NEIEP 200 Final Exam (courses 205-250):
Questions & Answers: Latest Updated A+
Score Sloution
Core Concepts: Electrical Theory, Motor Controls, Codes, & Safety
Section 1: Electrical Fundamentals & Theory (Questions 1-20)
1. Q: In a three-phase, wye-connected system, what is the relationship between line
voltage (V_L) and phase voltage (V_Ph)?
A: V_L = V_Ph × √3
B: V_L = V_Ph
C: V_Ph = V_L × √3
D: V_L = V_Ph / √3
2. Q: The unit of measurement for impedance (Z) is the:
A: Watt
B: Ohm
C: Siemen
D: Volt
3. Q: In an inductive AC circuit, the current ______ the voltage.
A: Leads
B: Is in phase with
C: Lags
D: Is unrelated to
4. Q: Power factor is defined as the ratio of:
A: Apparent power to true power
B: True power to apparent power
C: Reactive power to true power
D: True power to reactive power
5. Q: The total resistance of three 12-ohm resistors in parallel is:
A: 36 ohms
B: 4 ohms
, C: 0.333 ohms
D: 24 ohms
6. Q: A capacitor opposes a change in:
A: Current
B: Resistance
C: Voltage
D: Frequency
7. Q: The primary purpose of a transformer is to:
A: Convert AC to DC
B: Change the frequency of AC
C: Change the voltage level of AC
D: Correct power factor
8. Q: In a DC series-wound motor, torque is directly proportional to:
A: The square of the armature current
B: The field flux only
C: The inverse of speed
D: Armature voltage
9. Q: Kirchhoff's Voltage Law states that the algebraic sum of all voltages around any closed
loop is:
A: Equal to the total current
B: Zero
C: Equal to the source voltage
D: Divided among the resistors
10. Q: The "skin effect" in AC circuits causes current to flow:
A: Evenly through the entire conductor cross-section
B: Mostly near the surface of the conductor
C: Only in the insulation
D: Faster in the conductor's center
11. Q: A synchronous motor is often used in applications because it can:
A: Provide variable speed without controls
B: Operate at leading power factor and correct PF
C: Have a very high starting torque
D: Be the most inexpensive motor type
,12. Q: The rotating magnetic field in a three-phase induction motor is created by:
A: The DC field excitation
B: The phase difference of currents in spatially displaced windings
C: The commutator and brushes
D: Permanent magnets in the stator
13. Q: The speed of a three-phase induction motor is primarily determined by:
A: The load torque only
B: The frequency of the supply and the number of stator poles
C: The rotor bar resistance
D: The line voltage
14. Q: A shaded-pole motor is a type of:
A: DC Series Motor
B: Three-Phase Synchronous Motor
C: Single-Phase Induction Motor
D: Stepper Motor
15. Q: The main purpose of the commutator in a DC motor is to:
A: Reduce sparking
B: Convert incoming AC to DC
C: Reverse current direction in the armature coils to maintain rotation
D: Provide a mechanical brake
16. Q: The unit for magnetic flux density is:
A: Weber
B: Tesla
C: Henry
D: Farad
17. Q: In a balanced three-phase system, the current in the neutral conductor is:
A: The sum of the phase currents
B: Zero
C: √3 times the phase current
D: Always dangerous
18. Q: A thermocouple generates a voltage based on the:
A: Piezoelectric effect
B: Seebeck effect
, C: Hall effect
D: Photovoltaic effect
19. Q: The time constant (τ) for an RC circuit is calculated as:
A: R + C
B: R / C
C: R × C
D: C / R
20. Q: Hysteresis losses in a transformer core are minimized by using:
A: Laminated steel
B: Solid iron
C: High-reluctance material
D: Special silicon steel alloys
Section 2: Motor Control Circuits & Components (Questions 21-45)
21. Q: The primary function of an overload relay in a motor starter is to protect against:
A: Short circuits
B: Overvoltage
C: Sustained overcurrent (overload)
D: Phase reversal
22. Q: In a standard three-wire control circuit with a START/STOP station, what provides the
"memory" or holding contact?
A: The overload contacts
B: The STOP button
C: The auxiliary contact (seal-in) on the starter
D: The main power contacts
23. Q: A Jog (or Inching) circuit is designed to:
A: Provide maximum starting torque
B: Allow momentary operation for positioning
C: Reverse the motor direction
D: Act as an emergency stop
24. Q: A Time-Delay, Normally Open (TDNO) relay contact will:
A: Close immediately when energized, open after a delay when de-energized.
B: Open immediately when energized, close after a delay when de-energized.
Questions & Answers: Latest Updated A+
Score Sloution
Core Concepts: Electrical Theory, Motor Controls, Codes, & Safety
Section 1: Electrical Fundamentals & Theory (Questions 1-20)
1. Q: In a three-phase, wye-connected system, what is the relationship between line
voltage (V_L) and phase voltage (V_Ph)?
A: V_L = V_Ph × √3
B: V_L = V_Ph
C: V_Ph = V_L × √3
D: V_L = V_Ph / √3
2. Q: The unit of measurement for impedance (Z) is the:
A: Watt
B: Ohm
C: Siemen
D: Volt
3. Q: In an inductive AC circuit, the current ______ the voltage.
A: Leads
B: Is in phase with
C: Lags
D: Is unrelated to
4. Q: Power factor is defined as the ratio of:
A: Apparent power to true power
B: True power to apparent power
C: Reactive power to true power
D: True power to reactive power
5. Q: The total resistance of three 12-ohm resistors in parallel is:
A: 36 ohms
B: 4 ohms
, C: 0.333 ohms
D: 24 ohms
6. Q: A capacitor opposes a change in:
A: Current
B: Resistance
C: Voltage
D: Frequency
7. Q: The primary purpose of a transformer is to:
A: Convert AC to DC
B: Change the frequency of AC
C: Change the voltage level of AC
D: Correct power factor
8. Q: In a DC series-wound motor, torque is directly proportional to:
A: The square of the armature current
B: The field flux only
C: The inverse of speed
D: Armature voltage
9. Q: Kirchhoff's Voltage Law states that the algebraic sum of all voltages around any closed
loop is:
A: Equal to the total current
B: Zero
C: Equal to the source voltage
D: Divided among the resistors
10. Q: The "skin effect" in AC circuits causes current to flow:
A: Evenly through the entire conductor cross-section
B: Mostly near the surface of the conductor
C: Only in the insulation
D: Faster in the conductor's center
11. Q: A synchronous motor is often used in applications because it can:
A: Provide variable speed without controls
B: Operate at leading power factor and correct PF
C: Have a very high starting torque
D: Be the most inexpensive motor type
,12. Q: The rotating magnetic field in a three-phase induction motor is created by:
A: The DC field excitation
B: The phase difference of currents in spatially displaced windings
C: The commutator and brushes
D: Permanent magnets in the stator
13. Q: The speed of a three-phase induction motor is primarily determined by:
A: The load torque only
B: The frequency of the supply and the number of stator poles
C: The rotor bar resistance
D: The line voltage
14. Q: A shaded-pole motor is a type of:
A: DC Series Motor
B: Three-Phase Synchronous Motor
C: Single-Phase Induction Motor
D: Stepper Motor
15. Q: The main purpose of the commutator in a DC motor is to:
A: Reduce sparking
B: Convert incoming AC to DC
C: Reverse current direction in the armature coils to maintain rotation
D: Provide a mechanical brake
16. Q: The unit for magnetic flux density is:
A: Weber
B: Tesla
C: Henry
D: Farad
17. Q: In a balanced three-phase system, the current in the neutral conductor is:
A: The sum of the phase currents
B: Zero
C: √3 times the phase current
D: Always dangerous
18. Q: A thermocouple generates a voltage based on the:
A: Piezoelectric effect
B: Seebeck effect
, C: Hall effect
D: Photovoltaic effect
19. Q: The time constant (τ) for an RC circuit is calculated as:
A: R + C
B: R / C
C: R × C
D: C / R
20. Q: Hysteresis losses in a transformer core are minimized by using:
A: Laminated steel
B: Solid iron
C: High-reluctance material
D: Special silicon steel alloys
Section 2: Motor Control Circuits & Components (Questions 21-45)
21. Q: The primary function of an overload relay in a motor starter is to protect against:
A: Short circuits
B: Overvoltage
C: Sustained overcurrent (overload)
D: Phase reversal
22. Q: In a standard three-wire control circuit with a START/STOP station, what provides the
"memory" or holding contact?
A: The overload contacts
B: The STOP button
C: The auxiliary contact (seal-in) on the starter
D: The main power contacts
23. Q: A Jog (or Inching) circuit is designed to:
A: Provide maximum starting torque
B: Allow momentary operation for positioning
C: Reverse the motor direction
D: Act as an emergency stop
24. Q: A Time-Delay, Normally Open (TDNO) relay contact will:
A: Close immediately when energized, open after a delay when de-energized.
B: Open immediately when energized, close after a delay when de-energized.
