Elevator mechanics review Latest Questions With Passed Solutions!!

Car running up keep stopping why? - Answer-Contact is not deenergizing in push button Third-floor bulbs burn out why? - Answer-Shorted resistor Car will not travel to second floor without a third-floor me a call and will not go down from three without a second-floor hall, what's the problem? - Answer-2Fl 4/6 Why won't motor start? - Answer-MOL1 95/96 Car doors closed and won't run what do you check? - Answer-Check for voltage at four and five Bad Transistor Top barricade can be replaced with? - Answer-1/4" Cable There is voltage at the switch but none at point a what's wrong? - Answer-Either R1 or R2 open The door close limit switch is not working do you have power from 35 to term eight. No power from 1 to 52 why? - Answer-Door limit switch malfunction Car running normally but the buzzer will not shut off why? - Answer-EHP 2/3 shorted Relay STR has voltage. TRU has voltage, RU has no voltage, why? - Answer-TRU 9/8 Second floor PI illuminates then quickly extinguishes why? - Answer-X1 4/6 On a machine, what is drilled out first? - Answer-Secondary sheaveDumb waiter takes off before loading why? - Answer-Non interference Car levels in 3 inches high in down direction why? - Answer-Counterweight In bi-parting doors what gap is allowed before gate switch is open? - Answer-3/4" Pressure switch is wired in what direction - Answer-Down directional What is the tripping speed of counterweight governor? - Answer-No more than 10% higher There is excessive sparking on generator why? - Answer-High Micha How does interpoles affect the Armature? - Answer-Reaction What is the maximum door closing force? - Answer-30 lbs and 7 lbs kinetic What do you do before replacing a relay on a controller? - Answer-LOTO, Test, and Verify When are spring buffers used? - Answer-Less than 200fpm What are SCR's good for? - Answer-They are quieter and make less vibration then motor generator set You have a 200 ohm resistor at 200 Watts what do you replace it with? - Answer-75 ohm 200 watt adjustable resistor Pump overload keeps tripping. How do you measure amperage? - Answer-Clamp on meter separately each wire Customer complains about a third floor PI bulb burned out, why? - Answer-Shorted resistorThere are three elevators, 12 floors, customer does not want PI's on second, seventh, and eighth floor. How many total PI 's? - Answer-27 PI's 10k ohm resistor with 500mF. How long will it take to charge capacitor? - Answer-5 sec What do you do before running a Hydro after car is built? - Answer-Check piston for debris and make sure head is tight How to tell which side is right or left hand doors? - Answer-Inside looking out If you get a complaint that all floors make noise, what should you check? - Answer-Car doors What is the issue if you add power to a generator but the motor doesn't gain any more speed? - AnswerGenerator is saturated If a handrail switch is tripped and you reset it but the escalator immediately turns back on, what's the problem? - Answer-Start switch is stuck in the on position How many Crosbys do you use on half inch rope - Answer-3 What do U grooves need? - Answer-Double wrap What do you hold machine beams down with? - Answer-Tie downs When working on a PC board, what must you do? - Answer-Grounded wristband What is the boom out signal? - Answer-Arms out, thumbs out If there is high screeching, what should you check? - Answer-SCR driveWhat do you install first on a running platform? - Answer-Governor You have 52 traveling cables terminating in the controller how many total wires do you need? - Answer- 58 If rigging a motor into overhead, what type of rigging to prevent it from spinning? - Answer-Tagline, hoisting jack To run a freight car bi-parting doors must be? - Answer-Closed and locked Lula clearance per code? - Answer-3/4" A circuit that has permitted the elevator bypass up calls as the elevator travels down and vice versa? - Answer-Selective collective control How many millimeters in 1 inch? - Answer-25.4 What drawings are for physical components? - Answer-Final layout Relieve pressure on a Hydro? - Answer-150% of working pressure What is the strongest type of rope? - Answer-Seale rope You do a buffer test, what is acceptable time for it to retract? - Answer-60 sec What do you use to keep a machine from moving side to side? - Answer-Kick angle What is one of the first things you would do when doing a re-pack? - Answer-Pit stands, check cylinder for nicks and scratchesAt what degree are two leg bridal hitches most safe? - Answer-60° You are using a 4K lbs capacity hoist with a 4:1 set up, What's the max you can lift? - Answer-16K Governor tripping speed? - Answer-115% mechanical, electrical 10% less Hoist has no data tag, what do you do? - Answer-Remove from service