ELEVATOR MECHANICS PRACTICE
QUESTIONS & ANSWERS
(All questions are unique and safe for
study use.)
SECTION 1 — ELECTRICITY & MOTORS (1–20)
1. Which component controls the speed of an AC elevator motor?
A. Contactor
B. VVVF drive
C. Limit switch
D. Tachometer
2. The main purpose of an overload relay in an elevator motor circuit is to:
A. Increase motor torque
B. Prevent overspeed
C. Protect the motor from excessive current
D. Control direction
3. A motor draws high current during startup because:
A. Voltage is too high
B. Rotor is initially stationary
C. Slip is zero
D. Frequency is reduced
4. Which wiring method is required for traveling cables?
A. EMT
B. Flexible tray cable
C. BX cable
D. Ridgid conduit
5. A 3-phase motor that hums but does not rotate likely indicates:
A. Open ground
,B. One phase is lost
C. Overvoltage
D. A worn bearing
6. The tachometer on an elevator is used to:
A. Count door cycles
B. Measure car position
C. Monitor motor speed
D. Control leveling
7. Regen drives return energy to:
A. Battery backup
B. The building AC supply
C. The counterweight
D. The machine brake
8. Line voltage imbalance between phases must be within:
A. 15%
B. 10%
C. 3%
D. 25%
9. The armature of a DC motor is responsible for:
A. Speed control
B. Torque generation
C. Field excitation
D. Counterweight tension
10. A megohmmeter is used to test:
A. Voltage
B. Power factor
C. Insulation resistance
D. Brake pressure
SECTION 2 — HYDRAULIC SYSTEMS (21–40)
21. The main purpose of a rupture valve is to:
A. Control oil temperature
B. Stop downward motion in case of pipe failure
,C. Increase pump pressure
D. Vent air
22. Hydraulic elevators commonly operate at pressures up to:
A. 100 PSI
B. 300 PSI
C. 500 PSI
D. 900 PSI
23. A spongy or bouncy hydraulic ride usually indicates:
A. Overheated oil
B. Pump failure
C. Air in the system
D. Incorrect piston diameter
24. The leveling accuracy of a hydraulic elevator is achieved by:
A. Pump speed
B. Valve control
C. Counterweight
D. Tachometer
25. A leaking packing gland generally causes:
A. Overspeed
B. Oil loss
C. High pressure spikes
D. Motor burnout
26. The down direction of a hydraulic elevator is achieved by:
A. Pump running in reverse
B. Pump speed adjustment
C. Valve opening
D. Counterweighting
SECTION 3 — TRACTION SYSTEMS (41–60)
41. Traction is produced by friction between:
A. Guide shoes and rails
B. Rope and sheave
, C. Brake and drum
D. Counterweight and frame
42. The purpose of the governor is to:
A. Stop the car leveling
B. Detect overspeed
C. Monitor door position
D. Control power usage
43. Rope slippage is usually caused by:
A. Too much lubrication
B. Worn sheave grooves
C. Cold weather
D. Oversized counterweight
44. A safety gear activates when:
A. Motor overheats
B. Governor trips
C. Door is obstructed
D. Controller shuts down
45. The preferred rope lubrication condition is:
A. Wet
B. Dry
C. Slightly lubricated
D. Fully saturated
SECTION 4 — CONTROLS & CIRCUITS (61–80)
61. A limit switch is used to:
A. Control hall call sequence
B. Stop travel at set points
C. Detect rope wear
D. Test load capacity
62. A relay coil energizes when:
A. Voltage is applied
B. Current drops to zero
QUESTIONS & ANSWERS
(All questions are unique and safe for
study use.)
SECTION 1 — ELECTRICITY & MOTORS (1–20)
1. Which component controls the speed of an AC elevator motor?
A. Contactor
B. VVVF drive
C. Limit switch
D. Tachometer
2. The main purpose of an overload relay in an elevator motor circuit is to:
A. Increase motor torque
B. Prevent overspeed
C. Protect the motor from excessive current
D. Control direction
3. A motor draws high current during startup because:
A. Voltage is too high
B. Rotor is initially stationary
C. Slip is zero
D. Frequency is reduced
4. Which wiring method is required for traveling cables?
A. EMT
B. Flexible tray cable
C. BX cable
D. Ridgid conduit
5. A 3-phase motor that hums but does not rotate likely indicates:
A. Open ground
,B. One phase is lost
C. Overvoltage
D. A worn bearing
6. The tachometer on an elevator is used to:
A. Count door cycles
B. Measure car position
C. Monitor motor speed
D. Control leveling
7. Regen drives return energy to:
A. Battery backup
B. The building AC supply
C. The counterweight
D. The machine brake
8. Line voltage imbalance between phases must be within:
A. 15%
B. 10%
C. 3%
D. 25%
9. The armature of a DC motor is responsible for:
A. Speed control
B. Torque generation
C. Field excitation
D. Counterweight tension
10. A megohmmeter is used to test:
A. Voltage
B. Power factor
C. Insulation resistance
D. Brake pressure
SECTION 2 — HYDRAULIC SYSTEMS (21–40)
21. The main purpose of a rupture valve is to:
A. Control oil temperature
B. Stop downward motion in case of pipe failure
,C. Increase pump pressure
D. Vent air
22. Hydraulic elevators commonly operate at pressures up to:
A. 100 PSI
B. 300 PSI
C. 500 PSI
D. 900 PSI
23. A spongy or bouncy hydraulic ride usually indicates:
A. Overheated oil
B. Pump failure
C. Air in the system
D. Incorrect piston diameter
24. The leveling accuracy of a hydraulic elevator is achieved by:
A. Pump speed
B. Valve control
C. Counterweight
D. Tachometer
25. A leaking packing gland generally causes:
A. Overspeed
B. Oil loss
C. High pressure spikes
D. Motor burnout
26. The down direction of a hydraulic elevator is achieved by:
A. Pump running in reverse
B. Pump speed adjustment
C. Valve opening
D. Counterweighting
SECTION 3 — TRACTION SYSTEMS (41–60)
41. Traction is produced by friction between:
A. Guide shoes and rails
B. Rope and sheave
, C. Brake and drum
D. Counterweight and frame
42. The purpose of the governor is to:
A. Stop the car leveling
B. Detect overspeed
C. Monitor door position
D. Control power usage
43. Rope slippage is usually caused by:
A. Too much lubrication
B. Worn sheave grooves
C. Cold weather
D. Oversized counterweight
44. A safety gear activates when:
A. Motor overheats
B. Governor trips
C. Door is obstructed
D. Controller shuts down
45. The preferred rope lubrication condition is:
A. Wet
B. Dry
C. Slightly lubricated
D. Fully saturated
SECTION 4 — CONTROLS & CIRCUITS (61–80)
61. A limit switch is used to:
A. Control hall call sequence
B. Stop travel at set points
C. Detect rope wear
D. Test load capacity
62. A relay coil energizes when:
A. Voltage is applied
B. Current drops to zero
