LADWP ELECTRICAL CRAFT HELPER EXAM 2026
QUESTIONS AND VERIFIED ANSWERS WITH
DETAILED RATIONALES
SECTION 1: ELECTRICAL FUNDAMENTALS
QUESTION 1
What is the unit of electric current?
A) Volt
B) Ohm
C) Ampere
D) Watt
Answer: C) Ampere
Rationale: Electric current is measured in amperes (amps). Voltage is measured in
volts, resistance in ohms, and power in watts.
,QUESTION 2
What is the unit of electric power?
A) Volt
B) Ampere
C) Ohm
D) Watt
Answer: D) Watt
Rationale: Electric power is measured in watts. One watt equals one volt multiplied
by one ampere (P = V × I).
QUESTION 3
What is the total resistance of two 10-ohm resistors connected in series?
A) 5 ohms
B) 10 ohms
C) 20 ohms
D) 100 ohms
Answer: C) 20 ohms
Rationale: In a series circuit, total resistance is the sum of individual resistances:
R_total = R₁ + R₂ = 10 + 10 = 20 ohms.
QUESTION 4
,What is the total resistance of two 10-ohm resistors connected in parallel?
A) 5 ohms
B) 10 ohms
C) 20 ohms
D) 100 ohms
Answer: A) 5 ohms
Rationale: In a parallel circuit: 1/R_total = 1/R₁ + 1/R₂ = 1/10 + 1/10 = 2/10, so
R_total = 5 ohms.
QUESTION 5
What is the power consumed by a circuit with 120 volts and 5 amperes?
A) 60 watts
B) 120 watts
C) 600 watts
D) 1,200 watts
Answer: C) 600 watts
Rationale: Power = Voltage × Current = 120 V × 5 A = 600 watts.
QUESTION 6
A circuit has a voltage of 120 volts and a resistance of 60 ohms. What is the current?
, A) 0.5 A
B) 2 A
C) 60 A
D) 180 A
Answer: B) 2 A
Rationale: Using Ohm's Law: I = V / R = 120V / 60Ω = 2 A.
QUESTION 7
If a circuit has a current of 10A and a resistance of 12Ω, what is the voltage?
A) 0.83 V
B) 22 V
C) 120 V
D) 220 V
Answer: C) 120 V
Rationale: V = I × R = 10A × 12Ω = 120 V.
QUESTION 8
What is the voltage drop across a 10-ohm resistor carrying 2 amperes of current?
A) 5 volts
B) 10 volts
QUESTIONS AND VERIFIED ANSWERS WITH
DETAILED RATIONALES
SECTION 1: ELECTRICAL FUNDAMENTALS
QUESTION 1
What is the unit of electric current?
A) Volt
B) Ohm
C) Ampere
D) Watt
Answer: C) Ampere
Rationale: Electric current is measured in amperes (amps). Voltage is measured in
volts, resistance in ohms, and power in watts.
,QUESTION 2
What is the unit of electric power?
A) Volt
B) Ampere
C) Ohm
D) Watt
Answer: D) Watt
Rationale: Electric power is measured in watts. One watt equals one volt multiplied
by one ampere (P = V × I).
QUESTION 3
What is the total resistance of two 10-ohm resistors connected in series?
A) 5 ohms
B) 10 ohms
C) 20 ohms
D) 100 ohms
Answer: C) 20 ohms
Rationale: In a series circuit, total resistance is the sum of individual resistances:
R_total = R₁ + R₂ = 10 + 10 = 20 ohms.
QUESTION 4
,What is the total resistance of two 10-ohm resistors connected in parallel?
A) 5 ohms
B) 10 ohms
C) 20 ohms
D) 100 ohms
Answer: A) 5 ohms
Rationale: In a parallel circuit: 1/R_total = 1/R₁ + 1/R₂ = 1/10 + 1/10 = 2/10, so
R_total = 5 ohms.
QUESTION 5
What is the power consumed by a circuit with 120 volts and 5 amperes?
A) 60 watts
B) 120 watts
C) 600 watts
D) 1,200 watts
Answer: C) 600 watts
Rationale: Power = Voltage × Current = 120 V × 5 A = 600 watts.
QUESTION 6
A circuit has a voltage of 120 volts and a resistance of 60 ohms. What is the current?
, A) 0.5 A
B) 2 A
C) 60 A
D) 180 A
Answer: B) 2 A
Rationale: Using Ohm's Law: I = V / R = 120V / 60Ω = 2 A.
QUESTION 7
If a circuit has a current of 10A and a resistance of 12Ω, what is the voltage?
A) 0.83 V
B) 22 V
C) 120 V
D) 220 V
Answer: C) 120 V
Rationale: V = I × R = 10A × 12Ω = 120 V.
QUESTION 8
What is the voltage drop across a 10-ohm resistor carrying 2 amperes of current?
A) 5 volts
B) 10 volts
