ELECTRICAL TESTING TECHNICIAN (NETA LEVEL II–IV) LATEST 2026 UPDATE FAST
REVIWED FROM ACTUAL TEST 100 QUESTIONS AND 100% VERIFIED ANSWERS|
A+ GRADE Q&A | INSTANT DOWNLOAD PDF
1. What is the primary purpose of insulation resistance testing?
A. Measure current flow
B. Detect insulation degradation
C. Measure voltage drop
D. Determine power factor
Answer: B
Insulation resistance testing evaluates the condition of insulation and
identifies deterioration or moisture contamination.
2. Which instrument is used to perform a megger test?
A. Multimeter
B. Oscilloscope
C. Insulation resistance tester
D. Clamp meter
Answer: C
A megger is specifically designed to measure high resistance values of
insulation.
3. What does a low insulation resistance reading typically indicate?
A. Good insulation
B. Open circuit
C. Insulation breakdown
D. High voltage
Answer: C
Low resistance suggests leakage current due to damaged or degraded
insulation.
4. Polarization Index (PI) is the ratio of:
A. 1-minute to 10-minute resistance
B. 10-minute to 1-minute resistance
C. Voltage to current
, D. Power to resistance
Answer: B
PI compares insulation resistance over time to assess insulation quality.
5. A PI value greater than 2 generally indicates:
A. Poor insulation
B. Acceptable insulation
C. Short circuit
D. Open circuit
Answer: B
Higher PI values indicate stable and healthy insulation systems.
6. What is the purpose of a ground resistance test?
A. Measure voltage
B. Evaluate grounding system effectiveness
C. Detect short circuits
D. Measure capacitance
Answer: B
Ground resistance testing ensures proper dissipation of fault currents into
earth.
7. Which method is commonly used for ground resistance testing?
A. Fall-of-potential
B. Bridge method
C. Kelvin method
D. Wheatstone method
Answer: A
The fall-of-potential method is widely used for accurate ground testing.
8. What does a high ground resistance indicate?
A. Effective grounding
B. Poor grounding system
C. Low voltage
D. High current
, Answer: B
High resistance reduces fault current dissipation, posing safety risks.
9. What is the main function of a circuit breaker?
A. Increase voltage
B. Store energy
C. Interrupt fault current
D. Measure current
Answer: C
Circuit breakers protect systems by interrupting excessive current flow.
10.What is dielectric withstand testing used for?
A. Measure resistance
B. Verify insulation strength
C. Check continuity
D. Measure capacitance
Answer: B
It ensures insulation can handle operating voltages without failure.
11.Which test applies high voltage to equipment to check insulation integrity?
A. Continuity test
B. Hi-pot test
C. Load test
D. Ratio test
Answer: B
Hi-pot testing stresses insulation to reveal weaknesses.
12.What is the purpose of a transformer turns ratio test?
A. Measure insulation
B. Verify winding ratio
C. Measure power
D. Detect ground faults
Answer: B
It confirms correct voltage transformation ratios.
REVIWED FROM ACTUAL TEST 100 QUESTIONS AND 100% VERIFIED ANSWERS|
A+ GRADE Q&A | INSTANT DOWNLOAD PDF
1. What is the primary purpose of insulation resistance testing?
A. Measure current flow
B. Detect insulation degradation
C. Measure voltage drop
D. Determine power factor
Answer: B
Insulation resistance testing evaluates the condition of insulation and
identifies deterioration or moisture contamination.
2. Which instrument is used to perform a megger test?
A. Multimeter
B. Oscilloscope
C. Insulation resistance tester
D. Clamp meter
Answer: C
A megger is specifically designed to measure high resistance values of
insulation.
3. What does a low insulation resistance reading typically indicate?
A. Good insulation
B. Open circuit
C. Insulation breakdown
D. High voltage
Answer: C
Low resistance suggests leakage current due to damaged or degraded
insulation.
4. Polarization Index (PI) is the ratio of:
A. 1-minute to 10-minute resistance
B. 10-minute to 1-minute resistance
C. Voltage to current
, D. Power to resistance
Answer: B
PI compares insulation resistance over time to assess insulation quality.
5. A PI value greater than 2 generally indicates:
A. Poor insulation
B. Acceptable insulation
C. Short circuit
D. Open circuit
Answer: B
Higher PI values indicate stable and healthy insulation systems.
6. What is the purpose of a ground resistance test?
A. Measure voltage
B. Evaluate grounding system effectiveness
C. Detect short circuits
D. Measure capacitance
Answer: B
Ground resistance testing ensures proper dissipation of fault currents into
earth.
7. Which method is commonly used for ground resistance testing?
A. Fall-of-potential
B. Bridge method
C. Kelvin method
D. Wheatstone method
Answer: A
The fall-of-potential method is widely used for accurate ground testing.
8. What does a high ground resistance indicate?
A. Effective grounding
B. Poor grounding system
C. Low voltage
D. High current
, Answer: B
High resistance reduces fault current dissipation, posing safety risks.
9. What is the main function of a circuit breaker?
A. Increase voltage
B. Store energy
C. Interrupt fault current
D. Measure current
Answer: C
Circuit breakers protect systems by interrupting excessive current flow.
10.What is dielectric withstand testing used for?
A. Measure resistance
B. Verify insulation strength
C. Check continuity
D. Measure capacitance
Answer: B
It ensures insulation can handle operating voltages without failure.
11.Which test applies high voltage to equipment to check insulation integrity?
A. Continuity test
B. Hi-pot test
C. Load test
D. Ratio test
Answer: B
Hi-pot testing stresses insulation to reveal weaknesses.
12.What is the purpose of a transformer turns ratio test?
A. Measure insulation
B. Verify winding ratio
C. Measure power
D. Detect ground faults
Answer: B
It confirms correct voltage transformation ratios.
