ELEVATOR MECHANIC EXAM – QUESTIONS AND ANSWERS | VERIFIED AND WELL DETAILED ANSWERS | PLUS
RATIONALES | GUARANTEED PASS | LATEST EXAM UPDATE
Core Domains
Assembling and Installing Passenger and Freight Elevators
Maintaining, Repairing, and Modernizing Elevator Systems
Assembling, Installing, Maintaining, and Repairing Escalators and Moving Walks
Electrical Theory and Application (AC/DC Motors, Controllers, and Drives)
Hydraulic Elevator Systems and Components
Rigging, Hoisting, and Load Calculations
Codes and Standards (ASME A17.1/CSA B44, NEC Article 620)
Safety Procedures (OSHA, LOTO, Confined Space, PPE)
Troubleshooting and Diagnostic Procedures
Professional Standards and Ethical Practices
Introduction
This comprehensive examination is designed to assess the knowledge and practical skills required of a professional
elevator mechanic. The exam covers a broad spectrum of competencies, from fundamental electrical theory and
mechanical principles to complex troubleshooting and adherence to strict safety codes. Candidates will be evaluated
through a combination of multiple-choice questions and scenario-based problems that mirror real-world challenges
faced in the field. The assessment emphasizes the application of technical knowledge, critical thinking, and professional
decision-making essential for ensuring the safe and efficient operation of vertical transportation systems. Mastery of
these domains is critical for public safety and professional success.
Question 1
What is the primary purpose of a check valve in a hydraulic elevator system?
A. To control the descent speed of the car
,B. To prevent the car from dropping if the main power fails
C. To filter contaminants from the hydraulic fluid
D. To maintain pressure and prevent the car from sinking when parked
🟢 Correct Answer: D. To maintain pressure and prevent the car from sinking when parked
🔴 Explanation: The check valve acts as a one-way valve. It allows oil to flow from the pump to the cylinder to raise
the car, but prevents oil from flowing back when the pump is off, thus holding the car at the landing . While a failed
check valve can cause the car to sink, its primary function is to maintain holding pressure.
Question 2
A motor running at 600 RPM drives a generator with 4 poles. What is the output frequency?
A. 10 Hz
B. 15 Hz
C. 20 Hz
D. 25 Hz
🟢 Correct Answer: C. 20 Hz
🔴 Explanation: The frequency of an AC generator is determined by the formula: Frequency (Hz) = (RPM × Number
of Pole Pairs) / 60. For a 4-pole machine, there are 2 pole pairs. Therefore, Frequency = (600 RPM × 2) / 60 = 20 Hz .
Question 3
When working on a freight door retiring cam, you have locked out and tagged out the main line disconnect, but
there is still power to the cam. What is the likely source of this power?
A. A separate battery backup system
B. A capacitor discharge circuit
C. A separate door operator disconnect
D. An ungrounded neutral conductor
🟢 Correct Answer: C. A separate door operator disconnect
🔴 Explanation: In many freight elevator installations, the door operator is fed from a separate power source or a
,separate disconnect switch that is independent of the main elevator disconnect. This allows for door maintenance or
troubleshooting without shutting down the entire elevator system .
Question 4
A car with a selective collective controller is moving to the lobby to answer a hall call. A new up hall call is registered
at the second floor. What is the controller's response?
A. The car will reverse direction immediately to answer the up call
B. The car will register the call and answer it before continuing to the lobby
C. The call will be bypassed and answered only when the car is traveling in the up direction
D. The car will stop at the second floor on its way down to the lobby
🟢 Correct Answer: C. The call will be bypassed and answered only when the car is traveling in the up direction
🔴 Explanation: A selective collective system answers hall calls in the direction it is traveling. As the car is traveling
down to the lobby, it will ignore up hall calls. It will process all down calls first, then reverse direction and answer the
up calls on its way up .
Question 5
What is the required minimum clearance between two controllers placed face-to-face in a small machine room?
A. 24 inches
B. 30 inches
C. 36 inches
D. 48 inches
🟢 Correct Answer: C. 36 inches
🔴 Explanation: Building and safety codes, such as the ASME A17.1/CSA B44, typically mandate a minimum working
clearance of 36 inches in front of electrical equipment, including controllers, to ensure safe access for maintenance
and emergency response .
Question 6
The step level switch on an escalator has been activated. Where must you check to reset and investigate the issue?
, A. Only at the top drive station
B. Only at the bottom return station
C. At both the top and bottom stations
D. In the middle of the incline
🟢 Correct Answer: C. At both the top and bottom stations
🔴 Explanation: The step level switch is designed to detect if a step is out of alignment or has dropped more than
1/8". This switch is typically located at both the top and bottom of the escalator to monitor the step chain as it
transitions around the drive and return sprockets. It is a manual-reset safety device .
Question 7
During a static load test with the pit valve in the closed position, the car sinks 6 inches in 15 minutes. What is the
most likely cause?
A. A faulty up valve
B. A leaking cylinder or piston seal
C. An incorrectly set relief valve
D. Air in the hydraulic system
🟢 Correct Answer: B. A leaking cylinder or piston seal
🔴 Explanation: With the pit valve closed, the car sinking indicates that hydraulic fluid is bypassing the piston seal or
escaping from a leak in the cylinder itself. If the valve were faulty, the oil would flow back through the valve. An
unexposed cylinder is tested annually for such leaks .
Question 8
How should a fire extinguisher be aimed when putting out a fire?
A. At the top of the flames
B. At the center of the fire
C. At the base of the fire
D. In a sweeping motion above the fire
RATIONALES | GUARANTEED PASS | LATEST EXAM UPDATE
Core Domains
Assembling and Installing Passenger and Freight Elevators
Maintaining, Repairing, and Modernizing Elevator Systems
Assembling, Installing, Maintaining, and Repairing Escalators and Moving Walks
Electrical Theory and Application (AC/DC Motors, Controllers, and Drives)
Hydraulic Elevator Systems and Components
Rigging, Hoisting, and Load Calculations
Codes and Standards (ASME A17.1/CSA B44, NEC Article 620)
Safety Procedures (OSHA, LOTO, Confined Space, PPE)
Troubleshooting and Diagnostic Procedures
Professional Standards and Ethical Practices
Introduction
This comprehensive examination is designed to assess the knowledge and practical skills required of a professional
elevator mechanic. The exam covers a broad spectrum of competencies, from fundamental electrical theory and
mechanical principles to complex troubleshooting and adherence to strict safety codes. Candidates will be evaluated
through a combination of multiple-choice questions and scenario-based problems that mirror real-world challenges
faced in the field. The assessment emphasizes the application of technical knowledge, critical thinking, and professional
decision-making essential for ensuring the safe and efficient operation of vertical transportation systems. Mastery of
these domains is critical for public safety and professional success.
Question 1
What is the primary purpose of a check valve in a hydraulic elevator system?
A. To control the descent speed of the car
,B. To prevent the car from dropping if the main power fails
C. To filter contaminants from the hydraulic fluid
D. To maintain pressure and prevent the car from sinking when parked
🟢 Correct Answer: D. To maintain pressure and prevent the car from sinking when parked
🔴 Explanation: The check valve acts as a one-way valve. It allows oil to flow from the pump to the cylinder to raise
the car, but prevents oil from flowing back when the pump is off, thus holding the car at the landing . While a failed
check valve can cause the car to sink, its primary function is to maintain holding pressure.
Question 2
A motor running at 600 RPM drives a generator with 4 poles. What is the output frequency?
A. 10 Hz
B. 15 Hz
C. 20 Hz
D. 25 Hz
🟢 Correct Answer: C. 20 Hz
🔴 Explanation: The frequency of an AC generator is determined by the formula: Frequency (Hz) = (RPM × Number
of Pole Pairs) / 60. For a 4-pole machine, there are 2 pole pairs. Therefore, Frequency = (600 RPM × 2) / 60 = 20 Hz .
Question 3
When working on a freight door retiring cam, you have locked out and tagged out the main line disconnect, but
there is still power to the cam. What is the likely source of this power?
A. A separate battery backup system
B. A capacitor discharge circuit
C. A separate door operator disconnect
D. An ungrounded neutral conductor
🟢 Correct Answer: C. A separate door operator disconnect
🔴 Explanation: In many freight elevator installations, the door operator is fed from a separate power source or a
,separate disconnect switch that is independent of the main elevator disconnect. This allows for door maintenance or
troubleshooting without shutting down the entire elevator system .
Question 4
A car with a selective collective controller is moving to the lobby to answer a hall call. A new up hall call is registered
at the second floor. What is the controller's response?
A. The car will reverse direction immediately to answer the up call
B. The car will register the call and answer it before continuing to the lobby
C. The call will be bypassed and answered only when the car is traveling in the up direction
D. The car will stop at the second floor on its way down to the lobby
🟢 Correct Answer: C. The call will be bypassed and answered only when the car is traveling in the up direction
🔴 Explanation: A selective collective system answers hall calls in the direction it is traveling. As the car is traveling
down to the lobby, it will ignore up hall calls. It will process all down calls first, then reverse direction and answer the
up calls on its way up .
Question 5
What is the required minimum clearance between two controllers placed face-to-face in a small machine room?
A. 24 inches
B. 30 inches
C. 36 inches
D. 48 inches
🟢 Correct Answer: C. 36 inches
🔴 Explanation: Building and safety codes, such as the ASME A17.1/CSA B44, typically mandate a minimum working
clearance of 36 inches in front of electrical equipment, including controllers, to ensure safe access for maintenance
and emergency response .
Question 6
The step level switch on an escalator has been activated. Where must you check to reset and investigate the issue?
, A. Only at the top drive station
B. Only at the bottom return station
C. At both the top and bottom stations
D. In the middle of the incline
🟢 Correct Answer: C. At both the top and bottom stations
🔴 Explanation: The step level switch is designed to detect if a step is out of alignment or has dropped more than
1/8". This switch is typically located at both the top and bottom of the escalator to monitor the step chain as it
transitions around the drive and return sprockets. It is a manual-reset safety device .
Question 7
During a static load test with the pit valve in the closed position, the car sinks 6 inches in 15 minutes. What is the
most likely cause?
A. A faulty up valve
B. A leaking cylinder or piston seal
C. An incorrectly set relief valve
D. Air in the hydraulic system
🟢 Correct Answer: B. A leaking cylinder or piston seal
🔴 Explanation: With the pit valve closed, the car sinking indicates that hydraulic fluid is bypassing the piston seal or
escaping from a leak in the cylinder itself. If the valve were faulty, the oil would flow back through the valve. An
unexposed cylinder is tested annually for such leaks .
Question 8
How should a fire extinguisher be aimed when putting out a fire?
A. At the top of the flames
B. At the center of the fire
C. At the base of the fire
D. In a sweeping motion above the fire
