NEIEP 400 NEIEP 400 | 100% Correct
Exam Prep 2026/2027 Practice Exam
2026/2027 — Elevator Electrical,
Mechanical, Safety & Control Systems |
Exam-Style MCQs with Correct Answers &
Detailed Rationales | Certification Prep
1. In a traction elevator, what is the primary purpose of the
governor overspeed switch?
A. To regulate normal leveling speed
B. To detect excessive car speed and initiate the safety circuit
C. To increase motor torque during acceleration
D. To control door reopening
B. To detect excessive car speed and initiate the safety
circuit
The governor overspeed switch is designed to respond when
the elevator reaches a predetermined excessive speed and
initiate the appropriate safety action. It does not regulate
normal operating speed; door reopening and motor torque are
controlled by other components and circuits.
2. Which component converts electrical energy into
mechanical rotational energy in a typical elevator
hoisting machine?
A. Transformer
B. Rectifier
,C. Motor
D. Contactor
C. Motor
The motor converts electrical energy into mechanical rotation
that drives the hoisting machinery. A transformer changes
voltage, a rectifier converts AC to DC, and a contactor
switches power to a circuit rather than producing mechanical
output.
3. A fuse repeatedly opens immediately after a motor circuit
is energized. What should be investigated first?
A. Increase the fuse size
B. Replace the fuse with a circuit breaker of higher rating
C. Determine whether a short circuit or abnormal current
condition exists
D. Bypass the fuse temporarily
C. Determine whether a short circuit or abnormal current
condition exists
Repeated fuse operation is an indication that excessive
current is present and the cause must be identified before
replacing the protective device. Installing a larger protective
device or bypassing protection can create a serious electrical
and fire hazard.
4. What is the primary function of a transformer in an
elevator control system?
A. Convert mechanical energy into electrical energy
B. Change electrical voltage to a different required level
,C. Increase motor speed mechanically
D. Store electrical energy for emergency operation
B. Change electrical voltage to a different required level
A transformer changes AC voltage through electromagnetic
induction, allowing control circuits and other equipment to
operate at their required voltage. It does not mechanically
alter motor speed or serve as the primary storage device for
electrical energy.
5. In a conventional relay logic control circuit, what is the
primary purpose of an interlock?
A. Increase motor horsepower
B. Prevent two incompatible operations from occurring
simultaneously
C. Reduce hydraulic pressure
D. Increase door speed
B. Prevent two incompatible operations from occurring
simultaneously
Electrical and mechanical interlocks prevent unsafe or
conflicting operations, such as energizing opposing
directional circuits at the same time. They are protective
control features rather than devices for increasing motor or
door performance.
6. An elevator fails to run in either direction, but the control
system has normal incoming power. Which condition
should receive priority during troubleshooting?
, A. Cosmetic condition of the car
B. Open safety circuit
C. Car lighting brightness
D. Door sill appearance
B. Open safety circuit
An open safety circuit can intentionally prevent elevator
movement even when control power is present.
Troubleshooting should begin with the safety and enabling
circuits before assuming a mechanical problem or replacing
major components.
7. What is the main purpose of an elevator machine brake?
A. To generate electrical power
B. To control car lighting
C. To hold the hoisting machine and car stationary when
required
D. To measure motor current
C. To hold the hoisting machine and car stationary when
required
The machine brake provides the stopping and holding function
required to prevent unintended movement when the drive is
not actively controlling the machine. It does not generate
power or measure current.
8. Why is a normally closed contact commonly used in a
safety circuit?
A. It allows a broken conductor to go undetected
B. It causes the circuit to become energized when a safety
Exam Prep 2026/2027 Practice Exam
2026/2027 — Elevator Electrical,
Mechanical, Safety & Control Systems |
Exam-Style MCQs with Correct Answers &
Detailed Rationales | Certification Prep
1. In a traction elevator, what is the primary purpose of the
governor overspeed switch?
A. To regulate normal leveling speed
B. To detect excessive car speed and initiate the safety circuit
C. To increase motor torque during acceleration
D. To control door reopening
B. To detect excessive car speed and initiate the safety
circuit
The governor overspeed switch is designed to respond when
the elevator reaches a predetermined excessive speed and
initiate the appropriate safety action. It does not regulate
normal operating speed; door reopening and motor torque are
controlled by other components and circuits.
2. Which component converts electrical energy into
mechanical rotational energy in a typical elevator
hoisting machine?
A. Transformer
B. Rectifier
,C. Motor
D. Contactor
C. Motor
The motor converts electrical energy into mechanical rotation
that drives the hoisting machinery. A transformer changes
voltage, a rectifier converts AC to DC, and a contactor
switches power to a circuit rather than producing mechanical
output.
3. A fuse repeatedly opens immediately after a motor circuit
is energized. What should be investigated first?
A. Increase the fuse size
B. Replace the fuse with a circuit breaker of higher rating
C. Determine whether a short circuit or abnormal current
condition exists
D. Bypass the fuse temporarily
C. Determine whether a short circuit or abnormal current
condition exists
Repeated fuse operation is an indication that excessive
current is present and the cause must be identified before
replacing the protective device. Installing a larger protective
device or bypassing protection can create a serious electrical
and fire hazard.
4. What is the primary function of a transformer in an
elevator control system?
A. Convert mechanical energy into electrical energy
B. Change electrical voltage to a different required level
,C. Increase motor speed mechanically
D. Store electrical energy for emergency operation
B. Change electrical voltage to a different required level
A transformer changes AC voltage through electromagnetic
induction, allowing control circuits and other equipment to
operate at their required voltage. It does not mechanically
alter motor speed or serve as the primary storage device for
electrical energy.
5. In a conventional relay logic control circuit, what is the
primary purpose of an interlock?
A. Increase motor horsepower
B. Prevent two incompatible operations from occurring
simultaneously
C. Reduce hydraulic pressure
D. Increase door speed
B. Prevent two incompatible operations from occurring
simultaneously
Electrical and mechanical interlocks prevent unsafe or
conflicting operations, such as energizing opposing
directional circuits at the same time. They are protective
control features rather than devices for increasing motor or
door performance.
6. An elevator fails to run in either direction, but the control
system has normal incoming power. Which condition
should receive priority during troubleshooting?
, A. Cosmetic condition of the car
B. Open safety circuit
C. Car lighting brightness
D. Door sill appearance
B. Open safety circuit
An open safety circuit can intentionally prevent elevator
movement even when control power is present.
Troubleshooting should begin with the safety and enabling
circuits before assuming a mechanical problem or replacing
major components.
7. What is the main purpose of an elevator machine brake?
A. To generate electrical power
B. To control car lighting
C. To hold the hoisting machine and car stationary when
required
D. To measure motor current
C. To hold the hoisting machine and car stationary when
required
The machine brake provides the stopping and holding function
required to prevent unintended movement when the drive is
not actively controlling the machine. It does not generate
power or measure current.
8. Why is a normally closed contact commonly used in a
safety circuit?
A. It allows a broken conductor to go undetected
B. It causes the circuit to become energized when a safety
