NEWEST VERSIONS 2024 VERSION A, B AND C
COMPLETE 400 QUESTIONS AND CORRECT DETAILED
ANSWERS (VERIFIED ANSWERS) |ALREADY GRADED A+
Wire bundles are commonly secured using _____. - ANSWER: tie wraps
The NEC requires that all grounding electrodes be _____. - ANSWER: bonded
If it is necessary to oversize a motor to provide a wide speed range, it should not be
increased by more than _____. - ANSWER: 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 _____. - ANSWER: 1 1/4" (32
mm)
The maximum allowable spacing between horizontal wireway supports is _____. -
ANSWER: 10'
If a mercury thermostat seems out of adjustment, the first thing to do is ____. -
ANSWER: check for accurate leveling
A type of anchor that is a good choice when jacking and leveling the fastening
component is a _____. - ANSWER: stud bolt anchor
Which of the following types of cable is suitable for dry locations only? - ANSWER:
Type NM
Wire connectors marked only with the wire size should only be used on _____. -
ANSWER: copper conductors
A conventional thermostat should not be thrown into the regular trash because it
_____. - ANSWER: may contain mercury
Another name for a standoff support is a _____. - ANSWER: Minerallac
A self-contained meter installation refers to ____. - ANSWER: a single meter
enclosure
A type of fastener with a bugle-shaped head is a ____. - ANSWER: drywall screw
Heat-shrink insulators are intented to provide _____. - ANSWER: strain relief and
mechanical protection
, The tubing that carries heat-laden refrigerant gas from the evaporator to the
compressor is known as the _____. - ANSWER: suction line
Which of the following principles states that heat is created in one place and carried
to another by means of air or water? - ANSWER: Heat-transfer principle
A typical metric fastener size is ____. - ANSWER: M8 x 1
A type of conduit body with a 90 degree connector and the cover on the left is a
_____. - ANSWER: Type LL
EMT must be supported every ____. - ANSWER: 10ft
The purpose of the defrost cycle in a heat pump is to ____. - ANSWER: prevent ice
buildup on the outdoor coil
A true statement concerning solid versus stranded conductors is _____. - ANSWER:
the diameters are different
Cable trays mounted in a tunnel are most likely to use ____. - ANSWER: wall
mounting
The best electrical tape to use as a protective overwrap on high-voltage cables is
____. - ANSWER: high-temperature silicone rubber
figure - ANSWER: autotransformer reduced-voltage starter
It is important to do which of the following when conductors are fed into long runs
of conduit? - ANSWER: Make sure the wires are straight and do not cross over each
other.
Which of the following inscriptions on a wire connector indicates that it is designed
for use on both copper and aluminum wire? - ANSWER: AL-CU
NEC Article 386 contains_____. - ANSWER: the installation specifications of surface
metal raceways
Which of the following is true of drain wires in fire alarm and instrumentation cable?
- ANSWER: Only one end is typically grounded.
Derating factors shall only be applied when the number of current-carrying
conductors in a wireway exceeds _____. - ANSWER: 30
Which of these devices can retain a high-voltage charge after power has been
removed? - ANSWER: Capacitors used in motor circuits