DIR – Elevator Mechanic Certification
Examination Questions and Correct Answers
(Verified Answers) Plus Rationale 2027 Q&A|
Instant Download Pdf
Question 1
What is the primary purpose of an elevator governor?
A. To increase car speed during normal operation
B. To control door opening speed
C. To detect overspeed and initiate the safety system
D. To regulate hydraulic pressure
Rationale: The governor monitors elevator car speed. If the car
reaches an unsafe overspeed condition, the governor activates a
mechanism that causes the car safety device to engage and help stop
the car.
Question 2
,Which component normally supports the elevator car through
suspension ropes?
A. Door operator
B. Governor
C. Sheave and suspension system
D. Traveling cable
Rationale: Suspension ropes pass over the drive sheave and connect
the car and counterweight in a conventional traction elevator. The
suspension system transfers the lifting force to the car.
Question 3
What is the primary function of an elevator counterweight?
A. Increase door closing force
B. Provide emergency lighting
C. Balance a portion of the car and load weight
D. Prevent electrical faults
Rationale: The counterweight reduces the amount of motor power
required to move the elevator. It normally balances the car weight
plus a specified portion of the rated load.
Question 4
,Before performing electrical maintenance on an elevator, what should
be done first?
A. Increase the motor speed
B. Open the car doors
C. De-energize, isolate, and lock/tag the energy source as required
D. Remove the governor rope
Rationale: Lockout/tagout helps prevent unexpected energization
while work is being performed. The mechanic must identify and
control hazardous energy before beginning maintenance.
Question 5
Which device is designed to interrupt power to the elevator when an
unsafe condition occurs?
A. Guide shoe
B. Sheave
C. Safety switch
D. Counterweight
Rationale: Safety switches are incorporated into elevator control and
safety circuits to interrupt operation when specified unsafe conditions
are detected.
Question 6
, What is the purpose of guide rails in a traction elevator?
A. Supply power to the motor
B. Support the building structure
C. Guide the car and counterweight vertically
D. Operate the door locks
Rationale: Guide rails provide a controlled path for the elevator car
and counterweight. They also provide the surface against which the
car safety device can act.
Question 7
Which component changes the rotational motion of the hoist machine
into movement of the elevator car?
A. Door restrictor
B. Drive sheave and suspension system
C. Interlock
D. Governor switch
Rationale: In a traction elevator, the motor turns the drive sheave.
Friction between the sheave and suspension ropes produces the
traction needed to move the car and counterweight.
Question 8
What is the primary purpose of an elevator door interlock?
Examination Questions and Correct Answers
(Verified Answers) Plus Rationale 2027 Q&A|
Instant Download Pdf
Question 1
What is the primary purpose of an elevator governor?
A. To increase car speed during normal operation
B. To control door opening speed
C. To detect overspeed and initiate the safety system
D. To regulate hydraulic pressure
Rationale: The governor monitors elevator car speed. If the car
reaches an unsafe overspeed condition, the governor activates a
mechanism that causes the car safety device to engage and help stop
the car.
Question 2
,Which component normally supports the elevator car through
suspension ropes?
A. Door operator
B. Governor
C. Sheave and suspension system
D. Traveling cable
Rationale: Suspension ropes pass over the drive sheave and connect
the car and counterweight in a conventional traction elevator. The
suspension system transfers the lifting force to the car.
Question 3
What is the primary function of an elevator counterweight?
A. Increase door closing force
B. Provide emergency lighting
C. Balance a portion of the car and load weight
D. Prevent electrical faults
Rationale: The counterweight reduces the amount of motor power
required to move the elevator. It normally balances the car weight
plus a specified portion of the rated load.
Question 4
,Before performing electrical maintenance on an elevator, what should
be done first?
A. Increase the motor speed
B. Open the car doors
C. De-energize, isolate, and lock/tag the energy source as required
D. Remove the governor rope
Rationale: Lockout/tagout helps prevent unexpected energization
while work is being performed. The mechanic must identify and
control hazardous energy before beginning maintenance.
Question 5
Which device is designed to interrupt power to the elevator when an
unsafe condition occurs?
A. Guide shoe
B. Sheave
C. Safety switch
D. Counterweight
Rationale: Safety switches are incorporated into elevator control and
safety circuits to interrupt operation when specified unsafe conditions
are detected.
Question 6
, What is the purpose of guide rails in a traction elevator?
A. Supply power to the motor
B. Support the building structure
C. Guide the car and counterweight vertically
D. Operate the door locks
Rationale: Guide rails provide a controlled path for the elevator car
and counterweight. They also provide the surface against which the
car safety device can act.
Question 7
Which component changes the rotational motion of the hoist machine
into movement of the elevator car?
A. Door restrictor
B. Drive sheave and suspension system
C. Interlock
D. Governor switch
Rationale: In a traction elevator, the motor turns the drive sheave.
Friction between the sheave and suspension ropes produces the
traction needed to move the car and counterweight.
Question 8
What is the primary purpose of an elevator door interlock?
