ARIZONA CONTRACTOR LICENSE CR-67 QUESTIONS
AND ANSWERS
Alternating Current (AC) always flows one way then the other? - Answers - True. AC
always flows one way then the other.
The frequency of AC is measured in? - Answers - Measured in hertz Hz
What refers to a voltage can convey information? - Answers - Electrical Signal
What refers to the maximum voltage that can be reached by a signal? - Answers -
Amplitude
Electricity may flow only when? - Answers - 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? - Answers
- Neutral
The live wire is always ungrounded? - Answers - True. They are very hot caring
electrical power
A ground electrode conductor originates at the neutral or equipment ground bus of the
service panel? - Answers - True
A ground electrode should not be made in contact with the earth? - Answers - False.
sound be on contact with the earth
Compare Watts with Voltage - Answers - 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,. - Answers - 125% / 100%
Conductor sizes are often expressed in? - Answers - American Wire Gage (AWG)
What refers to the allowable current-carrying capacity of a conductor? - Answers -
Ampacity
The insulation type determines the areas the writers can and cannot used? - Answers -
True
RHH wires use rubber insulation that is high heat resistant and is good in? - Answers -
Is only good in dry locations.
, RHW-2 wires use the rubber insulation but are suitable for wet locations? - Answers -
True
What cables can be used inside wall, ceiling or under the floor. - Answers - Non-metallic
(NM)
A _______ is unintentional mess up. - Answers - Ground Fault
An effective Ground-Fault current path is? - Answers - An effective Ground-Fault current
paths a path intentionally constructed to facilitate the operation of the overcurrent
protective devices currently in place.
GFCI is never sensitive to small "leaks" of current - Answers - False. GFCI = ground-
fault circuit interrupter
Grounding and bonding means exactly the same thing? - Answers - False. Bonding is a
means of allowing electrical continuity between metallic objects.
A typical work space (for a working voltage under 600V) should have a minimum
headroom of ______ m. - Answers - 2.0 m
typically there are ____ hot wires running from the utility company into the service
panel. - Answers - 2
A service disconnect need to have a rating which is? - Answers - No less than that the
calculated load or for the type of installation
Fast- blow fuses tend to open real quick when the rated current is reached. - Answers -
True
System grounding is required when you have a supply transformer of a SOV or lower
system? - Answers - System grounding is required when you have a supply transformer
of a 50V or lower system which itself is supplied from a source over 150V to the ground
On a class 1 circuit it is ok to use smaller wire sizes than normal power circuits such as.
- Answers - Anything 16 AWG or lower
Class 1 signaling and remote control circuits are limited too? - Answers - 600 Volts
When a circuit controls equipment can introduce a direct life safety hazard, the circuit
has to be? - Answers - Class 1
Class 2 circuit must be kept separate from lighting? - Answers - True
Generally, cables that are installed in ducts for environment air should be of what type?
- Answers - CL2P or CL3P
AND ANSWERS
Alternating Current (AC) always flows one way then the other? - Answers - True. AC
always flows one way then the other.
The frequency of AC is measured in? - Answers - Measured in hertz Hz
What refers to a voltage can convey information? - Answers - Electrical Signal
What refers to the maximum voltage that can be reached by a signal? - Answers -
Amplitude
Electricity may flow only when? - Answers - 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? - Answers
- Neutral
The live wire is always ungrounded? - Answers - True. They are very hot caring
electrical power
A ground electrode conductor originates at the neutral or equipment ground bus of the
service panel? - Answers - True
A ground electrode should not be made in contact with the earth? - Answers - False.
sound be on contact with the earth
Compare Watts with Voltage - Answers - 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,. - Answers - 125% / 100%
Conductor sizes are often expressed in? - Answers - American Wire Gage (AWG)
What refers to the allowable current-carrying capacity of a conductor? - Answers -
Ampacity
The insulation type determines the areas the writers can and cannot used? - Answers -
True
RHH wires use rubber insulation that is high heat resistant and is good in? - Answers -
Is only good in dry locations.
, RHW-2 wires use the rubber insulation but are suitable for wet locations? - Answers -
True
What cables can be used inside wall, ceiling or under the floor. - Answers - Non-metallic
(NM)
A _______ is unintentional mess up. - Answers - Ground Fault
An effective Ground-Fault current path is? - Answers - An effective Ground-Fault current
paths a path intentionally constructed to facilitate the operation of the overcurrent
protective devices currently in place.
GFCI is never sensitive to small "leaks" of current - Answers - False. GFCI = ground-
fault circuit interrupter
Grounding and bonding means exactly the same thing? - Answers - False. Bonding is a
means of allowing electrical continuity between metallic objects.
A typical work space (for a working voltage under 600V) should have a minimum
headroom of ______ m. - Answers - 2.0 m
typically there are ____ hot wires running from the utility company into the service
panel. - Answers - 2
A service disconnect need to have a rating which is? - Answers - No less than that the
calculated load or for the type of installation
Fast- blow fuses tend to open real quick when the rated current is reached. - Answers -
True
System grounding is required when you have a supply transformer of a SOV or lower
system? - Answers - System grounding is required when you have a supply transformer
of a 50V or lower system which itself is supplied from a source over 150V to the ground
On a class 1 circuit it is ok to use smaller wire sizes than normal power circuits such as.
- Answers - Anything 16 AWG or lower
Class 1 signaling and remote control circuits are limited too? - Answers - 600 Volts
When a circuit controls equipment can introduce a direct life safety hazard, the circuit
has to be? - Answers - Class 1
Class 2 circuit must be kept separate from lighting? - Answers - True
Generally, cables that are installed in ducts for environment air should be of what type?
- Answers - CL2P or CL3P
