AK INDUSTRIAL ELECTRICAL CONTRACTOR EXAM
QUESTIONS AND CORRECT ANSWERS (VERIFIED
ANSWERS) Q&A 2027 |INSTANT DOWNLAD PDF
1. What is the basic unit of electrical current?
A. Volt
B. Ohm
C. Ampere
D. Watt
Correct answer: C. Ampere
Rationale: The ampere (A) is the SI unit used to measure
electric current.
2. Which formula represents Ohm's Law?
A. P = VI
B. V = IR
C. I = PR
D. R = VP
Correct answer: B. V = IR
Rationale: Ohm's Law states that voltage equals current
multiplied by resistance.
3. A 120-V circuit has a resistance of 20 Ω. What current flows
through the circuit?
A. 2 A
,B. 4 A
C. 6 A
D. 10 A
Correct answer: C. 6 A
Rationale: Using I = V/R, 120 ÷ 20 = 6 A.
4. What is the unit of electrical resistance?
A. Watt
B. Ohm
C. Ampere
D. Volt
Correct answer: B. Ohm
Rationale: Resistance is measured in ohms (Ω).
5. Which instrument is normally used to measure voltage?
A. Ammeter
B. Ohmmeter
C. Voltmeter
D. Megger only
Correct answer: C. Voltmeter
Rationale: A voltmeter measures potential difference between
two points.
,6. How should an ammeter normally be connected to measure
current?
A. In parallel
B. In series
C. Across the transformer
D. To ground only
Correct answer: B. In series
Rationale: Current must flow through the meter, so an
ammeter is connected in series with the circuit.
7. What does electrical power measure?
A. Opposition to current
B. Rate of electrical energy use
C. Conductor length
D. Circuit frequency
Correct answer: B. Rate of electrical energy use
Rationale: Electrical power is the rate at which electrical energy
is consumed or converted.
8. What is the unit of electrical power?
A. Watt
B. Ohm
C. Ampere
D. Hertz
, Correct answer: A. Watt
Rationale: The watt (W) is the standard unit of electrical power.
9. Which formula is commonly used to calculate single-phase
electrical power?
A. P = VI
B. P = V/R
C. P = I/R
D. P = R/V
Correct answer: A. P = VI
Rationale: For a basic single-phase circuit, power equals voltage
multiplied by current.
10. What is the primary purpose of a circuit breaker?
A. Increase voltage
B. Store electricity
C. Interrupt excessive current
D. Improve power factor
Correct answer: C. Interrupt excessive current
Rationale: Circuit breakers open a circuit when an overcurrent
condition occurs within their operating characteristics.
11. What is the primary function of a fuse?
A. Increase current
QUESTIONS AND CORRECT ANSWERS (VERIFIED
ANSWERS) Q&A 2027 |INSTANT DOWNLAD PDF
1. What is the basic unit of electrical current?
A. Volt
B. Ohm
C. Ampere
D. Watt
Correct answer: C. Ampere
Rationale: The ampere (A) is the SI unit used to measure
electric current.
2. Which formula represents Ohm's Law?
A. P = VI
B. V = IR
C. I = PR
D. R = VP
Correct answer: B. V = IR
Rationale: Ohm's Law states that voltage equals current
multiplied by resistance.
3. A 120-V circuit has a resistance of 20 Ω. What current flows
through the circuit?
A. 2 A
,B. 4 A
C. 6 A
D. 10 A
Correct answer: C. 6 A
Rationale: Using I = V/R, 120 ÷ 20 = 6 A.
4. What is the unit of electrical resistance?
A. Watt
B. Ohm
C. Ampere
D. Volt
Correct answer: B. Ohm
Rationale: Resistance is measured in ohms (Ω).
5. Which instrument is normally used to measure voltage?
A. Ammeter
B. Ohmmeter
C. Voltmeter
D. Megger only
Correct answer: C. Voltmeter
Rationale: A voltmeter measures potential difference between
two points.
,6. How should an ammeter normally be connected to measure
current?
A. In parallel
B. In series
C. Across the transformer
D. To ground only
Correct answer: B. In series
Rationale: Current must flow through the meter, so an
ammeter is connected in series with the circuit.
7. What does electrical power measure?
A. Opposition to current
B. Rate of electrical energy use
C. Conductor length
D. Circuit frequency
Correct answer: B. Rate of electrical energy use
Rationale: Electrical power is the rate at which electrical energy
is consumed or converted.
8. What is the unit of electrical power?
A. Watt
B. Ohm
C. Ampere
D. Hertz
, Correct answer: A. Watt
Rationale: The watt (W) is the standard unit of electrical power.
9. Which formula is commonly used to calculate single-phase
electrical power?
A. P = VI
B. P = V/R
C. P = I/R
D. P = R/V
Correct answer: A. P = VI
Rationale: For a basic single-phase circuit, power equals voltage
multiplied by current.
10. What is the primary purpose of a circuit breaker?
A. Increase voltage
B. Store electricity
C. Interrupt excessive current
D. Improve power factor
Correct answer: C. Interrupt excessive current
Rationale: Circuit breakers open a circuit when an overcurrent
condition occurs within their operating characteristics.
11. What is the primary function of a fuse?
A. Increase current
