Arizona Contractor License CR-67
Questions with correct detailed verified
Answers latest update 2025
A service disconnect need to have a rating which is? --- correct
answer ---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. --- correct answer ---True
System grounding is required when you have a supply transformer of
a SOV or lower system? --- correct answer ---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. --- correct answer ---Anything 16 AWG or
lower
Class 1 signaling and remote control circuits are limited too? ---
correct answer ---600 Volts
,When a circuit controls equipment can introduce a direct life safety
hazard, the circuit has to be? --- correct answer ---Class 1
Class 2 circuit must be kept separate from lighting? --- correct answer
---True
Generally, cables that are installed in ducts for environment air
should be of what type? --- correct answer ---CL2P or CL3P
Cables installed in building locations other than in plenums for
environmental air may be? --- correct answer ---CL2 or CL3
Voltage drop can be calculated based on? --- correct answer ---Voltage
drop = (2) x (the circuit length in ft) x (resistance per 1 ft) x (current)
Class 2 circuits. --- correct answer ---Class 2 circuits may not be
derived from a large transformer by using fuses.
The pulling tension in pounds for a copper wire should not exceed
how many times the circular mil area of a conductor? --- correct
answer ---.008 mil
, The breaking capacity specifies. --- correct answer ---maximum
current the fuse can handle
_____ occurs when there are two points in the circuit accidentally
coming in contact. --- correct answer ---Short circuit
Circuits of 30A may be used to serve fixed lighting units with heavy-
duty Iampholders in non-dwellings units. --- correct answer ---True
Circuits of 40A may be used to serve fixed lighting with heavy-duty
Iampholders in fixed cooking appliances. --- correct answer ---True
You need to have at least how many wall switch- controlled lighting
outlets installed in every habitable room? --- correct answer ---Need
at least 1
A lighting system that has an isolating power supply operating at no
more than _____ volts peak under any load condition is considered as
low voltage --- correct answer ---30 Volts
Questions with correct detailed verified
Answers latest update 2025
A service disconnect need to have a rating which is? --- correct
answer ---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. --- correct answer ---True
System grounding is required when you have a supply transformer of
a SOV or lower system? --- correct answer ---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. --- correct answer ---Anything 16 AWG or
lower
Class 1 signaling and remote control circuits are limited too? ---
correct answer ---600 Volts
,When a circuit controls equipment can introduce a direct life safety
hazard, the circuit has to be? --- correct answer ---Class 1
Class 2 circuit must be kept separate from lighting? --- correct answer
---True
Generally, cables that are installed in ducts for environment air
should be of what type? --- correct answer ---CL2P or CL3P
Cables installed in building locations other than in plenums for
environmental air may be? --- correct answer ---CL2 or CL3
Voltage drop can be calculated based on? --- correct answer ---Voltage
drop = (2) x (the circuit length in ft) x (resistance per 1 ft) x (current)
Class 2 circuits. --- correct answer ---Class 2 circuits may not be
derived from a large transformer by using fuses.
The pulling tension in pounds for a copper wire should not exceed
how many times the circular mil area of a conductor? --- correct
answer ---.008 mil
, The breaking capacity specifies. --- correct answer ---maximum
current the fuse can handle
_____ occurs when there are two points in the circuit accidentally
coming in contact. --- correct answer ---Short circuit
Circuits of 30A may be used to serve fixed lighting units with heavy-
duty Iampholders in non-dwellings units. --- correct answer ---True
Circuits of 40A may be used to serve fixed lighting with heavy-duty
Iampholders in fixed cooking appliances. --- correct answer ---True
You need to have at least how many wall switch- controlled lighting
outlets installed in every habitable room? --- correct answer ---Need
at least 1
A lighting system that has an isolating power supply operating at no
more than _____ volts peak under any load condition is considered as
low voltage --- correct answer ---30 Volts
