Exam (elaborations)
NCC PRACTICE TEST 6 QUESTIONS AND ANSWERS
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NCC PRACTICE TEST 6 QUESTIONS AND ANSWERS
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NCC PRACTICE TEST 6 QUESTIONS AND ANSWERSWire bundles are commonly secured using _____. - Answers -tie wraps
The NEC requires that all grounding electrodes be _____. - Answers -bonded
If it is necessary to oversize a motor to provide a wide speed range, it should not be
increased by more than _____. - Answers -1hp
When installing hammer-driven pins and studs in soft concrete block, the drive pin or
stud should be embedded in the concrete for at least _____. - Answers -1 1/4" (32 mm)
The maximum allowable spacing between horizontal wireway supports is _____. -
Answers -10'
If a mercury thermostat seems out of adjustment, the first thing to do is ____. - Answers
-check for accurate leveling
A type of anchor that is a good choice when jacking and leveling the fastening
component is a _____. - Answers -stud bolt anchor
Which of the following types of cable is suitable for dry locations only? - Answers -Type
NM
When troubleshooting a motor, the possible cause for constant chatter is _____. -
Answers -a broken pole shader
A type of conduit that has a wall thickness less than that of RMC but thicker than EMT is
_____, - Answers -IMC
One characteristic of aluminum conduit is that it ____. - Answers -is more resistant to
wet environments
When used in control cable, which of the following must be grounded in order to be
effective? - Answers -Drain wires
The requirements for grounding and bonding electric services can be found in _____. -
Answers -NEC Article 250
To position cable so that it is not under tension, it is necessary to _____. - Answers -
train conductors
When making a conduit-to-box connection and a bonding cire will be installed, use a
_____ - Answers -grounding locknut
, Select the list of conductors that begin with the smallest wire and go up. - Answers -18
AWG, 14 AWG, 1/0, 3/0
Automatic changeover thermostats have a minimum interlock setting, also known as the
____. - Answers -deadband
To determine the correct connector size for MC cable, ______ - Answers -refer to the
manufacturer's literature
To properly install heat-shrink insulators, _____. - Answers -Slip the insulator over the
connector and apply heat for a few seconds
When the refrigeration compressors are driven by conventional , nonhermetic, motors,
the motors and controls are subject to the requirements in _____. - Answers -NEC
Article 430
When installing conduit in reinforced concrete, it is best to use a ____. - Answers -
concrete box with ears
Conduit is best stored _____. - Answers -in pipe racks.
In a typical DC electric braking circuit, power is supplied to the braking relay by a -
Answers -NOTO contact
For the AFD operating frequency range shown in the figure above, the range of output
frequencies over which the AFD output voltage remains constant while the frequency
varies is identified in the figure as - Answers -the straight horizontal line, B to C
For the AFD operating frequency range shown in the figure above, the range of AFD
output frequencies over which the ratio of volts to hertz remains constant is identified in
the figure above as - Answers -the diagonal, dashed line, A to B
Equipment consisting of busbars mounted inside an enclosure that provides a means of
tapping the service-entrance conductors is called a - Answers -busway
Connecting a 120V heating cable to a 240V circuit will - Answers -melt the cable
The conductor or busbar with a higher voltage to ground in a delta-connected four-wire
system is also known as the - Answers -high leg
A device that uses dissimilar metals to control electron flow is known as a - Answers -
thermocouple
When installing multi-family services, the service disconnect - Answers -may be placed
indoors under specific circumstances
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