Examination Questions And Correct
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Question 1
What is the primary purpose of the governor in a traction elevator system?
A. Control the car speed during normal passenger operation
B. Detect overspeed conditions and activate the safety mechanism to stop the car
C. Regulate the operation of the car and hall doors
D. Control the motor start sequence during initial power-up
Answer: B
Rationale: The governor is a critical safety device that detects overspeed
conditions in a traction elevator. When the car exceeds a predetermined speed,
the governor trips and activates the safety gear, which mechanically stops the
car. This prevents dangerous overspeed conditions that could lead to injury or
equipment damage .
Question 2
According to ASME A17.1, how often must traction elevators undergo a full-load
safety test?
A. Every 6 months
B. Every year
C. Every 5 years
D. Only after initial installation
,Answer: B
Rationale: ASME A17.1 requires annual full-load safety tests for traction
elevators. These tests verify that the elevator's braking and safety mechanisms
function properly under maximum rated load conditions. Annual testing is
essential to ensure passenger safety and regulatory compliance .
Question 3
What is the function of the car buffer in an elevator system?
A. Prevent the car from overspeeding
B. Absorb energy if the car descends too far past the lowest landing
C. Limit lateral sway during high-speed operation
D. Assist in leveling the car at floor landings
Answer: B
Rationale: Car buffers are safety devices located in the pit that absorb energy
and bring the car to a controlled stop if it travels past the lowest landing. This
protects passengers and equipment from impact forces in an overtravel event .
Question 4
What is the minimum required safety factor for traction hoist ropes according to
ASME A17.1?
A. 3:1
B. 5:1
C. 7:1
D. 10:1
Answer: C
Rationale: ASME A17.1 mandates a minimum safety factor of 7:1 for traction
hoist ropes used in passenger elevators. This safety factor ensures that the ropes
have adequate strength to safely support the car and its load under all
operating conditions .
Question 5
What is the primary function of the car door restrictor?
,A. Slow the operation of the car door during closing
B. Prevent the doors from opening unless the car is at a landing
C. Operate the hall call indicator lights
D. Assist in leveling the car at floor landings
Answer: B
Rationale: The car door restrictor is a safety mechanism that prevents the car
doors from opening when the car is not positioned at a landing. This protects
passengers from falling into the hoistway and is a critical safety feature during
inspections .
Question 6
Which of the following is a key inspection item for a traction elevator governor?
A. Rope tension only
B. Tripping speed and rope condition
C. Brake pad color and thickness
D. Door interlock function
Answer: B
Rationale: Inspectors must verify that the governor trips at the rated overspeed
and that the governor rope and sheave are in good condition. The tripping speed
ensures proper activation of the safety gear, while rope condition prevents
mechanical failure .
Question 7
What is the purpose of the car top inspection station?
A. Operate the elevator remotely from the machine room
B. Provide safety and control for maintenance personnel working on top of the car
C. Measure leveling accuracy at floor landings
D. Control door speed during normal operation
Answer: B
Rationale: The car top inspection station allows maintenance personnel to safely
operate the elevator while working on top of the car. It includes controls for
movement and an emergency stop function to protect workers .
, Question 8
What is the main purpose of the safety edge on a car door?
A. Reduce noise during door operation
B. Reverse the door if an obstruction is detected
C. Indicate door position to the controller
D. Assist in leveling the car at the landing
Answer: B
Rationale: Safety edges detect objects or passengers in the doorway and reverse
the door to prevent injury. This is a critical passenger safety feature required by
ASME A17.1 .
Question 9
What type of elevator uses ropes over a traction sheave and a counterweight to
move the car?
A. Hydraulic
B. Traction
C. Pneumatic
D. Machine room-less (MRL)
Answer: B
Rationale: Traction elevators use ropes that pass over a traction sheave with a
counterweight to balance the car. This is the most common type of elevator in
high-rise buildings and provides efficient operation for tall structures .
Question 10
What is the primary function of the overspeed switch on a hydraulic elevator?
A. Detect excessive flow to the piston
B. Reverse door operation during obstruction
C. Monitor leveling accuracy at landings
D. Control the car interior lighting system
Answer: A
Rationale: Overspeed switches on hydraulic elevators detect abnormal hydraulic