NEVADA C-2 ELECTRICAL CONTRACTOR
EXAM 2026/2027 TEST BANK | 300
REAL EXAM QUESTIONS WITH
CORRECT VERIFIED ANSWERS &
DETAILED RATIONALES | ALREADY
GRADED A+ | COMPLETE LICENSE
EXAM PREP (MOST RECENT!!)
Section 1: General Electrical Knowledge & Theory
(Questions 1–50)
1. What is the basic unit of electrical resistance?
A. Volt
B. Ampere
C. Ohm
D. Watt
Answer: C. Ohm. Resistance is measured in ohms (Ω).
2. Which formula represents Ohm's Law?
A. P = IE
B. E = IR
C. R = IP
D. I = ER
Answer: B. E = IR. Ohm's Law states that voltage equals current multiplied by
resistance.
3. A 120-volt circuit has 20 ohms of resistance. What current flows?
A. 2 A
B. 4 A
,C. 6 A
D. 10 A
Answer: C. 6 A. I = E / R = = 6 amperes.
4. A 240-V load draws 10 A. What is its power consumption?
A. 240 W
B. 1,200 W
C. 2,400 W
D. 24,000 W
Answer: C. 2,400 W. P = E × I = 240 × 10 = 2,400 watts.
5. In a series circuit, which quantity is the same through every component?
A. Voltage
B. Resistance
C. Current
D. Power
Answer: C. Current. A series circuit provides only one path for current.
6. In a parallel circuit, which quantity is the same across each branch connected
directly across the source?
A. Current
B. Voltage
C. Resistance
D. Power
Answer: B. Voltage. Parallel branches are connected across the same two electrical
points.
7. What happens to total resistance when another resistor is added in parallel?
A. It always increases
B. It remains unchanged
C. It decreases
D. It becomes infinite
Answer: C. It decreases. Adding a parallel current path lowers the equivalent resistance.
8. What is the unit of electrical power?
A. Ohm
B. Watt
,C. Coulomb
D. Henry
Answer: B. Watt. Electrical power is measured in watts.
9. What is the approximate current of a 1,500-W, 120-V resistive load?
A. 8.0 A
B. 10.0 A
C. 12.5 A
D. 15.0 A
Answer: C. 12.5 A. I = P / E = 1, = 12.5 A.
10. Which device is primarily used to measure current?
A. Voltmeter
B. Ammeter
C. Ohmmeter
D. Megohmmeter
Answer: B. Ammeter. An ammeter measures current in amperes.
11. How should an ammeter normally be connected to measure circuit current?
A. In parallel
B. In series
C. Across the source
D. Between neutral and ground
Answer: B. In series. Current must pass through the meter to be measured.
12. How is a voltmeter normally connected?
A. In series
B. In parallel
C. Only to the grounding electrode
D. In series with the neutral
Answer: B. In parallel. A voltmeter measures electrical potential difference between two
points.
13. What is the unit of measurement for electrical current?
A. Volt
B. Ampere
, C. Ohm
D. Watt
Answer: B. Ampere. The ampere (amp) is the unit of measurement for electrical current.
14. Ohm's Law states that voltage is equal to:
A. Current divided by resistance
B. Current multiplied by resistance
C. Resistance divided by current
D. Power divided by current
Answer: B. Current multiplied by resistance. V = I × R.
15. What is the formula for calculating power in a DC circuit?
A. P = I × R
B. P = V × I
C. P = V × R
D. P = I² × V
Answer: B. P = V × I. Power (in watts) is calculated as voltage times current.
16. In a series circuit, the total resistance is:
A. Equal to the lowest resistance
B. Equal to the highest resistance
C. The sum of all individual resistances
D. The reciprocal of the sum of reciprocals
Answer: C. The sum of all individual resistances. R_total = R₁ + R₂ + R₃ + ...
17. In a parallel circuit, the total resistance is:
A. Equal to the sum of all resistances
B. Always greater than the largest resistance
C. Always less than the smallest resistance
D. Equal to the largest resistance
Answer: C. Always less than the smallest resistance.
18. A 480-volt, three-phase load draws 72 amperes at a lagging power factor of
0.86. What is the real power of this load?
A. 29.7 kW
B. 51.5 kW
EXAM 2026/2027 TEST BANK | 300
REAL EXAM QUESTIONS WITH
CORRECT VERIFIED ANSWERS &
DETAILED RATIONALES | ALREADY
GRADED A+ | COMPLETE LICENSE
EXAM PREP (MOST RECENT!!)
Section 1: General Electrical Knowledge & Theory
(Questions 1–50)
1. What is the basic unit of electrical resistance?
A. Volt
B. Ampere
C. Ohm
D. Watt
Answer: C. Ohm. Resistance is measured in ohms (Ω).
2. Which formula represents Ohm's Law?
A. P = IE
B. E = IR
C. R = IP
D. I = ER
Answer: B. E = IR. Ohm's Law states that voltage equals current multiplied by
resistance.
3. A 120-volt circuit has 20 ohms of resistance. What current flows?
A. 2 A
B. 4 A
,C. 6 A
D. 10 A
Answer: C. 6 A. I = E / R = = 6 amperes.
4. A 240-V load draws 10 A. What is its power consumption?
A. 240 W
B. 1,200 W
C. 2,400 W
D. 24,000 W
Answer: C. 2,400 W. P = E × I = 240 × 10 = 2,400 watts.
5. In a series circuit, which quantity is the same through every component?
A. Voltage
B. Resistance
C. Current
D. Power
Answer: C. Current. A series circuit provides only one path for current.
6. In a parallel circuit, which quantity is the same across each branch connected
directly across the source?
A. Current
B. Voltage
C. Resistance
D. Power
Answer: B. Voltage. Parallel branches are connected across the same two electrical
points.
7. What happens to total resistance when another resistor is added in parallel?
A. It always increases
B. It remains unchanged
C. It decreases
D. It becomes infinite
Answer: C. It decreases. Adding a parallel current path lowers the equivalent resistance.
8. What is the unit of electrical power?
A. Ohm
B. Watt
,C. Coulomb
D. Henry
Answer: B. Watt. Electrical power is measured in watts.
9. What is the approximate current of a 1,500-W, 120-V resistive load?
A. 8.0 A
B. 10.0 A
C. 12.5 A
D. 15.0 A
Answer: C. 12.5 A. I = P / E = 1, = 12.5 A.
10. Which device is primarily used to measure current?
A. Voltmeter
B. Ammeter
C. Ohmmeter
D. Megohmmeter
Answer: B. Ammeter. An ammeter measures current in amperes.
11. How should an ammeter normally be connected to measure circuit current?
A. In parallel
B. In series
C. Across the source
D. Between neutral and ground
Answer: B. In series. Current must pass through the meter to be measured.
12. How is a voltmeter normally connected?
A. In series
B. In parallel
C. Only to the grounding electrode
D. In series with the neutral
Answer: B. In parallel. A voltmeter measures electrical potential difference between two
points.
13. What is the unit of measurement for electrical current?
A. Volt
B. Ampere
, C. Ohm
D. Watt
Answer: B. Ampere. The ampere (amp) is the unit of measurement for electrical current.
14. Ohm's Law states that voltage is equal to:
A. Current divided by resistance
B. Current multiplied by resistance
C. Resistance divided by current
D. Power divided by current
Answer: B. Current multiplied by resistance. V = I × R.
15. What is the formula for calculating power in a DC circuit?
A. P = I × R
B. P = V × I
C. P = V × R
D. P = I² × V
Answer: B. P = V × I. Power (in watts) is calculated as voltage times current.
16. In a series circuit, the total resistance is:
A. Equal to the lowest resistance
B. Equal to the highest resistance
C. The sum of all individual resistances
D. The reciprocal of the sum of reciprocals
Answer: C. The sum of all individual resistances. R_total = R₁ + R₂ + R₃ + ...
17. In a parallel circuit, the total resistance is:
A. Equal to the sum of all resistances
B. Always greater than the largest resistance
C. Always less than the smallest resistance
D. Equal to the largest resistance
Answer: C. Always less than the smallest resistance.
18. A 480-volt, three-phase load draws 72 amperes at a lagging power factor of
0.86. What is the real power of this load?
A. 29.7 kW
B. 51.5 kW
