NCATT AET & ENDORSEMENT EXAM QUESTIONS
AND CORRECT ANSWERS (VERIFIED ANSWERS)
Q&A 2026/2027 |INSTANT DOWNLOAD PDF
Question 1. Which electrical quantity is measured in volts?
A. Current
B. Resistance
C. Voltage
D. Power
Correct Answer: C. Voltage
Rationale: Voltage is the electrical potential difference that
drives current through a circuit.
Question 2. What instrument is commonly used to measure
electrical resistance?
A. Clamp meter
B. Ammeter
C. Ohmmeter
D. Wattmeter
Correct Answer: C. Ohmmeter
Rationale: An ohmmeter measures the resistance of electrical
components and circuits.
Question 3. Ohm's Law states that:
,A. V = I × R
B. P = V × I
C. I = P × R
D. R = V × P
Correct Answer: A. V = I × R
Rationale: Ohm's Law relates voltage, current, and resistance.
Question 4. The SI unit of current is:
A. Volt
B. Ohm
C. Ampere
D. Watt
Correct Answer: C. Ampere
Rationale: Current is measured in amperes (amps).
Question 5. Which material is considered a good electrical
conductor?
A. Glass
B. Copper
C. Rubber
D. Plastic
Correct Answer: B. Copper
,Rationale: Copper has low resistance and excellent
conductivity.
Question 6. Which device protects a circuit from excessive
current?
A. Switch
B. Relay
C. Fuse
D. Capacitor
Correct Answer: C. Fuse
Rationale: A fuse opens the circuit when current exceeds its
rating.
Question 7. Power is measured in:
A. Amps
B. Volts
C. Watts
D. Ohms
Correct Answer: C. Watts
Rationale: Electrical power is expressed in watts.
Question 8. Which personal protective equipment is essential
when working around energized circuits?
, A. Sandals
B. Safety glasses
C. Cotton hat
D. Shorts
Correct Answer: B. Safety glasses
Rationale: Eye protection reduces the risk of injury from
electrical hazards.
Question 9. A short circuit usually results in:
A. Reduced current
B. Increased resistance
C. Excessive current flow
D. Lower voltage only
Correct Answer: C. Excessive current flow
Rationale: A short circuit provides a low-resistance path
causing high current.
Question 10. Grounding primarily helps:
A. Increase voltage
B. Reduce resistance only
C. Improve safety
D. Increase current
Correct Answer: C. Improve safety
AND CORRECT ANSWERS (VERIFIED ANSWERS)
Q&A 2026/2027 |INSTANT DOWNLOAD PDF
Question 1. Which electrical quantity is measured in volts?
A. Current
B. Resistance
C. Voltage
D. Power
Correct Answer: C. Voltage
Rationale: Voltage is the electrical potential difference that
drives current through a circuit.
Question 2. What instrument is commonly used to measure
electrical resistance?
A. Clamp meter
B. Ammeter
C. Ohmmeter
D. Wattmeter
Correct Answer: C. Ohmmeter
Rationale: An ohmmeter measures the resistance of electrical
components and circuits.
Question 3. Ohm's Law states that:
,A. V = I × R
B. P = V × I
C. I = P × R
D. R = V × P
Correct Answer: A. V = I × R
Rationale: Ohm's Law relates voltage, current, and resistance.
Question 4. The SI unit of current is:
A. Volt
B. Ohm
C. Ampere
D. Watt
Correct Answer: C. Ampere
Rationale: Current is measured in amperes (amps).
Question 5. Which material is considered a good electrical
conductor?
A. Glass
B. Copper
C. Rubber
D. Plastic
Correct Answer: B. Copper
,Rationale: Copper has low resistance and excellent
conductivity.
Question 6. Which device protects a circuit from excessive
current?
A. Switch
B. Relay
C. Fuse
D. Capacitor
Correct Answer: C. Fuse
Rationale: A fuse opens the circuit when current exceeds its
rating.
Question 7. Power is measured in:
A. Amps
B. Volts
C. Watts
D. Ohms
Correct Answer: C. Watts
Rationale: Electrical power is expressed in watts.
Question 8. Which personal protective equipment is essential
when working around energized circuits?
, A. Sandals
B. Safety glasses
C. Cotton hat
D. Shorts
Correct Answer: B. Safety glasses
Rationale: Eye protection reduces the risk of injury from
electrical hazards.
Question 9. A short circuit usually results in:
A. Reduced current
B. Increased resistance
C. Excessive current flow
D. Lower voltage only
Correct Answer: C. Excessive current flow
Rationale: A short circuit provides a low-resistance path
causing high current.
Question 10. Grounding primarily helps:
A. Increase voltage
B. Reduce resistance only
C. Improve safety
D. Increase current
Correct Answer: C. Improve safety
