 360 degrees is most bends for a continuous pipe" "What is the maximum distance between vertical race way supports? - CORRECT ANSWER 15 feet" "What is the smallest wire used inside travelers and outside of travelers? - CORRECT ANSWER #20awg #24awg" "What is the maximum distance between strain relief supports? - CORRECT ANSWER 100 feet" "What is the maximum length Motor-Generator leads can be outside of a controller? - CORRECT ANSWER 6 feet" "In what section of NEC is elevator, escalator, moving walks, and dumbwaiters? - CORRECT ANSWER Article 620" "What is the ratio between the loop and diameter of a round traveler? - CORRECT ANSWER 30 times" "What are the most common features of Load Weigh? - CORRECT ANSWER Control generator field and Inside express operation" "What is required by ASME on the car top? - CORRECT ANSWER Inspection station, Light, and Duplex outlet." "At what distance from closed does the gate switch operate? - CORRECT ANSWER 2 inches" "What is the minimum number of spares that should be pulled? - CORRECT ANSWER 10 %" "At what speed should the Gov. switch contact be set to open? - CORRECT ANSWER Electrical 90% of Tripping speed for 150fpm-500fpm. 95% for +500fpm" "If the DC output of a 3 phase rectifier is lower than specified, what is the problem? - CORRECT ANSWER AC fuse is blown. 1 input phase is missing" "What is the overlap minimum on 2 & 3 speed doors? - CORRECT ANSWER Horizontal ½ inch Vertical 1 inch" "What are minimum and maximum clearance between sill and car doors? - CORRECT ANSWER ¼ inch Minimum 3/8-inch Maximum" "What is maximum leading edges for center opening doors? - CORRECT ANSWER ½ inch" "What is minimum sill to gib engagement? - CORRECT ANSWER ¼ inch" "What is minimum and maximum sill to sill gap? - CORRECT ANSWER ½ inch to 1 ½ inch" "1 gallon equals how many cubic feet? - CORRECT ANSWER .134 cubic feet" "How many gallons are needed to run a 6" plunger 30'? - CORRECT ANSWER 30' to inch= 360" 3x3x3.14=28.26 28.26x360=10,173.6/231=44.04 gallons 4" 25': 25x12=300 2x2x3.14=12.56x300=3768/231=16.3 gallons" "A force of 5,000lbs is applied to a plunger with an area of 25sqin. What is system pressure? - CORRECT ANSWER 200psi 500/25 PRESSURE=FORCE/AREA AREA=FORCE/PRESSURE" "What best describes the operation of a hydro valve, with the elevator at the lobby? - CORRECT ANSWER Down valve: Closed Check valve: Closed Up valve: Open" "What is the definition of working pressure? - CORRECT ANSWER Fully loaded to capacity, Full speed running up" "What is the conversion for kg to pounds? - CORRECT ANSWER 1kg=2.205lbs" "On a geared machine the worm and worm gear are made out of what materials? - CORRECT ANSWER Steel and Bronze" "What is the purpose of a gear reduction unit on a geared machine? - CORRECT ANSWER Increased lifting capacity" "What holds a stopped Hydraulic elevator? - CORRECT ANSWER Check valve" "What must be done if you get on top of a dumbwaiter? - CORRECT ANSWER Never fully get on top. Work only partially on with the mainline disconnect off" "How do you measure an escalator hand rail? - CORRECT ANSWER Mark the top and bottom of the inclination, measure in between and move the car until the bottom mark is at the top, measure again and continue doing this until you see your 1st mark. The last measurement will be shorter. Add all the measurements together to get your length." "A moving walk has an inclination of 10degrees, what is the highest angle it can be? - CORRECT ANSWER 12degrees escalator 31degrees" "In a Ward-Leonard system, if all 3 contacts close what will happen? - CORRECT ANSWER The car will run at full speed" "What type of oil do you put in a machine? - CORRECT ANSWER Gear oil, non-detergent, single viscosity" "A 75ohm resistor has blown, no replacement, how do you fix it? - CORRECT ANSWER 3-225ohm resistors in parallel. 3-25ohm resistors in series" "If a Rack and Pinion hoist is not plumb, level and square. What can happen? - CORRECT ANSWER Set the Safeties" "What are extension tubes used for? - CORRECT ANSWER Necessary clearance for placement of concrete forms." "If a hoist motor is making noise, what is the problem? - CORRECT ANSWER To help prevent distortion to the building AC supply, INDUCTORS can be used on AC input of a solid state drive. Inductors can serve double duty, they operate as Transformers, to match input voltage, or provide voltage isolation. As well as performing filtering on notch effect." "What is the area of a 10" plunger? - CORRECT ANSWER Pie x Radius Squared= Area 3.14x5x5=78.5" "The escape hatch opens in what direction? - CORRECT ANSWER From the outside of the car up, preventing people from getting on top of the car" "What drawing will show how many and location of fixtures? - CORRECT ANSWER The elevator Abstract. Rails, lanterns, push buttons, etc. and quantity, color, material, etc" "You have to order P.I. for a 12 stop building with 3 cars. 3 floors do not have P.I. what is the total number of P.I. you need to order? - CORRECT ANSWER 12x3=36 total floors 3 floors with no p.i.=9 36-9=27 P.I. needed" "If an elevator travels 1760rpm @ 60hz, how many hz needed to run at 600fpm? - CORRECT ANSWER 20hz 600/60=10 assume 4 poles. 10x2=20" "You see a saw tooth wave form when using an oscilloscope out of the encoder, is that good? - CORRECT ANSWER NO. A perfect encoder will show a square wave. Saw tooth, when encoder has a fault" "What are the hand signals for crane operation? - CORRECT ANSWER Thumbs out=Boom out Thumbs in=Boom in Thumb up=Boom up Thumb down=Boom down Finger up clockwise=Hoist up Finger down counter clockwise=Hoist down Arm out=Stop" "You are working on a MOD and have to move the controller 30 feet farther away, you notice voltage drop, what can be done to increase voltage? - CORRECT ANSWER Use a larger gauge of wire" "What is the weight of normal rails? 15 full 16' rails and 2 8' rails - CORRECT ANSWER 16 x 16' x 15lbs = 3840lbs" "What is an acceptable substitute for the top rail of a barricade? - CORRECT ANSWER ¼ inch thick wire rope" "What is the proper way to test incoming voltage? - CORRECT ANSWER 3 phase AC using digital meter: L1-L2 L1-L3 L2-L3 Hydro at pump starter. Traction at L1, L2, L3" "When replacing a PCB in a controller what precautions must be taken? - CORRECT ANSWER Use a grounding wrist strap, and never remove anything with the power on" "Who gives you a right to a safe work space? - CORRECT ANSWER OSHA" "On an ANNUAL static load test, the car drifts down 15" in 10 minutes. There is no visible oil in the pit, where is the leak coming from? - CORRECT ANSWER Underground. Annual static test required for unexposed cylinders" "What training must be done before you can enter a pit that has been classified as a confined space? - CORRECT ANSWER Confined space entrant training" "Traction and Hydraulic machines have many hazards, what is most dangerous? - CORRECT ANSWER Rotating Equipment" "You are installing a machine and sheave, where would machine and secondary sheaves be aligned? - CORRECT ANSWER In the center of the Rail measurements" "You are testing an elevator with a rated speed of 500fpm. What is the minimum speed the safeties should set at? - CORRECT ANSWER 575fpm. Mechanical:115% x 500=575. Electrical:90% x 575=517.5fpm" "What is one of the most dangerous Hazards in the trade and most obvious for us? - CORRECT ANSWER FALLS" "You are installing machines, governors, and generators, and need to know the location where it needs installed. Where would you find the information? - CORRECT ANSWER The machine room plan view" "What is the minimum breaking strength of a wire rope used as Life Safety? - CORRECT ANSWER 5,000 pounds" "What is known as the silent killer? - CORRECT ANSWER CTW" "You go to a trouble call and the building owner keeps asking when the car will be back up and if you can take any short cuts to get it up faster. What is your response? - CORRECT ANSWER Give a reasonable response on time and safety factors. If that doesn't work, he can **** OFF" "You are preparing to replace a resistor on an out of service car. What is the 1st thing do? - CORRECT ANSWER Make sure it is LOTO and verify no voltage." "What are 3 major factors in Hydraulic pit maintenance? - CORRECT ANSWER Oil, Tripping hazards, Electricity" "What is the tolerance for 3/8 at .003? - CORRECT ANSWER 372-.378 bilateral=2 direction unilateral=1 direction" "You are installing push buttons using snake eye screws. What type of screwdriver? - CORRECT ANSWER Tamper Proof" "You are working with EYE BOLTS, where would you check for lifting capacity? - CORRECT ANSWER NEVER use eye bolts for hoisting" "You are installing the limit cam on the car and notice that the holes are not lining up. Where do you find the correct location for the cam? - CORRECT ANSWER The mechanical detail drawing" "You are on a call and find the pulley came off the pump motor and the set screw is missing, what kind of screw would you use to replace the set screw? - CORRECT ANSWER Cup Screw" "You have to measure the outside of a pipe. What tool would you use? - CORRECT ANSWER Caliper Rule" "You are installing spring buffers on a 200fpm car, what is the minimum buffer stroke? - CORRECT ANSWER 4inch 100fpm 1 ½ inch 100fpm-150fpm 2 ½ inch 200fpm 4 inch" "You are going to replace the disc on your grinder, what test should you do before using? - CORRECT ANSWER Ring test" "How often do electrical cords need to be checked for continuity? - CORRECT ANSWER Every 3 months" "The DBG is 6'6" using 15lb rails with ¼ shim on the brackets, what is DBB? - CORRECT ANSWER 7' 1 ½" 15lb rail is 3 ½ deep so 7" total. 2 ¼" shim is ½". 6'6" + 7 ½" =7 foot 1 ½ inch" "How does OSHA classify a competent person? - CORRECT ANSWER One who is capable of identifying existing and potential hazards, and who has authorization to take prompt, Corrective measurements" "Car weighs 7,000lbs with a capacity of 3,500lbs. what does the CWT weigh? - CORRECT ANSWER 8,400lbs 3500 x 40 / 100=1,400lbs 7,000 + 1,400 = 8,400" "You are stacking rails in a single hydro hoist way, with a rise of 48' how many rails will you need? - CORRECT ANSWER 6 total rails 48' / 16' = 3 3 x 2 sides = 6 rails" "Installing a 3,000lb capacity car, how much load will the break stop and hold? - CORRECT ANSWER 3,750lbs 125% of rated capacity 3,000 x 125 = 375,000 / 100 = 3,750" "On traction elevators where are the bottom guide shoes mounted? - CORRECT ANSWER To the safety plank" "You have a hoist rated at 3,000lbs, if you use a double block to single block reeving, what would your total lifting capacity be? - CORRECT ANSWER 6,000lbs" "You need to find the DBG for the car, where would you find this information? - CORRECT ANSWER Final layout or Hoistway plan view drawing" "You are hoisting rails into the hoist way using a capstan hoist, your apprentice is having a hard time pulling in rails. What can be done to make it easier? - CORRECT ANSWER Add another or more wraps to the capstan hoist" "Responding to a call on a hydro, you determine that the 50amp circuit breaker that feeds the controller has tripped. What component of the elevator has the ability to cause this problem? - CORRECT ANSWER The pump motor" "The motor field windings on a DC motor are wound around a laminated core. The composition of the core material is dependent upon which characteristics? - CORRECT ANSWER Permeability: the ability of a substance to pack in magnetic lines of flux in a given space" "You suspect a phasing issue with building power. Which controller device should you check 1st? - CORRECT ANSWER Reverse phase relay: detects if incoming power has a loss of phase or phase reversal" "How do you measure AC voltage on a Digital Multimeter? - CORRECT ANSWER Function to VAC Red lead to Volt ohm Black lead to common" "Sometimes necessary to increase output of a DC generator to over speed an elevator as part of the safety test. If maximum output is reached and speed cannot be increased, it is said to be what? - CORRECT ANSWER Saturated: cannot produce any more magnetic lines of flux" "What hydro piece uses electrical power using the principle of electromagnetism? - CORRECT ANSWER Hydro Valve Solenoid: electro-mechanical device operated by a coil and having an iron core steel plunger As an armature" "Which of the following maintenance procedures addresses the issue of proper DC generator commutation? - CORRECT ANSWER Continued contact between brushes and commutator" "Customer is complaining that an older SCR drive powered elevator, is causing noise in the building power lines. What can help reduce the noise? - CORRECT ANSWER Isolation Transformer: Used to minimize electrical noise from being reflected back to supply lines" "In a series circuit with a 10K ohm resistor and a 2mA current, what is Voltage? - CORRECT ANSWER 20v E=R x I 10,000 x .002= 20v" "How would you connect an ohm-meter to check load resistance? - CORRECT ANSWER Black to common Red to V ohm Switch at Ohm. No power, take one lead off, connect in parallel Analog needs to be Zeroed 1 st" "Exciter voltage comes from what source? - CORRECT ANSWER Generator" "Your pulling 15 #14awg 27 #16awg 57 #18awg wires. How many spares needed? - CORRECT ANSWER 2 #14 3 #16 6 #18 10% spares required" "You have 26 16' 22lb rails and 2 8' 22lb rails, what is the total weight of the rails? - CORRECT ANSWER 27 x 16 x 22 = 9504lbs" "You need to replace an unmarked SINGLE PHASE transformer with primary voltage at 220vac current at 5amp. What size would you need to double it? - CORRECT ANSWER KVa sizing must be calculated from primary or secondary volt + amp info Single phase kVa=(VxI) / 1,000 kVa=220x5=1100 / 1000= 1.1 kVa 2.2 kVa needed to double" "You have attempted to start up a 3 phase AC motor and stalls then hums or growls? - CORRECT ANSWER If the rotor bar becomes loose at the ring connection, or if the rotor bar cracks, current cannot flow through The bar and the entire rotor field is disrupted, causing loud growl or humming sound" "Your fluke digital Multimeter reads 440vac, what value are you reading? - CORRECT ANSWER 440vac RMS" "You have determined that the period of an oscillation that you can feel in the car is .5 seconds. What is the frequency of the oscillation? - CORRECT ANSWER 2hz Frequency from time or Period F=1/T F=1/.5= 2hz" "Customer complains that elevator is having door problem at every floor. Where do you start trouble shooting? - CORRECT ANSWER The car doors" "Freight doors are binding because they are hanging out of square, what adjustments can you make? - CORRECT ANSWER Adjust door track chains" "You are about to start installing your duct run in the hoist way. What is the best method to give you the straightest line? - CORRECT ANSWER Using a plumb bob, snap the line, and measure off of the rail" "When installing multiple Traveling cables, where is the 1st cable located? - CORRECT ANSWER 1 st is closest to the rail." "2 controllers in a small machine room face each other, what is the minimum clearance between them? - CORRECT ANSWER 36 inches" "When installing travelers, what is the minimum length of vertical suspension at both ends before the loop starts? - CORRECT ANSWER 4 feet" "You attempt to adjust a new VV-VF door operator, but it operates in the wrong direction. How do you change the direction? - CORRECT ANSWER Change the phase sequence" "You receive a call that a center opening car is running with one door partially open, how is this possible? - CORRECT ANSWER The gate switch is activated by the door drive, but the relating device has failed" "In order to properly bond an isolation platform, where should you connect your bonding straps? - CORRECT ANSWER From the platform to the car sling" "As a mechanic you are sent to install an escalator, what point of reference would you use to square the unit? - CORRECT ANSWER Column LINE" "Escalator demarcation lights are required by code for what reason? - CORRECT ANSWER To provide passengers with a visual indication when entering and exiting the unit." "While adjusting a passenger elevator door operator with a PERMANENT MAGNENT DC motor. Which operation would you perform to control the motor? - CORRECT ANSWER Speed and Torque control is accomplished by varying armature current and voltage only SHUNT MOTORS: shunt voltage increases, torque increases, speed decrease. Shunt voltage decreased, torque decrease, speed increase Armature voltage increase, rotation speed increase affecting door speed and torque." "What does ASME code specify regarding clearance between skirt panel and the side of the step tread? - CORRECT ANSWER Skirt board switches required at upper and lower ends. Gap no more than 3/16"" "After receiving an inspection report, one violation is door closing force. After checking you read 50lb of door force, is this code? How do you make it code compliant? - CORRECT ANSWER Not code. Code is 30lb or less. To fix it you need to adjust the torque/speed of door operator" "You momentarily actuate the motor starting relay, the direction of rotation is not correct, what can be done to change rotation direction? - CORRECT ANSWER Reverse any 2 leads of incoming motor phases." "Before you can move a piston on a hydro, what precautions must be taken? - CORRECT ANSWER Check the piston for debris and tightness of the head, make sure pit is clear" "You are preparing to hoist the car for cable installation, before doing this, what needs to be installed? - CORRECT ANSWER The governor cable" "While on service you observe the mechanical style safety edges on center opening doors bumping into each other, reopening the doors. Where do you need to look to repair this problem? - CORRECT ANSWER The safety edge retraction mechanism" "You are about to trouble shoot an elevator that is off, what print would help to make it easier to trace the circuits? - CORRECT ANSWER Straight Line Diagram" "The fuses on a 3 phase input to DC direct drive are open, and the elevator will not run, what needs to be done to check for a shorted SCR? - CORRECT ANSWER Remove the SCR, connect +lead to Anode, -lead to cathode, jumper between ANODE & GATE .7v if good. Remove jumper and it should stay on, remove a lead should read infinite" "Trouble shooting a 3 input AND gate, all inputs are high, but the gate output is low. What is the problem? - CORRECT ANSWER Faulty gate. Truth table says output should be high." "When going to a trouble call you find that the machine room has 2 inches of water in it, what is the first thing you do? - CORRECT ANSWER Leave the Machine room" "You find a blown fuse in the DC circuit feeding the door motor. When picking a replacement fuse what should you do? - CORRECT ANSWER Compare the blown fuse to the fuse rating in the straight line diagram" "A DC door motor supplied from a 3 phase rectifier runs slow. The DC voltage is normally 320 is 220. What should you do? - CORRECT ANSWER Check the fuse feeding the AC rectifier" "There is a call that a traction elevator is stuck in the overhead. In order to get the car down, what circuits do you need to jump out? - CORRECT ANSWER The primary safety circuits" "You just pulled multi-cables down the hoistway of a high rise. How should you provide strain relief for the cables? - CORRECT ANSWER Required every 100'. Begin installing at the lowest and work upwards to adjust and tension" "Installing Horizontal sliding doors with guides in each door panel, how far must each guide engage the sill gauge? - CORRECT ANSWER ¼ inch" "Your supervisor informs you to change software on a hydro microprocessor board. The software is a 24 pin DIP package. To properly orientate the new chip on the board, what must you do? - CORRECT ANSWER Verify that the notch on the dip chip matches the notch on the board" "You need to speed up an AC motor that has a fixed number of poles. How can you speed it up using the RPM formula? - CORRECT ANSWER Change the frequency. RPM= 60 x F / P/2" "You have finished digging a hole hydro, the jack is not on site. What must the hole have on it before you leave? - CORRECT ANSWER A welded cover" "A CWT frame weighs 10,000lbs and needs to be increased by 5%. What is the new weight of the frame? - CORRECT ANSWER 10,500lbs 10,000 x 5 / 100= 500lbs +10,000 = 10,500lbs" "You have 32' of rise in scaffolding and are using a 3'x5' base. Where are tie offs? - CORRECT ANSWER 1st at 12' and cannot be more than 26' apart vertically 30' apart horizontally" "How is a step level switch on an escalator reset? - CORRECT ANSWER Manually" "What is the Law of Power? - CORRECT ANSWER P=ExI" "What is the maximum voltage drop that can occur across a 500watt resistor carrying 2amps of current? - CORRECT ANSWER 250 volts P/I 500/2=250" "While testing for a locked rotor condition, what could happen if the testing was carried on for too long? - CORRECT ANSWER Damage to the stator or rotor" "What is needed to coordinate the movement and to dispatch hall calls? - CORRECT ANSWER A group controller" "Where is weight added on a freight door for balancing? - CORRECT ANSWER On the top." "What door is heavier on bi-parting freight doors? - CORRECT ANSWER The lower door because of the tucking sill" "What happens to the break when contact E opens? - CORRECT ANSWER Inserts more break resistance in the circuit, reducing the value of the break current. More resistance to hold the coil up and release current draw." "In a circuit with capacitance of 5mf 120v and 200K ohm, how long to fully charge? - CORRECT ANSWER 5TC .005 x 200 = 1(TC) 1 x 5 = 5 to fully charge. 1 time constant = 63.2% 5 time constant = 99%" "Valve Operations: - CORRECT ANSWER Check valve: oil flow in 1 direction Up valve: controls up start and accel to high speed, up slow down, up level, up stop Down valve: Elevator not running so it depends on system pressure Bypass and Relief: bypass oil if striking obstruction. If relief pressure is too low it will not pick" "SCR: - CORRECT ANSWER DC door motor control and commonly in direct drives. 3 terminal device acts as on/off switch by pulsing the gate with positive voltage Once on SCR remains on until Anode & Cathode voltage equalizes, or Anode & Cathode are reverse biased, or until voltage is removed from Anode & Cathode" "Amplifiers: - CORRECT ANSWER Inverting: Op amp(input) supplied to. NEGATIVE Non inverting: Input. POSITIVE" "Inductance in a DC Break: - CORRECT ANSWER R1 controls rate the magnetic field builds, R1 controls time it takes the break to energize after the BR contact closes. R2 is the discharge path for the break coil. R2 controls the time it takes the break to set when BR opens. R2 controls voltage spikes from the collapsing magnetic lines of the break coil when discharging, thus reducing spikes from reaching other parts of the circuit." "** A Hydro runs up with no load but does not run up with a full load. What is the issue? - CORRECT ANSWER The relief valve is set too low (805)" "** Runby for a 1:1 car hits the CWT buffer 4" below the top landing. The CWT runby should be set at 18". How much should the ropes be shortened? - CORRECT ANSWER 22" for 1:1. For a 2:1 with the same issue is 44"." "** You need to work on a freight door retiring cam. You LOTO the mainline disconnect but there is still power to the cam. What circuit is still hot? - CORRECT ANSWER Mainline disconnect (535)" "** The contractor requests that the vertical center of the Rack and Pinion hoist be moved. How is this accomplished? - CORRECT ANSWER Adjust Tie downs/Wall ties (805)" "** Working pressure on a Hydro is 400 PSI. What is the correct Relief Valve Setting? - CORRECT ANSWER 600 PSI Max. (805) 400 psi x 150% = 600 psi" "** A contractor wants to raise the car speed from 100 FPM to 125 FPM. It currently has a 12" sheave. What size sheave is required? - CORRECT ANSWER 15" (125 /100 = 1.25 1.25 x 12 = 15)" "** There is slight arcing at the Brushes and Commutator. What actions must be taken? - CORRECT ANSWER None. (430) "Heavy arcing is due to light brush pressure. Mechanical wear indicates heavy brush pressure." "** How many Strain Supports are required on a 350' raceway? - CORRECT ANSWER 4 One for every 100'" "** How is Stainless steel drilled out? - CORRECT ANSWER Slow speed and constant pressure (205)" "** What are the required amount of clips for Wedge Shackles and what is their spacing? - CORRECT ANSWER At least 2, with the first being 4 times the diameter of the rope from the top of shackle. Second is 8 times the diameter of the rope from the first." "** Car is loaded with 125% and sinks. Why? - CORRECT ANSWER Slipped through the brake." "** A 300 Ohm resistor burns out. You don't have a 300 Ohm resistor to replace it. What can you use to make up the resistor? - CORRECT ANSWER 2 600 Ohms resistors in Parallel. "The resistance is half of the highest rating in a parallel circuit. 3, 225 Ohm resistors in parallel equal 75 Ohms." "** A 480 VAC Step Down Transformer is connected to a 3 phase rectifier. What will the output be? - CORRECT ANSWER 320 VDC 480 - 33.33% = 320" "** If you find a broken or missing barricade, what do you do? - CORRECT ANSWER Write up a formal inspection request." "** If a Dumbwaiter has 9 square feet in Area, 4 ' High and the rated Capacity is 13.9 lb/ft3, what is the total capacity? - CORRECT ANSWER 500 lb/ft3. "The area of a Dumbwaiter is 9 sq' max and is 4' High. Multiply that b