Page 1 of 180
Arizona CR-11 Electrical Contractor EXAM WITH 300
QUESTIONS AND CORRECT DETAILED SOLUTIONS WITH
RATIONALES LATEST UPDATED VERSION THIS YEAR
2026-2027
Question 1
Which of the following expressions correctly represents Ohm's Law for a DC circuit?
A) V = I × R
B) I = V × R
C) R = V ÷ I²
D) P = V ÷ I
Correct Answer: A
Rationale: Ohm's Law states that voltage (V) equals current (I) multiplied by resistance (R) in a
DC circuit.
Question 2
Which unit is used to measure electrical capacitance?
A) Ohm
B) Farad
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C) Henry
D) Siemens
Correct Answer: B
Rationale: Capacitance is measured in farads (F). Ohms measure resistance, henrys measure
inductance, and siemens measure conductance.
Question 3
In an AC circuit, apparent power (S) is measured in kVA. Which formula calculates S for a three-
phase system?
A) S = V × I × √3
B) S = V ÷ I
C) S = P × PF
D) S = V² ÷ R
Correct Answer: A
Rationale: Apparent power in a three-phase AC system equals line-to-line voltage times line
current times √3.
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Question 4
What is the primary purpose of a circuit breaker?
A) To measure voltage
B) To protect conductors from overcurrent
C) To regulate voltage
D) To store electrical energy
Correct Answer: B
Rationale: Circuit breakers are designed to protect conductors and equipment from damage
caused by overcurrent conditions such as overloads and short circuits.
Question 5
Power factor is defined as:
A) The ratio of true power to apparent power
B) The ratio of reactive power to apparent power
C) The ratio of voltage to current
D) The ratio of resistance to impedance
Correct Answer: A
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Rationale: Power factor (PF) is the ratio of true power (watts) to apparent power (volt-amperes)
in an AC circuit, ranging from 0 to 1.
Question 6
What is the color code for the equipment grounding conductor in a 120/240 V residential
system?
A) Black
B) White
C) Bare copper or green
D) Red
Correct Answer: C
Rationale: The equipment grounding conductor must be bare copper, green, or green with
yellow stripes per NEC requirements.
Question 7
In a series circuit, which of the following remains constant?
A) Voltage
Arizona CR-11 Electrical Contractor EXAM WITH 300
QUESTIONS AND CORRECT DETAILED SOLUTIONS WITH
RATIONALES LATEST UPDATED VERSION THIS YEAR
2026-2027
Question 1
Which of the following expressions correctly represents Ohm's Law for a DC circuit?
A) V = I × R
B) I = V × R
C) R = V ÷ I²
D) P = V ÷ I
Correct Answer: A
Rationale: Ohm's Law states that voltage (V) equals current (I) multiplied by resistance (R) in a
DC circuit.
Question 2
Which unit is used to measure electrical capacitance?
A) Ohm
B) Farad
, Page 2 of 180
C) Henry
D) Siemens
Correct Answer: B
Rationale: Capacitance is measured in farads (F). Ohms measure resistance, henrys measure
inductance, and siemens measure conductance.
Question 3
In an AC circuit, apparent power (S) is measured in kVA. Which formula calculates S for a three-
phase system?
A) S = V × I × √3
B) S = V ÷ I
C) S = P × PF
D) S = V² ÷ R
Correct Answer: A
Rationale: Apparent power in a three-phase AC system equals line-to-line voltage times line
current times √3.
, Page 3 of 180
Question 4
What is the primary purpose of a circuit breaker?
A) To measure voltage
B) To protect conductors from overcurrent
C) To regulate voltage
D) To store electrical energy
Correct Answer: B
Rationale: Circuit breakers are designed to protect conductors and equipment from damage
caused by overcurrent conditions such as overloads and short circuits.
Question 5
Power factor is defined as:
A) The ratio of true power to apparent power
B) The ratio of reactive power to apparent power
C) The ratio of voltage to current
D) The ratio of resistance to impedance
Correct Answer: A
, Page 4 of 180
Rationale: Power factor (PF) is the ratio of true power (watts) to apparent power (volt-amperes)
in an AC circuit, ranging from 0 to 1.
Question 6
What is the color code for the equipment grounding conductor in a 120/240 V residential
system?
A) Black
B) White
C) Bare copper or green
D) Red
Correct Answer: C
Rationale: The equipment grounding conductor must be bare copper, green, or green with
yellow stripes per NEC requirements.
Question 7
In a series circuit, which of the following remains constant?
A) Voltage
