NEIEP 700 Final Exam: Complete Elevator Systems & Controls Study
Guide (Latest 2026/2027 Update) | Q&A | Grade A | 100% Correct
(Verified Answers) – NEIEP
Subject: NEIEP 700 Final – Elevator Control Systems, Relays, Rectifiers, Transformers,
Selectors, Door Operators, Brakes, Safety Circuits, Metering, Troubleshooting
Source: NEIEP Elevator Industry Training / Electrical Control Systems
Format: Q&A Guide with Technical Rationale | 100% Verified
1: The coil will not pull in despite measuring full line voltage directly across it.
Correct Answer: Open Coil
1. If voltage is present at coil but it does not pull in, the coil itself is open (infinite resistance).
2. Check coil resistance with ohmmeter; should be low but not zero.
2: What happens when the switch is closed, then opened?
Correct Answer: Relay 1 off-delays, Relay 2 drops immediately
1. Off-delay relay (timing relay) maintains state for preset time after input drops.
2. Standard relay drops immediately when control signal removed.
3: What will normally happen if an unintentional ground is introduced in a grounded
control system?
Correct Answer: A fuse will blow
1. Unintentional ground creates short circuit path to ground.
2. Overcurrent protection (fuse or breaker) opens circuit.
4: Condition of relays 2F1-3 when the car is traveling up between the second and third
floors.
Correct Answer: Self Holding
1. Self-holding contact maintains relay energization after initial pickup.
2. Allows continued operation until destination reached.
5: What happens if contact 1F2 7/9 (1F2) fails to close when the car runs down?
Correct Answer: The car will not run down
1. 1F2 contact likely part of down direction enabling circuit.
2. Failure to close prevents completion of down direction control path.
6: Which contact(s) change the direction of the door motor when opening and closing?
Correct Answer: O1, O2, C1, and C2
1. Door operator contacts reverse motor polarity for open vs. close.
2. O contacts for opening; C contacts for closing.
, 7: What should the stopping distance be if a car speed were 100 FPM?
Correct Answer: 24 inches
1. ASME A17.1 stopping distance formula relates to speed squared.
2. Standard: 100 FPM → 24 inches stopping distance.
8: What should the stopping distance be if a car speed were 125 FPM?
Correct Answer: 30 inches
1. Higher speed requires longer stopping distance.
2. 125 FPM → approximately 30 inches governed by code.
9: What is the function of a retiring cam?
Correct Answer: Actuate landing interlocks
1. Retiring cam mechanically operates door locks when car is at floor.
2. Allows doors to open only when car is properly positioned.
10: What happens when a retiring cam lifts?
Correct Answer: Locks Doors
1. Cam lifting engages mechanical locks to prevent door opening outside landing zone.
2. Safety interlock ensures doors remain locked until car at floor.
11: What is the location of the 1F1 4/6 contact?
Correct Answer: (1 B6)
1. Elevator schematic coordinates identify contact location on drawing.
2. Format: (Row Column) notation like (1 B6).
12: What is the location of the 1F1 8-9 contact?
Correct Answer: (2 B2)
1. Contact locations referenced to schematic grid.
2. Cross-referencing aids troubleshooting.
13: How much DC voltage will a single phase, full-wave rectifier with 134 VAC input
produce?
Correct Answer: 120 VDC (134 VAC × 0.9 = 120 VDC)
1. Single-phase full-wave rectifier output ≈ 0.9 × RMS AC input voltage.
2. Assumes no load and ideal diodes.
14: How much DC voltage will a single phase, full-wave rectifier with 240 VAC input
produce?
Correct Answer: 216 VDC (240 VAC × 0.9 = 216 VDC)
1. Output VDC = 0.9 × VAC RMS for single-phase full-wave.
2. Ripple frequency = 120 Hz.
Guide (Latest 2026/2027 Update) | Q&A | Grade A | 100% Correct
(Verified Answers) – NEIEP
Subject: NEIEP 700 Final – Elevator Control Systems, Relays, Rectifiers, Transformers,
Selectors, Door Operators, Brakes, Safety Circuits, Metering, Troubleshooting
Source: NEIEP Elevator Industry Training / Electrical Control Systems
Format: Q&A Guide with Technical Rationale | 100% Verified
1: The coil will not pull in despite measuring full line voltage directly across it.
Correct Answer: Open Coil
1. If voltage is present at coil but it does not pull in, the coil itself is open (infinite resistance).
2. Check coil resistance with ohmmeter; should be low but not zero.
2: What happens when the switch is closed, then opened?
Correct Answer: Relay 1 off-delays, Relay 2 drops immediately
1. Off-delay relay (timing relay) maintains state for preset time after input drops.
2. Standard relay drops immediately when control signal removed.
3: What will normally happen if an unintentional ground is introduced in a grounded
control system?
Correct Answer: A fuse will blow
1. Unintentional ground creates short circuit path to ground.
2. Overcurrent protection (fuse or breaker) opens circuit.
4: Condition of relays 2F1-3 when the car is traveling up between the second and third
floors.
Correct Answer: Self Holding
1. Self-holding contact maintains relay energization after initial pickup.
2. Allows continued operation until destination reached.
5: What happens if contact 1F2 7/9 (1F2) fails to close when the car runs down?
Correct Answer: The car will not run down
1. 1F2 contact likely part of down direction enabling circuit.
2. Failure to close prevents completion of down direction control path.
6: Which contact(s) change the direction of the door motor when opening and closing?
Correct Answer: O1, O2, C1, and C2
1. Door operator contacts reverse motor polarity for open vs. close.
2. O contacts for opening; C contacts for closing.
, 7: What should the stopping distance be if a car speed were 100 FPM?
Correct Answer: 24 inches
1. ASME A17.1 stopping distance formula relates to speed squared.
2. Standard: 100 FPM → 24 inches stopping distance.
8: What should the stopping distance be if a car speed were 125 FPM?
Correct Answer: 30 inches
1. Higher speed requires longer stopping distance.
2. 125 FPM → approximately 30 inches governed by code.
9: What is the function of a retiring cam?
Correct Answer: Actuate landing interlocks
1. Retiring cam mechanically operates door locks when car is at floor.
2. Allows doors to open only when car is properly positioned.
10: What happens when a retiring cam lifts?
Correct Answer: Locks Doors
1. Cam lifting engages mechanical locks to prevent door opening outside landing zone.
2. Safety interlock ensures doors remain locked until car at floor.
11: What is the location of the 1F1 4/6 contact?
Correct Answer: (1 B6)
1. Elevator schematic coordinates identify contact location on drawing.
2. Format: (Row Column) notation like (1 B6).
12: What is the location of the 1F1 8-9 contact?
Correct Answer: (2 B2)
1. Contact locations referenced to schematic grid.
2. Cross-referencing aids troubleshooting.
13: How much DC voltage will a single phase, full-wave rectifier with 134 VAC input
produce?
Correct Answer: 120 VDC (134 VAC × 0.9 = 120 VDC)
1. Single-phase full-wave rectifier output ≈ 0.9 × RMS AC input voltage.
2. Assumes no load and ideal diodes.
14: How much DC voltage will a single phase, full-wave rectifier with 240 VAC input
produce?
Correct Answer: 216 VDC (240 VAC × 0.9 = 216 VDC)
1. Output VDC = 0.9 × VAC RMS for single-phase full-wave.
2. Ripple frequency = 120 Hz.
