Ontario Elevating Devices Mechanic (EDM-B)
Certification Exam Questions And Correct
Answers (Verified Answers) Plus Rationales
2026 Q&A | Instant Download Pdf
1. What is the primary responsibility of an Elevating Devices
Mechanic (EDM-B)?
A. Designing elevator systems
B. Installing, maintaining, and repairing elevating devices
C. Approving building permits
D. Operating elevators for passengers
Answer: B
EDM-B mechanics are responsible for installation, maintenance,
inspection, testing, and repair of elevating devices.
2. Which regulation governs elevating devices in Ontario?
A. Occupational Health and Safety Act only
B. Electrical Safety Code
C. Technical Standards and Safety Act (TSSA regulations)
D. Building Code Act only
Answer: C
Elevating devices fall under the Technical Standards and Safety Act and
associated TSSA regulations.
, 3. Before beginning work on an elevator, the mechanic must first:
A. Notify the building tenants
B. Shut down the main power and lock out
C. Remove the car from service signage
D. Call the manufacturer
Answer: B
Lockout and verification of zero energy is required before work begins.
4. What device prevents an elevator car from moving with doors
open?
A. Governor
B. Door interlock
C. Buffer
D. Limit switch
Answer: B
Door interlocks ensure the car cannot operate unless doors are closed
and locked.
5. Which component limits elevator car speed?
A. Brake coil
B. Controller
C. Governor
D. Selector
Answer: C
The governor monitors overspeed conditions and activates safety
devices.
, 6. What is the purpose of elevator buffers?
A. Reduce electrical load
B. Absorb impact at the bottom of the hoistway
C. Stop door movement
D. Control leveling
Answer: B
Buffers protect occupants and equipment if the car travels beyond its
normal limit.
7. Which type of buffer is commonly used in high-speed elevators?
A. Spring buffer
B. Rubber buffer
C. Oil (hydraulic) buffer
D. Air buffer
Answer: C
Oil buffers are designed for high-speed applications due to superior
energy absorption.
8. What is the function of the counterweight?
A. Increase elevator speed
B. Balance the car load
C. Support guide rails
D. Control door timing
, Answer: B
Counterweights reduce motor load and improve system efficiency.
9. Elevator guide rails are primarily used to:
A. Carry electrical wiring
B. Support hoist ropes
C. Guide car and counterweight travel
D. Control door operation
Answer: C
Guide rails keep the car and counterweight aligned in the hoistway.
10. What safety device stops the car if it overspeeds downward?
A. Door operator
B. Brake magnet
C. Safety jaws
D. Selector switch
Answer: C
Safety jaws grip the guide rails when activated by the governor.
11. Which power supply commonly feeds elevator control
circuits?
A. 600 V AC
B. 480 V AC only
C. Low-voltage control power (typically 120 V or less)
D. DC battery only
Certification Exam Questions And Correct
Answers (Verified Answers) Plus Rationales
2026 Q&A | Instant Download Pdf
1. What is the primary responsibility of an Elevating Devices
Mechanic (EDM-B)?
A. Designing elevator systems
B. Installing, maintaining, and repairing elevating devices
C. Approving building permits
D. Operating elevators for passengers
Answer: B
EDM-B mechanics are responsible for installation, maintenance,
inspection, testing, and repair of elevating devices.
2. Which regulation governs elevating devices in Ontario?
A. Occupational Health and Safety Act only
B. Electrical Safety Code
C. Technical Standards and Safety Act (TSSA regulations)
D. Building Code Act only
Answer: C
Elevating devices fall under the Technical Standards and Safety Act and
associated TSSA regulations.
, 3. Before beginning work on an elevator, the mechanic must first:
A. Notify the building tenants
B. Shut down the main power and lock out
C. Remove the car from service signage
D. Call the manufacturer
Answer: B
Lockout and verification of zero energy is required before work begins.
4. What device prevents an elevator car from moving with doors
open?
A. Governor
B. Door interlock
C. Buffer
D. Limit switch
Answer: B
Door interlocks ensure the car cannot operate unless doors are closed
and locked.
5. Which component limits elevator car speed?
A. Brake coil
B. Controller
C. Governor
D. Selector
Answer: C
The governor monitors overspeed conditions and activates safety
devices.
, 6. What is the purpose of elevator buffers?
A. Reduce electrical load
B. Absorb impact at the bottom of the hoistway
C. Stop door movement
D. Control leveling
Answer: B
Buffers protect occupants and equipment if the car travels beyond its
normal limit.
7. Which type of buffer is commonly used in high-speed elevators?
A. Spring buffer
B. Rubber buffer
C. Oil (hydraulic) buffer
D. Air buffer
Answer: C
Oil buffers are designed for high-speed applications due to superior
energy absorption.
8. What is the function of the counterweight?
A. Increase elevator speed
B. Balance the car load
C. Support guide rails
D. Control door timing
, Answer: B
Counterweights reduce motor load and improve system efficiency.
9. Elevator guide rails are primarily used to:
A. Carry electrical wiring
B. Support hoist ropes
C. Guide car and counterweight travel
D. Control door operation
Answer: C
Guide rails keep the car and counterweight aligned in the hoistway.
10. What safety device stops the car if it overspeeds downward?
A. Door operator
B. Brake magnet
C. Safety jaws
D. Selector switch
Answer: C
Safety jaws grip the guide rails when activated by the governor.
11. Which power supply commonly feeds elevator control
circuits?
A. 600 V AC
B. 480 V AC only
C. Low-voltage control power (typically 120 V or less)
D. DC battery only
