Arizona CR-11 Electrical Contractor Exam — 200 Practice Questions with Verified Answers &
Rationales (2026 Q&A)
Exam Overview
The Arizona CR-11 (C-11) Electrical Contractor license is a rigorous credential administered by
the Arizona Registrar of Contractors (ROC) through PSI testing.
Exam Format:
- Number of Questions: 110 questions
- Time Allowed: 240 minutes (4 hours)
- Passing Score: 70% (77 correct answers out of 110)
- Exam Type: Open-book (specific reference materials allowed)
Licensing Scope:
The CR-11 license covers the installation, alteration, and repair of wiring and electrical
equipment used in the generating, transmitting, or utilization of electrical energy less than 600
volts. This includes commercial and residential electrical work, overhead and underground
distribution systems, and all wiring in or on buildings of less than 600 volts.
Table of Contents
| Topic | Questions |
|-------|-----------|
| Topic 1: General Electrical Knowledge & Theory | 1–30 |
| Topic 2: National Electrical Code (NEC) Fundamentals | 31–55 |
| Topic 3: Services, Feeders & Branch Circuits | 56–75 |
,| Topic 4: Conductors, Raceways & Wiring Methods | 76–95 |
| Topic 5: Grounding & Bonding | 96–115 |
| Topic 6: Overcurrent Protection | 116–130 |
| Topic 7: Motors & Controls | 131–145 |
| Topic 8: Transformers | 146–155 |
| Topic 9: Equipment for General Use | 156–165 |
| Topic 10: Safety (OSHA & Electrical Hazards) | 166–180 |
| Topic 11: Arizona ROC Laws & Contractor Responsibilities | 181–190 |
| Topic 12: Load Calculations & Voltage Drop | 191–200 |
Topic 1: General Electrical Knowledge & Theory (Questions 1–30)
1. What is the primary purpose of a circuit breaker?
A) Increase voltage
B) Protect circuits from overloads and short circuits
C) Store electrical energy
D) Convert AC to DC
Answer: B
Rationale: Circuit breakers are safety devices designed to automatically interrupt current flow
when an overload or short circuit occurs, preventing damage, fire, and electrical hazards.
---
,2. Ohm's Law is expressed as:
A) P = IV
B) V = IR
C) I = PR
D) R = VI²
Answer: B
Rationale: Ohm's Law defines the relationship between voltage (V), current (I), and resistance
(R), forming the basis of electrical calculations in circuit design and troubleshooting.
---
3. The unit of electrical resistance is:
A) Volt
B) Ampere
C) Ohm
D) Watt
Answer: C
Rationale: Resistance is measured in ohms (Ω), which indicates how much a material opposes
the flow of electrical current.
---
4. A grounded conductor is commonly known as:
, A) Hot wire
B) Neutral wire
C) Load wire
D) Bond wire
Answer: B
Rationale: The neutral (grounded conductor) carries current back to the source and is typically
connected to earth ground at the service entrance.
---
5. What does GFCI stand for?
A) Ground Fault Circuit Indicator
B) Ground Fault Circuit Interrupter
C) General Flow Current Insulator
D) Ground Feed Circuit Interface
Answer: B
Rationale: A GFCI protects people from electric shock by shutting off power when it detects
leakage current to ground.
---
6. What is the primary purpose of grounding in an electrical system?
Rationales (2026 Q&A)
Exam Overview
The Arizona CR-11 (C-11) Electrical Contractor license is a rigorous credential administered by
the Arizona Registrar of Contractors (ROC) through PSI testing.
Exam Format:
- Number of Questions: 110 questions
- Time Allowed: 240 minutes (4 hours)
- Passing Score: 70% (77 correct answers out of 110)
- Exam Type: Open-book (specific reference materials allowed)
Licensing Scope:
The CR-11 license covers the installation, alteration, and repair of wiring and electrical
equipment used in the generating, transmitting, or utilization of electrical energy less than 600
volts. This includes commercial and residential electrical work, overhead and underground
distribution systems, and all wiring in or on buildings of less than 600 volts.
Table of Contents
| Topic | Questions |
|-------|-----------|
| Topic 1: General Electrical Knowledge & Theory | 1–30 |
| Topic 2: National Electrical Code (NEC) Fundamentals | 31–55 |
| Topic 3: Services, Feeders & Branch Circuits | 56–75 |
,| Topic 4: Conductors, Raceways & Wiring Methods | 76–95 |
| Topic 5: Grounding & Bonding | 96–115 |
| Topic 6: Overcurrent Protection | 116–130 |
| Topic 7: Motors & Controls | 131–145 |
| Topic 8: Transformers | 146–155 |
| Topic 9: Equipment for General Use | 156–165 |
| Topic 10: Safety (OSHA & Electrical Hazards) | 166–180 |
| Topic 11: Arizona ROC Laws & Contractor Responsibilities | 181–190 |
| Topic 12: Load Calculations & Voltage Drop | 191–200 |
Topic 1: General Electrical Knowledge & Theory (Questions 1–30)
1. What is the primary purpose of a circuit breaker?
A) Increase voltage
B) Protect circuits from overloads and short circuits
C) Store electrical energy
D) Convert AC to DC
Answer: B
Rationale: Circuit breakers are safety devices designed to automatically interrupt current flow
when an overload or short circuit occurs, preventing damage, fire, and electrical hazards.
---
,2. Ohm's Law is expressed as:
A) P = IV
B) V = IR
C) I = PR
D) R = VI²
Answer: B
Rationale: Ohm's Law defines the relationship between voltage (V), current (I), and resistance
(R), forming the basis of electrical calculations in circuit design and troubleshooting.
---
3. The unit of electrical resistance is:
A) Volt
B) Ampere
C) Ohm
D) Watt
Answer: C
Rationale: Resistance is measured in ohms (Ω), which indicates how much a material opposes
the flow of electrical current.
---
4. A grounded conductor is commonly known as:
, A) Hot wire
B) Neutral wire
C) Load wire
D) Bond wire
Answer: B
Rationale: The neutral (grounded conductor) carries current back to the source and is typically
connected to earth ground at the service entrance.
---
5. What does GFCI stand for?
A) Ground Fault Circuit Indicator
B) Ground Fault Circuit Interrupter
C) General Flow Current Insulator
D) Ground Feed Circuit Interface
Answer: B
Rationale: A GFCI protects people from electric shock by shutting off power when it detects
leakage current to ground.
---
6. What is the primary purpose of grounding in an electrical system?
