Commercial Electrical Wiring Exam Questions With Verified Answers.
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Course
Electrical Wiring
Institution
Electrical Wiring
Commercial Electrical Wiring Exam
Questions With Verified Answers.
__________is a lightweight tubular raceway without threads on each end. - answerEMT
Conductor fill cannot exceed ______% in underfloor raceways. - answer40
RMC must be securely fastened at a maximum of every ____ feet. - answer1...
Commercial Electrical Wiring Exam
Questions With Verified Answers.
__________is a lightweight tubular raceway without threads on each end. - answer✔EMT
Conductor fill cannot exceed ______% in underfloor raceways. - answer✔40
RMC must be securely fastened at a maximum of every ____ feet. - answer✔10
FMC must be securely fastened _______ inches away from a box, conduit body, or panel. - answer✔12
Most non metallic raceways are made of __________. - answer✔PVC
_______ is an enclosed channel for routing and placing conductors and cables. - answer✔raceway
Conduit nipples have a maximum fill rate of _____% of their cross sectional area. - answer✔60
What is the maximum distance conduit must be supported from a box, panel, or conduit body unless
there is an exception? - answer✔3 ft
A___________ is a raceway and is used between a junction box and a luminaire( fixture) and is flexible
to allow for moving and vibration. - answer✔fixture whip
_______________ conductors are two or more conductors that are electrically connected at each end to
form a single conductor. - answer✔paralleled
The nominal inch-based designation used to identify the size of conduits is called the ______ ________.
- answer✔trade size
A(n)__________bend is a double conduit bend with two equal angles bent in opposite directions that
are used to make a change in elevation in a conduit run. - answer✔offset
FMC is safe for use as a EGC(equipment grounding conductor) - answer✔false
wire ways can be concealed - answer✔false
Conductor fill is the total amount of conductors allowed in a raceway and may have different ranges of
fill depending on the number of conductors and the insulation rating of those conductors. -
answer✔true
Jamming can occur when conductors become twisted and are pulled through a bend in conduit. -
answer✔true
Metal raceways cannot be used as an ECG. - answer✔false
IMC has a thicker conduit wall the RMC - answer✔false
To properly bond sections of cable tray a bonding jumper must be installed. - answer✔true
all bonding jumpers must be insulated - answer✔false
A _______ is a metal component that contacts earth and has a conductor connected to it. -
answer✔grounding electrode
When installing service disconnects, they must be grouped together with no more than ____ in one
location. - answer✔6
Mechanical grounding connectors are typically made of high-______ alloy. - answer✔copper
A(n)___________is an electrical conductor used to connect non current carrying metal parts of
equipment or enclosures to the system grounded conductor or grounding electrode conductor.
You Answered - answer✔equipment grounding conductor
A(n)_________is the winding of a transformer that gets power from the source. - answer✔primary
winding
____________ are designed to raise, lower, or isolate voltage in electrical distribution systems. -
answer✔transformers
A battery system that is used for standby and emergency power is called a__________. - answer✔UPS
A_______________ is a service conductor that is installed underground from a transformer to a
building. - answer✔service lateral
In addition to the equipment grounding , _______and _______are also used to protect against ground
faults. - answer✔fuses , circuit breakers
Examples of separately derived systems include, _____, solar voltaic systems, generators, and
transformers. - answer✔batteries
_____________ transformers isolate the power circuit of a control circuit , providing additional safety to
the circuit operator. - answer✔control
_____________ transformers isolate the power circuit of a control circuit , providing additional safety to
the circuit operator. - answer✔90,110
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