Arizona Contractor License CR-67
UPDATED QUESTIONS AND CORRECT
ANSWERS
Alternating Current (AC) always flows one way then the other? - CORRECT
ANSWER True. AC always flows one way then the other.
The frequency of AC is measured in? - CORRECT ANSWER Measured in hertz Hz
What refers to a voltage that can convey information? - CORRECT
ANSWER Electrical Signal
What refers to the maximum voltage that can be reached by a signal? - CORRECT
ANSWER Amplitude
Electricity may flow only when? - CORRECT ANSWER There has to be a for it to
return making a complete circuit
What is the return path for electrical power to flow back to the service panel? - CORRECT
ANSWER Neutral
The live wire is always ungrounded? - CORRECT ANSWER True. They are very hot
caring electrical power
A ground electrode conductor originates at the neutral or equipment ground bus of the service
panel? - CORRECT ANSWER True
A ground electrode should not make contact with the earth? - CORRECT
ANSWER False
,What is the difference between watts and voltage? - CORRECT ANSWER Watts are
the measure of power. Voltage is the measure of potential energy.
You should size conductors no less ______ of the continuous loads plus _________ of the
non-continuous loads,. - CORRECT ANSWER 125% / 100%
Conductor sizes are often expressed using? - CORRECT ANSWER American Wire
Gage (AWG)
What refers to the allowable current-carrying capacity of a conductor? - CORRECT
ANSWER Ampacity
The insulation type determines the areas where electrical wires can and cannot used? -
CORRECT ANSWER Yes, the type of insulation on an electrical wire does determine
the environments where it can be safely used. Different insulation materials are designed to
withstand different conditions, such as moisture, temperature, chemicals, and UV exposure.
RHH wires use rubber insulation that is high heat resistant and is good in? - CORRECT
ANSWER Suitable for dry locations
RHW-2 wires use the rubber insulation but are suitable for wet locations? - CORRECT
ANSWER Yes, RHW-2 wires utilize rubber insulation and are specifically designed for
use in wet locations. The "W" in RHW-2 indicates moisture resistance, making it suitable for
environments where dampness or water exposure is possible.
What cables can be used inside wall, ceiling or under the floor. - CORRECT
ANSWER Non-metallic (NM)
What cables are most appropriate for damp areas? - CORRECT ANSWER For damp
locations, cables like THW (Thermoplastic, Heat and Water Resistant), THWN
(Thermoplastic, Heat and Water Resistant), THWN-2 (Thermoplastic, Heat and Water
Resistant, with higher temperature rating), RHW (Rubber, Heat and Water Resistant), and
RHW-2 (Rubber, Heat and Water Resistant, with higher temperature rating) are suitable.
, These cables are designed to withstand moisture and are commonly used in environments
with moderate degrees of moisture
THWN means? - CORRECT ANSWER T: Thermoplastic (refers to the insulation
type).
H: High Heat-resistant.
W: Water-resistant.
N: Nylon-coated (refers to the outer protective layer).
An insulated grounded conductor which is ____ AWG or below should be identified by a
continuous white or gray outer finish. - CORRECT ANSWER 6 AWG
What is the amount of voltage measured between any two line conductors of a balanced
three-phase system. - CORRECT ANSWER Line voltage
What describes the voltage measured across any one component of a balanced three-phase
system. - CORRECT ANSWER Phase Voltage
A _____________ is an unintentional mess up in electrical systems. - CORRECT
ANSWER Short Circuit
An effective Ground-Fault current path is? - CORRECT ANSWER An effective
ground fault current path is a deliberately designed, low-impedance, electrically conductive
pathway that carries fault current from the point of a ground fault to the electrical supply
source. This path facilitates the operation of overcurrent protective devices (like fuses and
circuit breakers) to safely clear the fault.
GFCI is never sensitive to small "leaks" of current - CORRECT ANSWER False. In
fact, they are designed to be very sensitive, detecting current imbalances as small as 4-6
milliamps. This sensitivity is crucial for preventing electric shocks caused by ground faults
Grounding and bonding means exactly the same thing? - CORRECT ANSWER No,
grounding and bonding are distinct electrical safety concepts, though they work together.
UPDATED QUESTIONS AND CORRECT
ANSWERS
Alternating Current (AC) always flows one way then the other? - CORRECT
ANSWER True. AC always flows one way then the other.
The frequency of AC is measured in? - CORRECT ANSWER Measured in hertz Hz
What refers to a voltage that can convey information? - CORRECT
ANSWER Electrical Signal
What refers to the maximum voltage that can be reached by a signal? - CORRECT
ANSWER Amplitude
Electricity may flow only when? - CORRECT ANSWER There has to be a for it to
return making a complete circuit
What is the return path for electrical power to flow back to the service panel? - CORRECT
ANSWER Neutral
The live wire is always ungrounded? - CORRECT ANSWER True. They are very hot
caring electrical power
A ground electrode conductor originates at the neutral or equipment ground bus of the service
panel? - CORRECT ANSWER True
A ground electrode should not make contact with the earth? - CORRECT
ANSWER False
,What is the difference between watts and voltage? - CORRECT ANSWER Watts are
the measure of power. Voltage is the measure of potential energy.
You should size conductors no less ______ of the continuous loads plus _________ of the
non-continuous loads,. - CORRECT ANSWER 125% / 100%
Conductor sizes are often expressed using? - CORRECT ANSWER American Wire
Gage (AWG)
What refers to the allowable current-carrying capacity of a conductor? - CORRECT
ANSWER Ampacity
The insulation type determines the areas where electrical wires can and cannot used? -
CORRECT ANSWER Yes, the type of insulation on an electrical wire does determine
the environments where it can be safely used. Different insulation materials are designed to
withstand different conditions, such as moisture, temperature, chemicals, and UV exposure.
RHH wires use rubber insulation that is high heat resistant and is good in? - CORRECT
ANSWER Suitable for dry locations
RHW-2 wires use the rubber insulation but are suitable for wet locations? - CORRECT
ANSWER Yes, RHW-2 wires utilize rubber insulation and are specifically designed for
use in wet locations. The "W" in RHW-2 indicates moisture resistance, making it suitable for
environments where dampness or water exposure is possible.
What cables can be used inside wall, ceiling or under the floor. - CORRECT
ANSWER Non-metallic (NM)
What cables are most appropriate for damp areas? - CORRECT ANSWER For damp
locations, cables like THW (Thermoplastic, Heat and Water Resistant), THWN
(Thermoplastic, Heat and Water Resistant), THWN-2 (Thermoplastic, Heat and Water
Resistant, with higher temperature rating), RHW (Rubber, Heat and Water Resistant), and
RHW-2 (Rubber, Heat and Water Resistant, with higher temperature rating) are suitable.
, These cables are designed to withstand moisture and are commonly used in environments
with moderate degrees of moisture
THWN means? - CORRECT ANSWER T: Thermoplastic (refers to the insulation
type).
H: High Heat-resistant.
W: Water-resistant.
N: Nylon-coated (refers to the outer protective layer).
An insulated grounded conductor which is ____ AWG or below should be identified by a
continuous white or gray outer finish. - CORRECT ANSWER 6 AWG
What is the amount of voltage measured between any two line conductors of a balanced
three-phase system. - CORRECT ANSWER Line voltage
What describes the voltage measured across any one component of a balanced three-phase
system. - CORRECT ANSWER Phase Voltage
A _____________ is an unintentional mess up in electrical systems. - CORRECT
ANSWER Short Circuit
An effective Ground-Fault current path is? - CORRECT ANSWER An effective
ground fault current path is a deliberately designed, low-impedance, electrically conductive
pathway that carries fault current from the point of a ground fault to the electrical supply
source. This path facilitates the operation of overcurrent protective devices (like fuses and
circuit breakers) to safely clear the fault.
GFCI is never sensitive to small "leaks" of current - CORRECT ANSWER False. In
fact, they are designed to be very sensitive, detecting current imbalances as small as 4-6
milliamps. This sensitivity is crucial for preventing electric shocks caused by ground faults
Grounding and bonding means exactly the same thing? - CORRECT ANSWER No,
grounding and bonding are distinct electrical safety concepts, though they work together.
