Arizona Contractor License CR-67 Prep Exam And Correct Answers.
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Course
HVAC CONTRACTOR
Institution
HVAC CONTRACTOR
Alternating Current (AC) always flows one way then the other? - Answer True. AC always flows one way then the other.
The frequency of AC is measured in? - Answer Measured in hertz Hz
What refers to a voltage can convey information? - Answer Electrical Signal
What refers to the max...
Arizona Contractor License CR-67 Prep
Exam And Correct Answers.
Alternating Current (AC) always flows one way then the other? - Answer True. AC always flows one way
then the other.
The frequency of AC is measured in? - Answer Measured in hertz Hz
What refers to a voltage can convey information? - Answer Electrical Signal
What refers to the maximum voltage that can be reached by a signal? - Answer Amplitude
Electricity may flow only when? - 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? - Answer Neutral
The live wire is always ungrounded? - 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? -
Answer True
A ground electrode should not be made in contact with the earth? - Answer False. sound be on contact
with the earth
Compare Watts with Voltage - 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,. - Answer 125% / 100%
,Conductor sizes are often expressed in? - Answer American Wire Gage (AWG)
What refers to the allowable current-carrying capacity of a conductor? - Answer Ampacity
The insulation type determines the areas the writers can and cannot used? - Answer True
RHH wires use rubber insulation that is high heat resistant and is good in? - Answer Is only good in dry
locations.
RHW-2 wires use the rubber insulation but are suitable for wet locations? - Answer True
What cables can be used inside wall, ceiling or under the floor. - Answer Non-metallic (NM)
What cables are most appropriate for damp areas? - Answer Underground feeder (UF) or Non-metallic
Wet underground (NMWU)
An insulated grounded conductor which is ____ AWG or below should be identified by a continuous
white or gray outer finish. - Answer 6 AWG
What is the amount of voltage measured between any two line conductors of a balanced three-phase
system. - Answer Line voltage
What describes the voltage measured across any one component of a balanced three-phase system. -
Answer Phase Voltage
A _______ is unintentional mess up. - Answer Ground Fault
, An effective Ground-Fault current path is? - Answer 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 - Answer False. GFCI = ground-fault circuit interrupter
Grounding and bonding means exactly the same thing? - Answer 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.
- Answer 2.0 m
typically there are ____ hot wires running from the utility company into the service panel. - Answer 2
A service disconnect need to have a rating which is? - 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. - Answer True
System grounding is required when you have a supply transformer of a SOV or lower system? - 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. - Answer
Anything 16 AWG or lower
Class 1 signaling and remote control circuits are limited too? - Answer 600 Volts
When a circuit controls equipment can introduce a direct life safety hazard, the circuit has to be? -
Answer Class 1
Class 2 circuit must be kept separate from lighting? - Answer True
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