DIR – Elevator Mechanic Certification
Exam Practice Questions And Correct
Answers (Verified Answers) Plus
Rationale 2027 Q&A| Instant Download
Pdf.
1. In elevator maintenance, what is the primary purpose of a governor
overspeed switch?
A. To increase the normal operating speed of the elevator
B. To detect excessive car speed and initiate the protective sequence
associated with the safety system
C. To control cab lighting voltage
D. To regulate the temperature of the machine room
Answer: B
The governor overspeed switch is a critical safety component that detects
excessive elevator speed and initiates the appropriate protective action. It
works as part of the elevator's overspeed and safety system rather than as
a normal speed-control device.
2. Which component mechanically engages the car safeties when the
elevator car reaches an unsafe downward speed?
,A. Door restrictor
B. Governor rope and governor mechanism
C. Counterweight guide shoe
D. Car operating panel
Answer: B
The governor monitors car speed and, when its tripping condition is
reached, can actuate the safety mechanism through the governor rope and
associated linkage. This provides an independent protective function
against uncontrolled car descent.
3. What is the principal function of an elevator safety?
A. To increase motor efficiency
B. To stop or restrain the elevator car under specified overspeed or
unintended-motion conditions
C. To regulate door-open time
D. To provide emergency telephone service
Answer: B
Elevator safeties are mechanical protective devices designed to stop or
restrain the car under specified hazardous conditions. Their function is
independent of ordinary service braking and control functions.
4. Which statement best describes the relationship between the elevator
governor and the car safety?
A. The governor normally carries the entire weight of the elevator car
B. The governor detects excessive speed and mechanically initiates
operation of the car safety
C. The car safety controls the governor's electrical power supply
D. The governor is used only to open landing doors
Answer: B
,The governor is a speed-sensing and tripping device, while the car safety is
the mechanism that engages the guide rails or otherwise restrains the car.
Their coordinated operation provides an important layer of elevator
protection.
5. An elevator mechanic is inspecting governor ropes. Which condition
should be treated as a significant safety concern?
A. Correct rope tension and proper alignment
B. Severe wear, corrosion, broken wires, improper tension, or other
deterioration affecting reliable operation
C. Clean rope grooves
D. Proper governor alignment
Answer: B
Governor ropes are safety-critical components. Excessive wear, corrosion,
broken wires, improper tension, or misalignment can interfere with proper
governor operation and therefore require immediate evaluation and
corrective action.
6. What is the primary purpose of an elevator counterweight?
A. To eliminate the need for a traction machine
B. To balance a substantial portion of the car and load weight, reducing the
power required from the driving machine
C. To operate the landing doors mechanically
D. To replace the governor
Answer: B
The counterweight balances the elevator car and a portion of its rated
load. This reduces the torque and power required from the traction
machine and improves the efficiency of the elevator system.
7. A traction elevator has a car mass of 1,500 kg and a counterweight
that balances the car plus a specified portion of rated capacity. Why is
, the counterweight not normally equal to the full car plus full rated-
load mass?
A. Because the elevator is designed so the counterweight balances the car
and a portion of rated load, allowing useful traction and reasonable motor
requirements
B. Because counterweights are used only for decoration
C. Because a full counterweight would eliminate all braking requirements
D. Because counterweights must always be lighter than the governor rope
Answer: A
Traction elevators are generally counterweighted to balance the car plus a
specified percentage of rated capacity. This arrangement reduces motor
power requirements while preserving the differential forces needed for
controlled movement.
8. What is the principal function of traction sheave grooves?
A. To provide controlled traction between the hoisting ropes and sheave
B. To store hydraulic oil
C. To provide electrical insulation
D. To operate the emergency lighting system
Answer: A
Traction sheave grooves are designed to maintain sufficient frictional
engagement with the hoisting ropes. Proper groove condition, rope
condition, and traction are essential for reliable movement of the car and
counterweight.
9. What may occur if traction sheave grooves become excessively worn?
A. Improved rope traction under every operating condition
B. Rope slippage, altered rope wear, reduced traction, and unreliable
elevator performance
Exam Practice Questions And Correct
Answers (Verified Answers) Plus
Rationale 2027 Q&A| Instant Download
Pdf.
1. In elevator maintenance, what is the primary purpose of a governor
overspeed switch?
A. To increase the normal operating speed of the elevator
B. To detect excessive car speed and initiate the protective sequence
associated with the safety system
C. To control cab lighting voltage
D. To regulate the temperature of the machine room
Answer: B
The governor overspeed switch is a critical safety component that detects
excessive elevator speed and initiates the appropriate protective action. It
works as part of the elevator's overspeed and safety system rather than as
a normal speed-control device.
2. Which component mechanically engages the car safeties when the
elevator car reaches an unsafe downward speed?
,A. Door restrictor
B. Governor rope and governor mechanism
C. Counterweight guide shoe
D. Car operating panel
Answer: B
The governor monitors car speed and, when its tripping condition is
reached, can actuate the safety mechanism through the governor rope and
associated linkage. This provides an independent protective function
against uncontrolled car descent.
3. What is the principal function of an elevator safety?
A. To increase motor efficiency
B. To stop or restrain the elevator car under specified overspeed or
unintended-motion conditions
C. To regulate door-open time
D. To provide emergency telephone service
Answer: B
Elevator safeties are mechanical protective devices designed to stop or
restrain the car under specified hazardous conditions. Their function is
independent of ordinary service braking and control functions.
4. Which statement best describes the relationship between the elevator
governor and the car safety?
A. The governor normally carries the entire weight of the elevator car
B. The governor detects excessive speed and mechanically initiates
operation of the car safety
C. The car safety controls the governor's electrical power supply
D. The governor is used only to open landing doors
Answer: B
,The governor is a speed-sensing and tripping device, while the car safety is
the mechanism that engages the guide rails or otherwise restrains the car.
Their coordinated operation provides an important layer of elevator
protection.
5. An elevator mechanic is inspecting governor ropes. Which condition
should be treated as a significant safety concern?
A. Correct rope tension and proper alignment
B. Severe wear, corrosion, broken wires, improper tension, or other
deterioration affecting reliable operation
C. Clean rope grooves
D. Proper governor alignment
Answer: B
Governor ropes are safety-critical components. Excessive wear, corrosion,
broken wires, improper tension, or misalignment can interfere with proper
governor operation and therefore require immediate evaluation and
corrective action.
6. What is the primary purpose of an elevator counterweight?
A. To eliminate the need for a traction machine
B. To balance a substantial portion of the car and load weight, reducing the
power required from the driving machine
C. To operate the landing doors mechanically
D. To replace the governor
Answer: B
The counterweight balances the elevator car and a portion of its rated
load. This reduces the torque and power required from the traction
machine and improves the efficiency of the elevator system.
7. A traction elevator has a car mass of 1,500 kg and a counterweight
that balances the car plus a specified portion of rated capacity. Why is
, the counterweight not normally equal to the full car plus full rated-
load mass?
A. Because the elevator is designed so the counterweight balances the car
and a portion of rated load, allowing useful traction and reasonable motor
requirements
B. Because counterweights are used only for decoration
C. Because a full counterweight would eliminate all braking requirements
D. Because counterweights must always be lighter than the governor rope
Answer: A
Traction elevators are generally counterweighted to balance the car plus a
specified percentage of rated capacity. This arrangement reduces motor
power requirements while preserving the differential forces needed for
controlled movement.
8. What is the principal function of traction sheave grooves?
A. To provide controlled traction between the hoisting ropes and sheave
B. To store hydraulic oil
C. To provide electrical insulation
D. To operate the emergency lighting system
Answer: A
Traction sheave grooves are designed to maintain sufficient frictional
engagement with the hoisting ropes. Proper groove condition, rope
condition, and traction are essential for reliable movement of the car and
counterweight.
9. What may occur if traction sheave grooves become excessively worn?
A. Improved rope traction under every operating condition
B. Rope slippage, altered rope wear, reduced traction, and unreliable
elevator performance
