_____ indicate the number of conduction wires in cables or conduit and an arrow symbolizes the circuit connection to the service panel. correct answers Slash marks
Never wear safety goggles or a duct mask when using power trade. correct answers False
An insulator is a material that has very l...
CNST 213 || with 100% Verified Solutions.
_____ indicate the number of conduction wires in cables or conduit and an arrow symbolizes the
circuit connection to the service panel. correct answers Slash marks
Never wear safety goggles or a duct mask when using power trade. correct answers False
An insulator is a material that has very little resistance and permits electrons to move through it
easily. correct answers False
Running nonmetallic cable through stud walls and through floor joists is the most popular way of
routing. correct answers True
The inverse square law states that the amount of illumination on a surface varies inversely with
the square of the distance from the light source. correct answers True
_____ are covered with an insulating material that is available in different colors. correct
answers Conductors
A 120/240V, 3o, 4-wire service is used to supply customers that require large amounts of 3o
power with some 120V and 240V, 1o power. correct answers True
A(n) _____ is an electric device that uses electromagnetism to change (step-up or step-down) AC
voltage from one level to another. correct answers Transformer
A(n) ______ is a material that has very high resistance and resists the flow of electrons. correct
answers insulator
Receptacles boxes are _____-shaped. correct answers square, octagonal, rectangular (all of the
above)
A ____ is an electric overcurrent protection device used to limit the rate of current flow in a
circuit. correct answers fuse
Typical residential wire splices are pigtail, western union, t-tap, and portable cord splices. correct
answers True
A standard plug fuse is a screw-in type electrical safety device that contains a metal conducting
element designed to melt when the current through the fuse exceeds the rated value. correct
answers True
_____ is the appearance of a color when illuminated by a light source correct answers color
rendering
_____ is the process of joining metals by using filter metal and heat to make a strong electrical
and mechanical connection correct answers Soldering
, Conductors have 5 or more valance electrons correct answers False
The major sources of energy are coal, oil, and _____. correct answers gas, wood, nuclear power
(all of the above)
A _____ is an electrical device containing fuses or circuit breakers for protecting the individual
circuits of a residence and serves as a means of disconnecting the entire residence from the
distribution system. correct answers service panel
Polarity is the positive (+) or (-) state of an object. correct answers True
Type ____ cable is a nonmetallic-sheathed cable that has the conductors enclosed within a
corrosion-resistant, nonmetallic jacket. correct answers NMC
Normally, the applied voltage should be within +- 10% of the motor's rated voltage. correct
answers True
The power rating of incandescent lamp bulbs is given in lumens correct answers True
_____ current is a current that flows in only one direction. correct answers Direct
To open the plastic jacket of an NM cable, a knife is used to cut through the center of the jacket
where the ground wire is located correct answers True
Type NM cable may be fished though masonry walls if no moisture is present and the wall is
above grade. correct answers True
Wire nuts are used to connect both conduction wires and ground wires. correct answers True
The infrared region is the region of the spectrum with wavelengths just short of the color violet.
correct answers False
An electrical layout is a drawing that indicates how the ___ of a circuit will be connected to one
another and where the wires will be run. correct answers component parts
A(n) ____ is a half of a cycle. correct answers alternation
Routing cable under a corner is more economical and faster than looping cable over a corner
correct answers False
The 14 in a cable marked 14/2 indicates ___. correct answers The size of the wire
Electrical plans are used to determine the number of openings in walls and ceilings and to
estimate the amount of wire and conduit that is required for the job. correct answers True
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