1
NEIEP 800 Final Exam Version 2 Actual
Exam 2026/2027 | Elevator Industry
Certification | Questions with Verified
Answers | 100% Correct | Pass
Guaranteed
Q001: A geared traction elevator controller receives a 480 VAC three-phase supply.
During a ride-through power dip the line voltage drops to 432 VAC. Per NEC
430.32(B) what percent of full-load current must the overload device still carry
before tripping?
Options:
A. 95 %
B. 100 %
C. 115 % - CORRECT
D. 125 %
ANSWER: C
Q002: A DC elevator machine field winding is supplied through a full-wave silicon
bridge rectifier mounted on the controller heat-sink. One diode opens; the scope
now shows a 120 Hz ripple superimposed on DC. What is the most noticeable ride
effect?
Options:
A. 5 % over-speed at mid-point
B. Jerk on acceleration only
C. 60 Hz vibration felt in car - CORRECT
, 2
D. Regeneration failure at floor level
ANSWER: C
Q003: An encoderless vector VFD uses slip-compensation algorithm. Motor name-
plate full-load slip is 3.2 %. If actual slip measured under full-load up-run is 4.1 %,
which parameter should the technician first adjust?
Options:
A. Decrease acceleration ramp
B. Increase slip-compensation gain - CORRECT
C. Lower carrier frequency
D. Boost DC injection braking
ANSWER: B
Q004: A hydro elevator with 2:1 roping uses a 480 VAC submersible pump motor.
The motor name-plate lists 22 A FLA at 460 V. What is the minimum ampacity
required for the branch-circuit conductors per NEC 430.22?
Options:
A. 22 A
B. 25.3 A
C. 27.5 A - CORRECT
D. 30.8 A
ANSWER: C
Q005: During annual safety test a technician measures 0.8 Ω between the
controller chassis and the building ground electrode. According to NEC
250.4(A)(5) what is the maximum allowed resistance for this intentionally
grounded part?
Options:
A. 0.5 Ω
, 3
B. 1 Ω
C. 1.5 Ω
D. 25 Ω - CORRECT
ANSWER: D
Q006: A regenerative AC VFD displays “DC Bus Over-Volt” on down-run with
full load. Bus voltage reaches 820 VDC on a 480 VAC system. Which change will
most effectively prevent this fault?
Options:
A. Shorten decel ramp
B. Add dynamic-braking resistor - CORRECT
C. Lower motor field current
D. Increase carrier frequency
ANSWER: B
Q007: An encoder channel outputs 5 VDC square wave. Scope probe shows 4.2 V
peak with 0.6 V peak-to-peak noise. What is the first recommended step to verify
signal integrity?
Options:
A. Replace encoder
B. Use differential probe and check shield ground - CORRECT
C. Increase scope voltage scale
D. Install RC filter at drive input
ANSWER: B
Q008: A machine-room-less elevator uses a permanent-magnet synchronous motor.
Back-EMF measured with a scope is trapezoidal. Which drive type is most
appropriate?
Options:
NEIEP 800 Final Exam Version 2 Actual
Exam 2026/2027 | Elevator Industry
Certification | Questions with Verified
Answers | 100% Correct | Pass
Guaranteed
Q001: A geared traction elevator controller receives a 480 VAC three-phase supply.
During a ride-through power dip the line voltage drops to 432 VAC. Per NEC
430.32(B) what percent of full-load current must the overload device still carry
before tripping?
Options:
A. 95 %
B. 100 %
C. 115 % - CORRECT
D. 125 %
ANSWER: C
Q002: A DC elevator machine field winding is supplied through a full-wave silicon
bridge rectifier mounted on the controller heat-sink. One diode opens; the scope
now shows a 120 Hz ripple superimposed on DC. What is the most noticeable ride
effect?
Options:
A. 5 % over-speed at mid-point
B. Jerk on acceleration only
C. 60 Hz vibration felt in car - CORRECT
, 2
D. Regeneration failure at floor level
ANSWER: C
Q003: An encoderless vector VFD uses slip-compensation algorithm. Motor name-
plate full-load slip is 3.2 %. If actual slip measured under full-load up-run is 4.1 %,
which parameter should the technician first adjust?
Options:
A. Decrease acceleration ramp
B. Increase slip-compensation gain - CORRECT
C. Lower carrier frequency
D. Boost DC injection braking
ANSWER: B
Q004: A hydro elevator with 2:1 roping uses a 480 VAC submersible pump motor.
The motor name-plate lists 22 A FLA at 460 V. What is the minimum ampacity
required for the branch-circuit conductors per NEC 430.22?
Options:
A. 22 A
B. 25.3 A
C. 27.5 A - CORRECT
D. 30.8 A
ANSWER: C
Q005: During annual safety test a technician measures 0.8 Ω between the
controller chassis and the building ground electrode. According to NEC
250.4(A)(5) what is the maximum allowed resistance for this intentionally
grounded part?
Options:
A. 0.5 Ω
, 3
B. 1 Ω
C. 1.5 Ω
D. 25 Ω - CORRECT
ANSWER: D
Q006: A regenerative AC VFD displays “DC Bus Over-Volt” on down-run with
full load. Bus voltage reaches 820 VDC on a 480 VAC system. Which change will
most effectively prevent this fault?
Options:
A. Shorten decel ramp
B. Add dynamic-braking resistor - CORRECT
C. Lower motor field current
D. Increase carrier frequency
ANSWER: B
Q007: An encoder channel outputs 5 VDC square wave. Scope probe shows 4.2 V
peak with 0.6 V peak-to-peak noise. What is the first recommended step to verify
signal integrity?
Options:
A. Replace encoder
B. Use differential probe and check shield ground - CORRECT
C. Increase scope voltage scale
D. Install RC filter at drive input
ANSWER: B
Q008: A machine-room-less elevator uses a permanent-magnet synchronous motor.
Back-EMF measured with a scope is trapezoidal. Which drive type is most
appropriate?
Options:
