Exam (elaborations)

Elevator Mechanic Exam Review 2023: Verified Solutions (A+ Guaranteed)

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Course
Elevator Mechanic

Institution
Liberty University

1. A contractor wants to raise the car speed from 100fpm to 125fpm, it currently has a 12" sheave. What sheave is required?: Diam=12" 12/4=3" 25fpm=3" 100fpm + 25fpm= 12"+3"= 15" sheave 2. A MOV (Metal Oxide Varistor) burns out. You replace it, but cannot read voltage or resistance. What should yo...

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Uploaded on April 30, 2023
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elevator mechanic exam
elevator mechanic exam review 2023 verified solutions a guaranteed
1 a contractor wants to raise the car speed from 100fpm to 125fpm
it currently has a 12 sheave what

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Elevator Mechanic Exam Review 2023: Verified
Solutions (A+ Guaranteed)
1. A contractor wants to raise the car speed from 100fpm to 125fpm, it
currently has a 12" sheave. What sheave is required?: Diam=12"
12/4=3" 25fpm=3" 100fpm + 25fpm= 12"+3"= 15" sheave
2. A MOV (Metal Oxide Varistor) burns out. You replace it, but cannot
read voltage or resistance. What should you do?: Replace it with a
larger MOV
3. On a Ward-Leonard circuit the break is set, but the motor is trying to
slip through the break. What is the issue?: Suicide Circuit
4. You have an old DC motor and are adding an SCR drive, what do you
do to the interpoles?: 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
5. A hydro runs up with no load, but will not run with a full load. What is
the issue?: The relief valve is set too low
6. 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?:
22"
7. 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?: Door
Operator Disconnect/ Main Line Disconnect
8. The contractor requests that the vertical center of a Rack and Pinion
hoist be moved. How do you do this?: Adjust Tie Downs and Wall Ties
9. Working pressure on a Hydro is 400psi. What is the maximum relief
valve setting?: 400psi x 150%= 600psi
10.What must be installed on a false car before operation?: Spring
Loaded Safeties.
11.There is slight arcing between the brush and commutator. What
action must be taken?: None.
Heavy arcing=Light brush pressure. Heavy bush pressure=mechanical
wear
12.If rigging gear is roped 3:1 and a BEAM CLAMP is used to lift a 6,000lb
load. What is the beam capacity?: 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
13. How much resistance is measured over a normally closed switch?: -

, Elevator Mechanic Exam Review 2023: Verified
Solutions (A+ Guaranteed)
1.2ohms. should be zero, but will never be that low
14.A car traveling in the hoistway always stops at the same spot and
blows a fuse. What causes this?: Traveling cable has a cut/exposed wire
or a short

, Elevator Mechanic Exam Review 2023: Verified
Solutions (A+ Guaranteed)
15.How is a class 1 yearly buffer test preformed?: 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
16.How many strain supports are required on a 350ft raceway?: 4. 1
every 100ft
17.How is stainless steel drilled out?: Slow speed and constant pressure
18.What is the required amount of retainer clips for wedge shackles and
what is the spacing?: Minimum 2 clips. 1st at a maximum 4x the
diameter of the rope
2nd at a maximum 8x the diameter above the 1st clip
19.A 300ohm resistor burns out, but you don't have another one. How can
you make one?: 2 600ohm resistors in parallel is 300ohms. Resistance
is half of highest resistor in parallel circuit.
3 225ohm resistors in parallel is 75ohms.
20.When cutting laminated panels, which direction should the finish side
face?: Finish side facing the cutting edge of the tool. Blade will burr
the backside
21.How do you cut a finished floor?: Cutting blade away from finished
side
22.A 480vac stepdown 240vac transformer is connected to a 3 phase
recti- fier, what is the output voltage?: 320vac
3 phase full wave = 1.33x output voltage
23.A car is loaded with 125% and sinks, why?: Slipping through the break
24.If you find a broken or missing barricade what should you do?: Write
up a formal inspection request
25. What are the consequences of misaligned joints on a Rack and Pinion?-
: Broken Gear teeth. CWT derailment. Excessive wear/ crease the
surface of the tube
26.A dumbwaiter is 9sqft in area, 4ft high, and capacity is 13.9lb/ft3. What
is total capacity?: 9 x 4 x 13.9= 500lbs Max capacity
27.You must enter a pit with a toxic atmosphere, how do you proceed?:

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