CWEA E/I Level 3 Exam Prep 2026: 200 Actual
Questions & Verified Detailed Answers
QUESTION 1
What is the current when a circuit has a 1,500-watt load and a power factor of 86%,
and operates from a three-phase 230-volt source?
A) 9.7 amps
B) 6.5 amps
C) 4.4 amps
D) 3.8 amps
Correct Answer: C
Rationale: Using the three-phase power formula I = P / (V × PF × √3), the calculation
yields 1,500 / (230 × 0.86 × 1.732) = 4.38 amps. This is the correct application of the
three-phase power formula.
QUESTION 2
What is the amp-load of a three-phase, 0.5-hp, 230-volt motor with an efficiency
rating of 92% and a power factor of 80%?
A) 1.27 amps
B) 1.19 amps
C) 2.55 amps
D) 4.41 amps
Correct Answer: A
Rationale: I = (HP × 746) / (V × PF × Eff × √3). 0.5 × 746 = 373 / (230 × 0.80 × 0.92
× 1.732) = 1.27 amps.
QUESTION 3
A three-phase, 460-volt motor draws a current of 52 amperes. The motor has an
efficiency rating of 94% and a power factor of 80%. What is the horsepower?
A) 24.1 hp
B) 41.7 hp
C) 50.0 hp
D) 73.8 hp
,Correct Answer: B
Rationale: HP = (V × I × PF × Eff × √3) / 746. (460 × 52 × 0.80 × 0.94 × 1.732) / 746
= 41.7 hp.
QUESTION 4
A 115-volt, 2-KVA, single-phase generator operating at full load will deliver how
many amperes?
A) 0.23
B) 17.4
C) 57.5
D) 230
Correct Answer: B
Rationale: I = VA / V, 2, = 17.4 amperes.
QUESTION 5
A 120-volt AC circuit draws a current of 5 amperes. Determine the power
consumption.
A) 60 watts
B) 120 watts
C) 4.8 watts
D) 600 watts
Correct Answer: D
Rationale: P = V × I, 120 × 5 = 600 watts.
QUESTION 6
10°C is equal to how many degrees Fahrenheit?
A) 23.3°F
B) 50°F
C) 75.6°F
D) -47.6°F
,Correct Answer: B
Rationale: °F = (°C × 9/5) + 32, (10 × 1.8) + 32 = 50°F.
QUESTION 7
A 12V battery rated to provide 1 amp for 20 hours across a 2000W load. How long
will the battery continue to produce an output?
A) 10 hours
B) 100 hours
C) 20 hours
D) 40 hours
Correct Answer: B
Rationale: Battery capacity = 1 amp × 20 hours = 20 amp-hours. Current draw =
2000/12 = 166.7 amps. Time = 20 amp-hours / 0.2 amps = 100 hours.
QUESTION 8
What is the amperage of 1000 Watts pulled through 12.5 ohms?
A) 8.9 amps
B) 9.8 amps
C) 7.5 amps
D) 10.0 amps
Correct Answer: A
Rationale: I = √(P/R) = √(1000/12.5) = √80 = 8.94 amps.
QUESTION 9
If 17.32 volts are applied across a resistance of 50 ohms, how much power is
expended in the resistor?
A) 3.0 watts
B) 6.0 watts
C) 12.0 watts
D) 24.0 watts
, Correct Answer: B
Rationale: P = V²/R = 17.32²/50 = 299.98/50 = 6.0 watts.
QUESTION 10
A 150-watt, 120-volt load has what amp rating?
A) 1.00 amps
B) 1.25 amps
C) 1.50 amps
D) 1.75 amps
Correct Answer: B
Rationale: I = P/V = 150/120 = 1.25 amps.
QUESTION 11
How is true power expressed?
A) KVA
B) KW
C) KVAR
D) Volts
Correct Answer: B
Rationale: True power is expressed in kilowatts (KW). Apparent power is KVA, and
reactive power is KVAR.
QUESTION 12
Three resistors are wired in parallel on a battery: 5 ohms, 10 ohms, and 20 ohms.
What is the total current if the battery voltage is 12V?
A) 6.84 V
B) 8.40 A
C) 7.20 A
D) 9.60 A
Questions & Verified Detailed Answers
QUESTION 1
What is the current when a circuit has a 1,500-watt load and a power factor of 86%,
and operates from a three-phase 230-volt source?
A) 9.7 amps
B) 6.5 amps
C) 4.4 amps
D) 3.8 amps
Correct Answer: C
Rationale: Using the three-phase power formula I = P / (V × PF × √3), the calculation
yields 1,500 / (230 × 0.86 × 1.732) = 4.38 amps. This is the correct application of the
three-phase power formula.
QUESTION 2
What is the amp-load of a three-phase, 0.5-hp, 230-volt motor with an efficiency
rating of 92% and a power factor of 80%?
A) 1.27 amps
B) 1.19 amps
C) 2.55 amps
D) 4.41 amps
Correct Answer: A
Rationale: I = (HP × 746) / (V × PF × Eff × √3). 0.5 × 746 = 373 / (230 × 0.80 × 0.92
× 1.732) = 1.27 amps.
QUESTION 3
A three-phase, 460-volt motor draws a current of 52 amperes. The motor has an
efficiency rating of 94% and a power factor of 80%. What is the horsepower?
A) 24.1 hp
B) 41.7 hp
C) 50.0 hp
D) 73.8 hp
,Correct Answer: B
Rationale: HP = (V × I × PF × Eff × √3) / 746. (460 × 52 × 0.80 × 0.94 × 1.732) / 746
= 41.7 hp.
QUESTION 4
A 115-volt, 2-KVA, single-phase generator operating at full load will deliver how
many amperes?
A) 0.23
B) 17.4
C) 57.5
D) 230
Correct Answer: B
Rationale: I = VA / V, 2, = 17.4 amperes.
QUESTION 5
A 120-volt AC circuit draws a current of 5 amperes. Determine the power
consumption.
A) 60 watts
B) 120 watts
C) 4.8 watts
D) 600 watts
Correct Answer: D
Rationale: P = V × I, 120 × 5 = 600 watts.
QUESTION 6
10°C is equal to how many degrees Fahrenheit?
A) 23.3°F
B) 50°F
C) 75.6°F
D) -47.6°F
,Correct Answer: B
Rationale: °F = (°C × 9/5) + 32, (10 × 1.8) + 32 = 50°F.
QUESTION 7
A 12V battery rated to provide 1 amp for 20 hours across a 2000W load. How long
will the battery continue to produce an output?
A) 10 hours
B) 100 hours
C) 20 hours
D) 40 hours
Correct Answer: B
Rationale: Battery capacity = 1 amp × 20 hours = 20 amp-hours. Current draw =
2000/12 = 166.7 amps. Time = 20 amp-hours / 0.2 amps = 100 hours.
QUESTION 8
What is the amperage of 1000 Watts pulled through 12.5 ohms?
A) 8.9 amps
B) 9.8 amps
C) 7.5 amps
D) 10.0 amps
Correct Answer: A
Rationale: I = √(P/R) = √(1000/12.5) = √80 = 8.94 amps.
QUESTION 9
If 17.32 volts are applied across a resistance of 50 ohms, how much power is
expended in the resistor?
A) 3.0 watts
B) 6.0 watts
C) 12.0 watts
D) 24.0 watts
, Correct Answer: B
Rationale: P = V²/R = 17.32²/50 = 299.98/50 = 6.0 watts.
QUESTION 10
A 150-watt, 120-volt load has what amp rating?
A) 1.00 amps
B) 1.25 amps
C) 1.50 amps
D) 1.75 amps
Correct Answer: B
Rationale: I = P/V = 150/120 = 1.25 amps.
QUESTION 11
How is true power expressed?
A) KVA
B) KW
C) KVAR
D) Volts
Correct Answer: B
Rationale: True power is expressed in kilowatts (KW). Apparent power is KVA, and
reactive power is KVAR.
QUESTION 12
Three resistors are wired in parallel on a battery: 5 ohms, 10 ohms, and 20 ohms.
What is the total current if the battery voltage is 12V?
A) 6.84 V
B) 8.40 A
C) 7.20 A
D) 9.60 A
