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Arizona Contractor License CR-67 – Comprehensive Exam Study Guide Covering
License Requirements, Electrical Contracting Principles, Arizona Construction
Laws and Regulations, Safety Standards, Business Management, Estimating and
Project Management, Codes and Compliance, Contract Requirements, and
Contractor License Examination Preparation
1. What is the primary function of a neutral wire in an electrical system?
A) To carry current from the utility transformer to the service panel
B) To provide a path for electrical power to return to the service panel
C) To act as a backup conductor in case of overload
D) To increase the voltage in the circuit
CORRECT ANSWER → To provide a path for electrical power to return to the service panel
2. When sizing conductors for continuous loads, what percentage of the continuous load must be
used for proper sizing?
A) 100%
B) 110%
C) 120%
D) 125%
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CORRECT ANSWER → 125%
3. Which type of wire insulation is specifically suitable for use in wet locations and offers high
heat resistance?
A) THHN
B) RHH
C) RHW-2
D) TFFN
CORRECT ANSWER → RHW-2
4. What is the minimum headroom requirement for a typical workspace where the working
voltage is under 600V?
A) 1.5 meters
B) 2.0 meters
C) 2.5 meters
D) 3.0 meters
CORRECT ANSWER → 2.0 meters
5. Which type of cable is most appropriate for installation in damp areas such as underground or
wet environments?
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A) NM cable
B) UF cable
C) Romex cable
D) AC cable
CORRECT ANSWER → UF cable
6. What does the acronym THWN stand for when referring to conductor insulation types?
A) Thermoplastic High Wet Non-metallic
B) Thermoplastic Heat and Water Resistant Nylon
C) Flame Retardant, Heat Resistant, Moisture Resistant, Gasoline and Oil Resistant
D) Temperature High Wet Non-corrosive
CORRECT ANSWER → Flame Retardant, Heat Resistant, Moisture Resistant, Gasoline and Oil
Resistant
7. What is the maximum current that a 16 AWG conductor can have for overcurrent protection in
Class 1 circuits?
A) 7 amperes
B) 10 amperes
C) 15 amperes
D) 20 amperes
CORRECT ANSWER → 10 amperes
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8. What describes the voltage measured across any one component of a balanced three-phase
system?
A) Line voltage
B) Phase voltage
C) Ground voltage
D) Neutral voltage
CORRECT ANSWER → Phase Voltage
9. What is the minimum separation distance required between communications wires and electric
light or power conductors whenever practicable?
A) 2 feet
B) 4 feet
C) 6 feet
D) 8 feet
CORRECT ANSWER → 6 feet
10. What type of circuit must be used when a circuit controls equipment that can introduce a
direct life safety hazard?
A) Class 2
B) Class 3
Arizona Contractor License CR-67 – Comprehensive Exam Study Guide Covering
License Requirements, Electrical Contracting Principles, Arizona Construction
Laws and Regulations, Safety Standards, Business Management, Estimating and
Project Management, Codes and Compliance, Contract Requirements, and
Contractor License Examination Preparation
1. What is the primary function of a neutral wire in an electrical system?
A) To carry current from the utility transformer to the service panel
B) To provide a path for electrical power to return to the service panel
C) To act as a backup conductor in case of overload
D) To increase the voltage in the circuit
CORRECT ANSWER → To provide a path for electrical power to return to the service panel
2. When sizing conductors for continuous loads, what percentage of the continuous load must be
used for proper sizing?
A) 100%
B) 110%
C) 120%
D) 125%
,2
CORRECT ANSWER → 125%
3. Which type of wire insulation is specifically suitable for use in wet locations and offers high
heat resistance?
A) THHN
B) RHH
C) RHW-2
D) TFFN
CORRECT ANSWER → RHW-2
4. What is the minimum headroom requirement for a typical workspace where the working
voltage is under 600V?
A) 1.5 meters
B) 2.0 meters
C) 2.5 meters
D) 3.0 meters
CORRECT ANSWER → 2.0 meters
5. Which type of cable is most appropriate for installation in damp areas such as underground or
wet environments?
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A) NM cable
B) UF cable
C) Romex cable
D) AC cable
CORRECT ANSWER → UF cable
6. What does the acronym THWN stand for when referring to conductor insulation types?
A) Thermoplastic High Wet Non-metallic
B) Thermoplastic Heat and Water Resistant Nylon
C) Flame Retardant, Heat Resistant, Moisture Resistant, Gasoline and Oil Resistant
D) Temperature High Wet Non-corrosive
CORRECT ANSWER → Flame Retardant, Heat Resistant, Moisture Resistant, Gasoline and Oil
Resistant
7. What is the maximum current that a 16 AWG conductor can have for overcurrent protection in
Class 1 circuits?
A) 7 amperes
B) 10 amperes
C) 15 amperes
D) 20 amperes
CORRECT ANSWER → 10 amperes
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8. What describes the voltage measured across any one component of a balanced three-phase
system?
A) Line voltage
B) Phase voltage
C) Ground voltage
D) Neutral voltage
CORRECT ANSWER → Phase Voltage
9. What is the minimum separation distance required between communications wires and electric
light or power conductors whenever practicable?
A) 2 feet
B) 4 feet
C) 6 feet
D) 8 feet
CORRECT ANSWER → 6 feet
10. What type of circuit must be used when a circuit controls equipment that can introduce a
direct life safety hazard?
A) Class 2
B) Class 3
