1
NEIEP 800 Final Exam Version
2 Actual Exam Questions and Answers
with Rationales 2026/2027 | Elevator
Industry Exam | Pass Guarantee
Q001: A traction elevator controller is experiencing intermittent fault codes related
to encoder drift during high-speed runs. The encoder is a 1024-pulse/revolution
quadrature type directly coupled to the motor shaft. Using a digital storage
oscilloscope, you measure the A and B channel signals and notice that the duty
cycle varies between 45% and 55% as motor temperature increases. Which
component is most likely causing this issue?
Options:
A. Worn encoder coupling causing mechanical slippage
B. Encoder power supply voltage dropping below 4.5 VDC under thermal load
C. Degraded encoder bearings causing wobble and inconsistent pulse generation -
CORRECT
D. Shield grounding issue introducing noise into the controller's high -speed
counter
ANSWER: C
Q002: During a five-year full load test on a geared traction elevator, you measure
the current draw on each phase of the AC motor and find: Phase A = 38A, Phase B
= 39A, Phase C = 52A. The motor nameplate indicates 40A full-load current.
According to NEC Article 620.61(A), what is the maximum allowable current
imbalance before requiring motor winding inspection or replacement?
Options:
, 2
A. 5% average deviation
B. 8% average deviation
C. 10% maximum deviation from average - CORRECT
D. 15% maximum deviation from nameplate
ANSWER: C
Q003: An emergency brake coil on a hydraulic elevator draws 2.8A at 125 VDC
during normal operation. During a monthly inspection, you measure the coil
resistance as 52Ω at ambient temperature (20°C). The coil temperature rises to
75°C during continuous operation. Using the temperature coefficient of resistance
for copper (0.00393 per °C), what is the expected hot resistance and does it fall
within acceptable limits?
Options:
A. 62Ω, within limits (±15%)
B. 65Ω, within limits (±10%)
C. 63.5Ω, outside acceptable tolerance (±5%)
D. 64.2Ω, within acceptable tolerance (±8%) - CORRECT
ANSWER: D
Q004: You are troubleshooting a regenerative AC drive (AFE - Active Front End)
that displays "DC Bus Overvoltage" fault during light load conditions. The DC bus
voltage reads 820VDC (rated 750VDC). Which parameter in the drive's braking
chopper circuit should you investigate first according to manufacturer
specifications?
Options:
A. Braking resistor cold resistance value
B. IGBT switching frequency
C. DC bus voltage detection threshold and hysteresis settings - CORRECT
D. Input line reactor impedance
, 3
ANSWER: C
Q005: A machine room less (MRL) elevator uses a permanent magnet synchronous
motor with an integrated encoder. The controller displays "Motor Pole Position
Error" on startup. According to ASME A17.1-2022, what is the required procedure
to re-establish the pole position reference?
Options:
A. Manually rotate the motor shaft 360° and recalibrate
B. Perform an auto-tuning sequence with the brake released and car at mid-travel
C. Run the motor at reduced speed (≤3% rated) for encoder alignment, then store
offset - CORRECT
D. Replace the motor and encoder assembly
ANSWER: C
Q006: During an annual inspection, you test the elevator's emergency power
system (EPSS). When transferring to generator power, the controller loses
communication with the motor drive for 2.3 seconds, causing a safety chain fault.
The EPSS transfer time is rated at 2 seconds. According to NEC Article 620.91,
what is the maximum allowable power interruption time for microprocessor-based
elevator controllers?
Options:
A. 0.5 seconds
B. 1.0 seconds
C. 1.5 seconds - CORRECT
D. 2.0 seconds
ANSWER: C
Q007: You are analyzing a variable frequency drive's (VFD) output waveform
using a differential voltage probe and notice significant common mode voltage
spikes exceeding 500V peak-to-peak. This is causing nuisance tripping of the
NEIEP 800 Final Exam Version
2 Actual Exam Questions and Answers
with Rationales 2026/2027 | Elevator
Industry Exam | Pass Guarantee
Q001: A traction elevator controller is experiencing intermittent fault codes related
to encoder drift during high-speed runs. The encoder is a 1024-pulse/revolution
quadrature type directly coupled to the motor shaft. Using a digital storage
oscilloscope, you measure the A and B channel signals and notice that the duty
cycle varies between 45% and 55% as motor temperature increases. Which
component is most likely causing this issue?
Options:
A. Worn encoder coupling causing mechanical slippage
B. Encoder power supply voltage dropping below 4.5 VDC under thermal load
C. Degraded encoder bearings causing wobble and inconsistent pulse generation -
CORRECT
D. Shield grounding issue introducing noise into the controller's high -speed
counter
ANSWER: C
Q002: During a five-year full load test on a geared traction elevator, you measure
the current draw on each phase of the AC motor and find: Phase A = 38A, Phase B
= 39A, Phase C = 52A. The motor nameplate indicates 40A full-load current.
According to NEC Article 620.61(A), what is the maximum allowable current
imbalance before requiring motor winding inspection or replacement?
Options:
, 2
A. 5% average deviation
B. 8% average deviation
C. 10% maximum deviation from average - CORRECT
D. 15% maximum deviation from nameplate
ANSWER: C
Q003: An emergency brake coil on a hydraulic elevator draws 2.8A at 125 VDC
during normal operation. During a monthly inspection, you measure the coil
resistance as 52Ω at ambient temperature (20°C). The coil temperature rises to
75°C during continuous operation. Using the temperature coefficient of resistance
for copper (0.00393 per °C), what is the expected hot resistance and does it fall
within acceptable limits?
Options:
A. 62Ω, within limits (±15%)
B. 65Ω, within limits (±10%)
C. 63.5Ω, outside acceptable tolerance (±5%)
D. 64.2Ω, within acceptable tolerance (±8%) - CORRECT
ANSWER: D
Q004: You are troubleshooting a regenerative AC drive (AFE - Active Front End)
that displays "DC Bus Overvoltage" fault during light load conditions. The DC bus
voltage reads 820VDC (rated 750VDC). Which parameter in the drive's braking
chopper circuit should you investigate first according to manufacturer
specifications?
Options:
A. Braking resistor cold resistance value
B. IGBT switching frequency
C. DC bus voltage detection threshold and hysteresis settings - CORRECT
D. Input line reactor impedance
, 3
ANSWER: C
Q005: A machine room less (MRL) elevator uses a permanent magnet synchronous
motor with an integrated encoder. The controller displays "Motor Pole Position
Error" on startup. According to ASME A17.1-2022, what is the required procedure
to re-establish the pole position reference?
Options:
A. Manually rotate the motor shaft 360° and recalibrate
B. Perform an auto-tuning sequence with the brake released and car at mid-travel
C. Run the motor at reduced speed (≤3% rated) for encoder alignment, then store
offset - CORRECT
D. Replace the motor and encoder assembly
ANSWER: C
Q006: During an annual inspection, you test the elevator's emergency power
system (EPSS). When transferring to generator power, the controller loses
communication with the motor drive for 2.3 seconds, causing a safety chain fault.
The EPSS transfer time is rated at 2 seconds. According to NEC Article 620.91,
what is the maximum allowable power interruption time for microprocessor-based
elevator controllers?
Options:
A. 0.5 seconds
B. 1.0 seconds
C. 1.5 seconds - CORRECT
D. 2.0 seconds
ANSWER: C
Q007: You are analyzing a variable frequency drive's (VFD) output waveform
using a differential voltage probe and notice significant common mode voltage
spikes exceeding 500V peak-to-peak. This is causing nuisance tripping of the
