NEIEP 400 FINAL EXAM NEWEST ACTUAL EXAM QUESTIONS
AND CORRECT DETAILED ANSWERS (VERIFIED ANSWERS)
|ALREADY GRADED A+
Question 1
What material should be used for seating brushes?
A) Emery cloth
B) Fine-grit sandpaper
C) Aluminum oxide paper
D) Coarse sandpaper
E) Steel wool
Correct Answer: B) Sandpaper
Rationale: Sandpaper, typically fine-grit, is used for seating brushes to ensure proper
contact and a good commutator film.
Question 2
If readings on a test meter appear to be inaccurate, what should you do first?
A) Replace the meter immediately.
B) Disregard the readings and use a different meter.
C) Check the meter's battery and lead connections.
D) Calibrate the meter with a known source.
E) Assume the circuit has a fault.
Correct Answer: C) Test meter
Rationale: When a test meter provides inaccurate readings, the first step is to check
its basic functionality, such as battery level and lead connections, before
considering more complex troubleshooting or replacement. The provided answer
"Test meter" implies checking the meter itself.
, Question 3
What type of machine converts mechanical energy into electrical energy?
A) Motor
B) Transformer
C) Inductor
D) Generator
E) Rectifier
Correct Answer: D) Generator
Rationale: A generator is defined as a machine that converts mechanical energy into
electrical energy.
Question 4
What is the purpose of interpoles in a motor?
A) To increase the overall speed of the motor.
B) To reduce friction in the bearings.
C) To help prevent neutral planes from shifting.
D) To regulate the motor's temperature.
E) To improve the motor's power factor.
Correct Answer: C) Help prevent neutral plains from shifting
Rationale: Interpoles are used in DC motors to counteract armature reaction,
thereby preventing the neutral plane from shifting and improving commutation.
Question 5
In a basic loop circuit, a generator armature supplies DC power to what component of a DC
elevator hoist motor?
AND CORRECT DETAILED ANSWERS (VERIFIED ANSWERS)
|ALREADY GRADED A+
Question 1
What material should be used for seating brushes?
A) Emery cloth
B) Fine-grit sandpaper
C) Aluminum oxide paper
D) Coarse sandpaper
E) Steel wool
Correct Answer: B) Sandpaper
Rationale: Sandpaper, typically fine-grit, is used for seating brushes to ensure proper
contact and a good commutator film.
Question 2
If readings on a test meter appear to be inaccurate, what should you do first?
A) Replace the meter immediately.
B) Disregard the readings and use a different meter.
C) Check the meter's battery and lead connections.
D) Calibrate the meter with a known source.
E) Assume the circuit has a fault.
Correct Answer: C) Test meter
Rationale: When a test meter provides inaccurate readings, the first step is to check
its basic functionality, such as battery level and lead connections, before
considering more complex troubleshooting or replacement. The provided answer
"Test meter" implies checking the meter itself.
, Question 3
What type of machine converts mechanical energy into electrical energy?
A) Motor
B) Transformer
C) Inductor
D) Generator
E) Rectifier
Correct Answer: D) Generator
Rationale: A generator is defined as a machine that converts mechanical energy into
electrical energy.
Question 4
What is the purpose of interpoles in a motor?
A) To increase the overall speed of the motor.
B) To reduce friction in the bearings.
C) To help prevent neutral planes from shifting.
D) To regulate the motor's temperature.
E) To improve the motor's power factor.
Correct Answer: C) Help prevent neutral plains from shifting
Rationale: Interpoles are used in DC motors to counteract armature reaction,
thereby preventing the neutral plane from shifting and improving commutation.
Question 5
In a basic loop circuit, a generator armature supplies DC power to what component of a DC
elevator hoist motor?
