Exam (elaborations)

Elevator Mechanic Exam Review/ 216 Qs with Definitive Ans/

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Elevator Mechanic

Institution
Elevator Mechanic

Elevator Mechanic Exam Review/ 216 Qs with Definitive Ans/ . A contractor wants to raise the car speed from 100fpm to 125fpm, it currently has a 12" sheave. What sheave is required? - Answer: Diam=12" 12/4=3" 25fpm=3" 100fpm + 25fpm= 12"+3"= 15" sheave A MOV (Metal Oxide Varistor) burns out....

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Uploaded on December 31, 2024
Number of pages 25
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elevator mechanic

Institution Elevator Mechanic
Course Elevator Mechanic

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Elevator Mechanic Exam Review/ 216 Qs with
Definitive Ans/ 2024-2025.
A contractor wants to raise the car speed from 100fpm to 125fpm, it currently has a 12" sheave.
What sheave is required? - 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? - 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? - Answer: Suicide Circuit

You have an old DC motor and are adding an SCR drive, what do you do to the interpoles? -
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

Page 1 of 25

,Generator runs at 600rpm and has 4 poles, what is the output frequency? - Answer: 20hz
600/60=10 10x2=20 RPM 60 x frequency / pole/2

If a XOR gate was connected to a NOR gate and attached to an AND gate with a High output.
What is input of the XOR gate A&B? - Answer: Both must be High

Using BINARY logic, what DIP switches must be on for a 128 bit 30 second timer set at 150% -
Answer: 1,3,4,6=45 seconds

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 - Answer: 11
wires. You do not need the duplicates

How must a 9 lead 480/240 motor be wired for High Voltage? - 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? - Answer: Open at R2 or R1

What does a square with a darkened upper triangle represent? - 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? - Answer: Door limit switch malfunction

Page 2 of 25

, Car is running normally, but the Fire Service buzzer will not shut off, Why? - Answer: EHP 3-2
shorted

Relay STR has voltage, TRU has voltage, RU no voltage, why? - Answer: TRU 9/8 open

2nd floor PI lights then quickly shuts off, why? - 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? - Answer: 2F1
4-6

Sheet 3, why wont the motor start? - Answer: MOL1 T/B

The step level switch on an escalator has been tripped, where do you check? - 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? -
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? -
Answer: Ground wire not hooked up

A motor needs a sleeve bearing replaced, what type of bearing do you need? - 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? -
Answer: 2-inch-thick walls

Page 3 of 25

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