Certified Escalator Maintenance Technician
Exam Questions With Correct Answers (Verified
Answers) Plus Rationales 2026 Q&A | Instant
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1. What is the primary purpose of an escalator step chain?
A. To power the handrail
B. To connect and move the steps in a continuous loop
C. To control braking speed
D. To regulate electrical flow
Answer: B
Rationale: The step chain is a critical mechanical component that links
escalator steps together and drives their synchronized movement
along the track system. It ensures continuous circulation of steps
between the upper and lower landings.
2. Which component primarily prevents an escalator from running in
reverse unintentionally?
A. Handrail drive
,B. Comb plate
C. Anti-reversal device
D. Skirt panel
Answer: C
Rationale: The anti-reversal device ensures that the escalator does not
move backward due to load imbalance or mechanical failure,
enhancing passenger safety.
3. What is the function of the comb plate at escalator landings?
A. To guide passengers onto and off steps safely
B. To power the motor
C. To lubricate step chains
D. To adjust step height
Answer: A
Rationale: The comb plate acts as a transition point between the
moving steps and stationary flooring, reducing tripping hazards during
boarding and alighting.
4. What type of motor is commonly used in escalator systems?
A. Hydraulic motor
B. Diesel engine
,C. Electric induction motor
D. Solar motor
Answer: C
Rationale: Electric induction motors are preferred due to their
reliability, efficiency, and ability to handle continuous heavy-duty
operation.
5. What is the main function of the handrail system?
A. To stabilize passengers while riding
B. To carry electrical wiring
C. To control escalator speed
D. To support the step chain
Answer: A
Rationale: The handrail provides stability and balance for passengers,
moving in synchronization with the steps.
6. What safety device stops an escalator if a foreign object is detected
in the step area?
A. Skirt switch
B. Comb switch
C. Step chain
, D. Brake drum
Answer: B
Rationale: The comb switch detects obstruction at the comb plate area
and stops the escalator to prevent injury or damage.
7. What is the function of the escalator brake system?
A. To increase speed during peak hours
B. To stop or hold the escalator when powered off
C. To lubricate moving parts
D. To align steps
Answer: B
Rationale: The brake system ensures controlled stopping and holds the
escalator stationary when not in operation.
8. Which part connects the motor to the step drive system?
A. Gear reducer
B. Skirt brush
C. Comb plate
D. Step tread
Answer: A
Exam Questions With Correct Answers (Verified
Answers) Plus Rationales 2026 Q&A | Instant
Download Pdf
1. What is the primary purpose of an escalator step chain?
A. To power the handrail
B. To connect and move the steps in a continuous loop
C. To control braking speed
D. To regulate electrical flow
Answer: B
Rationale: The step chain is a critical mechanical component that links
escalator steps together and drives their synchronized movement
along the track system. It ensures continuous circulation of steps
between the upper and lower landings.
2. Which component primarily prevents an escalator from running in
reverse unintentionally?
A. Handrail drive
,B. Comb plate
C. Anti-reversal device
D. Skirt panel
Answer: C
Rationale: The anti-reversal device ensures that the escalator does not
move backward due to load imbalance or mechanical failure,
enhancing passenger safety.
3. What is the function of the comb plate at escalator landings?
A. To guide passengers onto and off steps safely
B. To power the motor
C. To lubricate step chains
D. To adjust step height
Answer: A
Rationale: The comb plate acts as a transition point between the
moving steps and stationary flooring, reducing tripping hazards during
boarding and alighting.
4. What type of motor is commonly used in escalator systems?
A. Hydraulic motor
B. Diesel engine
,C. Electric induction motor
D. Solar motor
Answer: C
Rationale: Electric induction motors are preferred due to their
reliability, efficiency, and ability to handle continuous heavy-duty
operation.
5. What is the main function of the handrail system?
A. To stabilize passengers while riding
B. To carry electrical wiring
C. To control escalator speed
D. To support the step chain
Answer: A
Rationale: The handrail provides stability and balance for passengers,
moving in synchronization with the steps.
6. What safety device stops an escalator if a foreign object is detected
in the step area?
A. Skirt switch
B. Comb switch
C. Step chain
, D. Brake drum
Answer: B
Rationale: The comb switch detects obstruction at the comb plate area
and stops the escalator to prevent injury or damage.
7. What is the function of the escalator brake system?
A. To increase speed during peak hours
B. To stop or hold the escalator when powered off
C. To lubricate moving parts
D. To align steps
Answer: B
Rationale: The brake system ensures controlled stopping and holds the
escalator stationary when not in operation.
8. Which part connects the motor to the step drive system?
A. Gear reducer
B. Skirt brush
C. Comb plate
D. Step tread
Answer: A
