NICET Electrical Power
Testing Level I Practice
Questions And Correct
Answers (Verified Answers)
Plus Rationale 2026 Q&A|
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Section 1 — Electrical Testing Fundamentals
1. What is the primary purpose of electrical power-system testing?
A. Increase system voltage
B. Reduce equipment weight
C. Verify equipment condition and proper operation
D. Eliminate preventive maintenance
Answer: C. Verify equipment condition and proper operation
Rationale: Testing helps determine whether electrical equipment is
installed correctly, operating as intended, and suitable for continued
service.
2. Which unit is used to measure electrical resistance?
A. Volt
B. Ampere
C. Watt
D. Ohm
,Answer: D. Ohm
Rationale: Resistance is measured in ohms (Ω).
3. Which instrument is normally used to measure insulation
resistance?
A. Wattmeter
B. Megohmmeter
C. Frequency meter
D. Phase-sequence indicator
Answer: B. Megohmmeter
Rationale: A megohmmeter, commonly called a megger, applies a DC
test voltage and measures high insulation resistance.
4. What does a voltmeter measure?
A. Current
B. Resistance
C. Potential difference
D. Power factor
Answer: C. Potential difference
Rationale: Voltage is the electrical potential difference between two
points.
5. What is the SI unit of electric current?
A. Ampere
B. Ohm
C. Volt
D. Joule
Answer: A. Ampere
Rationale: Electric current is measured in amperes (A).
,6. Which instrument should normally be connected in parallel with
a circuit when measuring voltage?
A. Ammeter
B. Voltmeter
C. Clamp-on current transformer
D. Megohmmeter only
Answer: B. Voltmeter
Rationale: A voltmeter measures the potential difference between
two points and is connected across the points.
7. Which instrument is normally connected in series to measure
current?
A. Ammeter
B. Voltmeter
C. Ohmmeter
D. Frequency meter
Answer: A. Ammeter
Rationale: An ammeter must carry the circuit current being
measured, so it is connected in series in conventional measurement.
8. What happens to current in a series circuit if resistance increases
while voltage remains constant?
A. Current increases
B. Current decreases
C. Current remains exactly the same
D. Current becomes alternating
Answer: B. Current decreases
Rationale: Ohm's law states I = V/R, so current decreases as
resistance increases when voltage is constant.
9. What is the basic equation for Ohm's law?
, A. P = VI
B. V = IR
C. E = mc²
D. Q = CV
Answer: B. V = IR
Rationale: Ohm's law relates voltage, current, and resistance as V =
IR.
10. Which quantity is measured in watts?
A. Apparent power
B. Reactive power
C. Real power
D. Resistance
Answer: C. Real power
Rationale: Real or active electrical power is measured in watts (W).
11. Apparent power in an AC system is commonly measured in:
A. Watts
B. VARs
C. Volt-amperes
D. Ohms
Answer: C. Volt-amperes
Rationale: Apparent power is measured in volt-amperes (VA), or
kVA/MVA for larger systems.
12. Reactive power is measured in:
A. VARs
B. Watts
C. Ohms
D. Coulombs
Answer: A. VARs
Testing Level I Practice
Questions And Correct
Answers (Verified Answers)
Plus Rationale 2026 Q&A|
Instant Download Pdf
Section 1 — Electrical Testing Fundamentals
1. What is the primary purpose of electrical power-system testing?
A. Increase system voltage
B. Reduce equipment weight
C. Verify equipment condition and proper operation
D. Eliminate preventive maintenance
Answer: C. Verify equipment condition and proper operation
Rationale: Testing helps determine whether electrical equipment is
installed correctly, operating as intended, and suitable for continued
service.
2. Which unit is used to measure electrical resistance?
A. Volt
B. Ampere
C. Watt
D. Ohm
,Answer: D. Ohm
Rationale: Resistance is measured in ohms (Ω).
3. Which instrument is normally used to measure insulation
resistance?
A. Wattmeter
B. Megohmmeter
C. Frequency meter
D. Phase-sequence indicator
Answer: B. Megohmmeter
Rationale: A megohmmeter, commonly called a megger, applies a DC
test voltage and measures high insulation resistance.
4. What does a voltmeter measure?
A. Current
B. Resistance
C. Potential difference
D. Power factor
Answer: C. Potential difference
Rationale: Voltage is the electrical potential difference between two
points.
5. What is the SI unit of electric current?
A. Ampere
B. Ohm
C. Volt
D. Joule
Answer: A. Ampere
Rationale: Electric current is measured in amperes (A).
,6. Which instrument should normally be connected in parallel with
a circuit when measuring voltage?
A. Ammeter
B. Voltmeter
C. Clamp-on current transformer
D. Megohmmeter only
Answer: B. Voltmeter
Rationale: A voltmeter measures the potential difference between
two points and is connected across the points.
7. Which instrument is normally connected in series to measure
current?
A. Ammeter
B. Voltmeter
C. Ohmmeter
D. Frequency meter
Answer: A. Ammeter
Rationale: An ammeter must carry the circuit current being
measured, so it is connected in series in conventional measurement.
8. What happens to current in a series circuit if resistance increases
while voltage remains constant?
A. Current increases
B. Current decreases
C. Current remains exactly the same
D. Current becomes alternating
Answer: B. Current decreases
Rationale: Ohm's law states I = V/R, so current decreases as
resistance increases when voltage is constant.
9. What is the basic equation for Ohm's law?
, A. P = VI
B. V = IR
C. E = mc²
D. Q = CV
Answer: B. V = IR
Rationale: Ohm's law relates voltage, current, and resistance as V =
IR.
10. Which quantity is measured in watts?
A. Apparent power
B. Reactive power
C. Real power
D. Resistance
Answer: C. Real power
Rationale: Real or active electrical power is measured in watts (W).
11. Apparent power in an AC system is commonly measured in:
A. Watts
B. VARs
C. Volt-amperes
D. Ohms
Answer: C. Volt-amperes
Rationale: Apparent power is measured in volt-amperes (VA), or
kVA/MVA for larger systems.
12. Reactive power is measured in:
A. VARs
B. Watts
C. Ohms
D. Coulombs
Answer: A. VARs
