NEIEP Mechanics Exam Elevator Industry Certification Question
Bank (Latest 2026/2027 Edition) – 100% Correct Questions,
Answers & Detailed Rationales
Total Questions: 50
Time Allowed: 90 Minutes
Passing Score: 80%
Instructions: Select the BEST answer for each question based on NEIEP curriculum,
ASME A17.1/CSA B44 Safety Code, and elevator industry best practices. For
troubleshooting questions, use logical fault-finding methodology and proper safety
procedures.
SECTION 1: ELECTRICAL THEORY AND COMPONENTS
Questions 1–9
1. A DC elevator motor is experiencing excessive arcing at the commutator. During
inspection, the mechanic notices the commutator segments are worn unevenly. What is
the primary function of the commutator in a DC motor?
A. To convert alternating current to direct current
B. To reverse the direction of current flow in the armature coils as the motor rotates
C. To provide mechanical support for the field windings
,D. To regulate the voltage supplied by the SCR drive
Correct Answer: B
Rationale: The commutator's primary function is to reverse the direction of current flow
in the armature coils as the motor rotates, ensuring continuous torque in one direction.
This mechanical switching action is fundamental to DC motor operation. Excessive
arcing often indicates worn brushes, uneven segments, or improper seating.
2. A step-down transformer on an elevator controller has 800 primary turns and 200
secondary turns. If the primary voltage is 480 volts, what is the secondary voltage?
A. 120 volts
B. 240 volts
C. 60 volts
D. 1920 volts
Correct Answer: A
Rationale: The turns ratio determines the output voltage: Ns/Np = Vs/Vp. With 200/800
= 0.25, the secondary voltage is 480 × 0.25 = 120 volts. Step-down transformers are
commonly used in elevator control circuits to reduce line voltage to safer levels for logic
and relay circuits.
3. A mechanic is troubleshooting an open circuit in a low-voltage control line. Before
using a digital multimeter to test continuity across a suspected break, what is the most
critical safety step?
A. Set the meter to the highest resistance range
,B. Ensure the circuit is completely de-energized
C. Connect the meter leads in parallel with the component
D. Verify the meter batteries are fresh
Correct Answer: B
Rationale: Continuity testing requires the circuit to be powered off. Testing continuity on
an energized circuit can damage the multimeter, produce false readings, and create an
arc flash hazard. Always verify zero energy state before resistance or continuity testing.
4. During a controller inspection, a mechanic observes that a Metal Oxide Varistor
(MOV) has fractured and shows burn marks. What is the proper course of action?
A. Remove the MOV and operate the controller without it until replacement parts arrive
B. Replace the MOV with a component of equal or higher voltage rating
C. Bypass the MOV with a wire jumper to restore circuit protection
D. Apply insulating tape around the damaged MOV and return to service
Correct Answer: B
Rationale: An MOV protects against voltage transients by clamping spikes. A damaged
MOV has failed to protect the circuit and must be replaced with a component of equal
or higher voltage rating to restore transient protection. Operating without an MOV or
bypassing it leaves sensitive electronics vulnerable to surge damage.
5. A mechanic measures resistance across a normally closed safety switch in an
elevator safety chain. The meter reads 1.2 ohms. Which conclusion is correct?
, A. The switch contacts are welded closed and must be replaced
B. The reading indicates normal contact resistance for a closed switch
C. The switch is open and the circuit is incomplete
D. The meter is malfunctioning because the reading should be zero ohms
Correct Answer: B
Rationale: A normally closed switch in good condition will exhibit contact resistance in
the range of 1–2 ohms (typically around 1.2 ohms) due to contact material and
connection resistance. A zero-ohm reading would indicate a short, while an infinite
reading indicates an open circuit. This measurement confirms the switch is functioning
normally.
6. A mechanic is adjusting a DC generator used in an elevator Ward-Leonard system. As
power is added to the generator field, the connected motor does not gain speed. What
condition is most likely occurring?
A. The generator has reached saturation
B. The motor brushes are reversed
C. The interpoles are connected in series with the shunt field
D. The SCR firing angle is set to maximum
Correct Answer: A
Rationale: Generator saturation occurs when increasing field current no longer produces
a proportional increase in output voltage. Beyond the saturation point, additional power
to the field yields minimal or no speed increase in the driven motor. This is a normal
Bank (Latest 2026/2027 Edition) – 100% Correct Questions,
Answers & Detailed Rationales
Total Questions: 50
Time Allowed: 90 Minutes
Passing Score: 80%
Instructions: Select the BEST answer for each question based on NEIEP curriculum,
ASME A17.1/CSA B44 Safety Code, and elevator industry best practices. For
troubleshooting questions, use logical fault-finding methodology and proper safety
procedures.
SECTION 1: ELECTRICAL THEORY AND COMPONENTS
Questions 1–9
1. A DC elevator motor is experiencing excessive arcing at the commutator. During
inspection, the mechanic notices the commutator segments are worn unevenly. What is
the primary function of the commutator in a DC motor?
A. To convert alternating current to direct current
B. To reverse the direction of current flow in the armature coils as the motor rotates
C. To provide mechanical support for the field windings
,D. To regulate the voltage supplied by the SCR drive
Correct Answer: B
Rationale: The commutator's primary function is to reverse the direction of current flow
in the armature coils as the motor rotates, ensuring continuous torque in one direction.
This mechanical switching action is fundamental to DC motor operation. Excessive
arcing often indicates worn brushes, uneven segments, or improper seating.
2. A step-down transformer on an elevator controller has 800 primary turns and 200
secondary turns. If the primary voltage is 480 volts, what is the secondary voltage?
A. 120 volts
B. 240 volts
C. 60 volts
D. 1920 volts
Correct Answer: A
Rationale: The turns ratio determines the output voltage: Ns/Np = Vs/Vp. With 200/800
= 0.25, the secondary voltage is 480 × 0.25 = 120 volts. Step-down transformers are
commonly used in elevator control circuits to reduce line voltage to safer levels for logic
and relay circuits.
3. A mechanic is troubleshooting an open circuit in a low-voltage control line. Before
using a digital multimeter to test continuity across a suspected break, what is the most
critical safety step?
A. Set the meter to the highest resistance range
,B. Ensure the circuit is completely de-energized
C. Connect the meter leads in parallel with the component
D. Verify the meter batteries are fresh
Correct Answer: B
Rationale: Continuity testing requires the circuit to be powered off. Testing continuity on
an energized circuit can damage the multimeter, produce false readings, and create an
arc flash hazard. Always verify zero energy state before resistance or continuity testing.
4. During a controller inspection, a mechanic observes that a Metal Oxide Varistor
(MOV) has fractured and shows burn marks. What is the proper course of action?
A. Remove the MOV and operate the controller without it until replacement parts arrive
B. Replace the MOV with a component of equal or higher voltage rating
C. Bypass the MOV with a wire jumper to restore circuit protection
D. Apply insulating tape around the damaged MOV and return to service
Correct Answer: B
Rationale: An MOV protects against voltage transients by clamping spikes. A damaged
MOV has failed to protect the circuit and must be replaced with a component of equal
or higher voltage rating to restore transient protection. Operating without an MOV or
bypassing it leaves sensitive electronics vulnerable to surge damage.
5. A mechanic measures resistance across a normally closed safety switch in an
elevator safety chain. The meter reads 1.2 ohms. Which conclusion is correct?
, A. The switch contacts are welded closed and must be replaced
B. The reading indicates normal contact resistance for a closed switch
C. The switch is open and the circuit is incomplete
D. The meter is malfunctioning because the reading should be zero ohms
Correct Answer: B
Rationale: A normally closed switch in good condition will exhibit contact resistance in
the range of 1–2 ohms (typically around 1.2 ohms) due to contact material and
connection resistance. A zero-ohm reading would indicate a short, while an infinite
reading indicates an open circuit. This measurement confirms the switch is functioning
normally.
6. A mechanic is adjusting a DC generator used in an elevator Ward-Leonard system. As
power is added to the generator field, the connected motor does not gain speed. What
condition is most likely occurring?
A. The generator has reached saturation
B. The motor brushes are reversed
C. The interpoles are connected in series with the shunt field
D. The SCR firing angle is set to maximum
Correct Answer: A
Rationale: Generator saturation occurs when increasing field current no longer produces
a proportional increase in output voltage. Beyond the saturation point, additional power
to the field yields minimal or no speed increase in the driven motor. This is a normal
