NCCER Electrical Lv 1 MODULE 9 Conductors
and Cables- Questions & Answers
The slandered system of wire sizes in the United Stated is known as the _______. Correct
Ans-American Wire Gauge (AWG) system
Wire sizes of No._ or larger are shown only as stranded. Correct Ans-No.6
The purpose of stranding is to increase ________. Correct Ans-The Flexibility of the wire
A circular mil is a circle that has a diameter of ______. Correct Ans-1 mil
A mil is ____. Correct Ans-0.001 inch
Aluminum conductors have a _______. Correct Ans-Higher resistance
The conductivity of aluminum is approximately ______ that of copper. Correct Ans-2/3
The grounding conductor may be _____. Correct Ans-bare, green, or green with a yellow
stripe
Type NM and Type NMC is widely used for ______ Correct Ans-branch circuits and feeders
in residential and commercial systems.
, What is Romex Cable? Correct Ans-Nonmetallic sheathed cable consists of two or more
plastic-insulated conductors and ground wire surrounded by a moisture resistant plastic jacket.
Can be used in wood stud residential buildings and buildings not exceeding three stories (as long
as it is used and protected with wood studs).
If a conductor has a low resistance, it _______. Correct Ans-has a high conductivity
Telephone wiring in a plenum space is likely to use _______. Correct Ans-Teflon insulation
Using NEC Table 402.5, the allowable ampacity of No.14 AWG fixture wire is ___. Correct
Ans-17 amps
The temperature rating of services rating of service-entrance cable when the cable is not marked
otherwise is_____. Correct Ans-75 degrees Cel(167 degrees Fharen)
Which of the following is the most common type of jacket? Correct Ans-Polyethylene
Which of the following is true when pulling conductors? Correct Ans-If a pull is expected to
be difficult, a pull line should be used rather than a fish tape.
Large conductors are likely to require the use of _____. Correct Ans-Electrically driven
power pullers.
and Cables- Questions & Answers
The slandered system of wire sizes in the United Stated is known as the _______. Correct
Ans-American Wire Gauge (AWG) system
Wire sizes of No._ or larger are shown only as stranded. Correct Ans-No.6
The purpose of stranding is to increase ________. Correct Ans-The Flexibility of the wire
A circular mil is a circle that has a diameter of ______. Correct Ans-1 mil
A mil is ____. Correct Ans-0.001 inch
Aluminum conductors have a _______. Correct Ans-Higher resistance
The conductivity of aluminum is approximately ______ that of copper. Correct Ans-2/3
The grounding conductor may be _____. Correct Ans-bare, green, or green with a yellow
stripe
Type NM and Type NMC is widely used for ______ Correct Ans-branch circuits and feeders
in residential and commercial systems.
, What is Romex Cable? Correct Ans-Nonmetallic sheathed cable consists of two or more
plastic-insulated conductors and ground wire surrounded by a moisture resistant plastic jacket.
Can be used in wood stud residential buildings and buildings not exceeding three stories (as long
as it is used and protected with wood studs).
If a conductor has a low resistance, it _______. Correct Ans-has a high conductivity
Telephone wiring in a plenum space is likely to use _______. Correct Ans-Teflon insulation
Using NEC Table 402.5, the allowable ampacity of No.14 AWG fixture wire is ___. Correct
Ans-17 amps
The temperature rating of services rating of service-entrance cable when the cable is not marked
otherwise is_____. Correct Ans-75 degrees Cel(167 degrees Fharen)
Which of the following is the most common type of jacket? Correct Ans-Polyethylene
Which of the following is true when pulling conductors? Correct Ans-If a pull is expected to
be difficult, a pull line should be used rather than a fish tape.
Large conductors are likely to require the use of _____. Correct Ans-Electrically driven
power pullers.
