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Ontario Elevating Devices Mechanic (EDM-B)
Certification Exam ACTUAL EXAM COMPLETE
QUESTIONS AND CORRECT ANSWERS LATEST
UPDATE THIS YEAR
Ontario Elevating Devices Mechanic (EDM-B) Certification Exam – Practice Guide
Technical Standards and Safety Authority
This exam is regulated in Ontario and focuses on elevators, escalators, and lifting devices, combining
theory, code knowledge, and real-world troubleshooting.
ACTUAL EXAM COVERAGE (ALL CONTENTS TESTED)
1. Elevating Device Fundamentals
• Types: traction elevators, hydraulic elevators, escalators, moving walks
• Components: hoistway, car, counterweight, guide rails
• Machine room vs machine-room-less (MRL) systems
2. Electrical Systems
• Motors (AC/DC, variable frequency drives)
• Controllers and relays
• Wiring diagrams and schematics
• Safety circuits and interlocks
3. Mechanical Systems
• Hoisting systems (ropes, sheaves, drums)
• Hydraulic systems (pumps, cylinders, valves)
• Brakes and governors
• Bearings and lubrication
4. Codes & Standards
• CSA B44 Safety Code for Elevators and Escalators
• Ontario regulations and TSSA requirements
• Inspection procedures and compliance
5. Safety Systems
• Door interlocks and safety edges
• Overspeed governors
• Emergency brakes
• Buffer systems
6. Installation & Maintenance
• Alignment and leveling
• Preventive maintenance schedules
• Troubleshooting procedures
• Testing and commissioning
7. Troubleshooting & Diagnostics
• Fault isolation using schematics
• Electrical and mechanical failures
• Sensor and limit switch issues
8. Workplace Safety
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• Lockout/tagout (LOTO)
• Fall protection
• Confined space safety
• Hazard identification
1.
A traction elevator experiences slipping of hoist ropes under load during upward travel. What is the
most likely cause?
A. Excess lubrication on rails
B. Insufficient traction between ropes and sheave
C. Faulty door interlock
D. Broken buffer
Answer: B
Rationale: Traction depends on friction between ropes and sheave; loss causes slipping.
2.
During inspection, a door interlock fails to prevent elevator movement when doors are open. What is
the primary safety concern?
A. Reduced speed
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B. Passenger fall hazard
C. Increased efficiency
D. Reduced maintenance
Answer: B
3.
A hydraulic elevator shows slow upward movement with normal motor operation. What is the likely
issue?
A. Excess rope tension
B. Hydraulic fluid leakage or low pressure
C. Faulty governor
D. Door misalignment
Answer: B
4.
A technician reads a wiring diagram and identifies an open circuit in a safety loop. What is the expected
system response?
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A. Elevator continues running
B. Elevator stops immediately
C. Increased speed
D. Reduced load
Answer: B
5.
A traction elevator overspeeds during descent. Which safety device should activate?
A. Door operator
B. Overspeed governor and safety gear
C. Counterweight
D. Buffer springs
Answer: B
6.
A motor control system uses a variable frequency drive (VFD). What is its primary function?
A. Increase friction
Ontario Elevating Devices Mechanic (EDM-B)
Certification Exam ACTUAL EXAM COMPLETE
QUESTIONS AND CORRECT ANSWERS LATEST
UPDATE THIS YEAR
Ontario Elevating Devices Mechanic (EDM-B) Certification Exam – Practice Guide
Technical Standards and Safety Authority
This exam is regulated in Ontario and focuses on elevators, escalators, and lifting devices, combining
theory, code knowledge, and real-world troubleshooting.
ACTUAL EXAM COVERAGE (ALL CONTENTS TESTED)
1. Elevating Device Fundamentals
• Types: traction elevators, hydraulic elevators, escalators, moving walks
• Components: hoistway, car, counterweight, guide rails
• Machine room vs machine-room-less (MRL) systems
2. Electrical Systems
• Motors (AC/DC, variable frequency drives)
• Controllers and relays
• Wiring diagrams and schematics
• Safety circuits and interlocks
3. Mechanical Systems
• Hoisting systems (ropes, sheaves, drums)
• Hydraulic systems (pumps, cylinders, valves)
• Brakes and governors
• Bearings and lubrication
4. Codes & Standards
• CSA B44 Safety Code for Elevators and Escalators
• Ontario regulations and TSSA requirements
• Inspection procedures and compliance
5. Safety Systems
• Door interlocks and safety edges
• Overspeed governors
• Emergency brakes
• Buffer systems
6. Installation & Maintenance
• Alignment and leveling
• Preventive maintenance schedules
• Troubleshooting procedures
• Testing and commissioning
7. Troubleshooting & Diagnostics
• Fault isolation using schematics
• Electrical and mechanical failures
• Sensor and limit switch issues
8. Workplace Safety
, Page 2 of 104
• Lockout/tagout (LOTO)
• Fall protection
• Confined space safety
• Hazard identification
1.
A traction elevator experiences slipping of hoist ropes under load during upward travel. What is the
most likely cause?
A. Excess lubrication on rails
B. Insufficient traction between ropes and sheave
C. Faulty door interlock
D. Broken buffer
Answer: B
Rationale: Traction depends on friction between ropes and sheave; loss causes slipping.
2.
During inspection, a door interlock fails to prevent elevator movement when doors are open. What is
the primary safety concern?
A. Reduced speed
, Page 3 of 104
B. Passenger fall hazard
C. Increased efficiency
D. Reduced maintenance
Answer: B
3.
A hydraulic elevator shows slow upward movement with normal motor operation. What is the likely
issue?
A. Excess rope tension
B. Hydraulic fluid leakage or low pressure
C. Faulty governor
D. Door misalignment
Answer: B
4.
A technician reads a wiring diagram and identifies an open circuit in a safety loop. What is the expected
system response?
, Page 4 of 104
A. Elevator continues running
B. Elevator stops immediately
C. Increased speed
D. Reduced load
Answer: B
5.
A traction elevator overspeeds during descent. Which safety device should activate?
A. Door operator
B. Overspeed governor and safety gear
C. Counterweight
D. Buffer springs
Answer: B
6.
A motor control system uses a variable frequency drive (VFD). What is its primary function?
A. Increase friction
