Holt, Electricians Exam Prep, Unit 5 Questions and Answers.
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Holt, Electricians
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Holt, Electricians
Holt, Electricians Exam Prep, Unit 5 Questions and Answers.Holt, Electricians Exam Prep, Unit 5 Questions and Answers.Holt, Electricians Exam Prep, Unit 5 Questions and Answers.Holt, Electricians Exam Prep, Unit 5 Questions and Answers.
Holt, Electricians Exam Prep, Unit 5 Questions and
Answers.
Cable treated as 1 conductor can take up to _____% of the cross sectional area of a
raceway. - Correct answer 53%
One conductor can take upt o _____% of the cross sectional area of a raceway -
Correct answer 53%
Two conductors can take up to _____% of the cross sectional area of a raceway -
Correct answer 53%
Three or more conductors can take up to ____% of the cross-sectional area of a
raceway. - Correct answer 40%
Nipple: One or more conductors can take upt o _____% of the cross sectional area of a
nipple. - Correct answer 60%
When all the conductors are the same size, the number of conductors in a raceway can
be determined by looking at the tables located in ________ - Correct answer Annex C
Annex C does not have a table for liquid tight flexible nonmetallic conduit of the _____
type - Correct answer black
How many no. 14 RHH conductors can be installed in 1 inch electrical metallic tubing? -
Correct answer 16
How many compact No. 6 XHHW conductors can be installed in a 1 ¼ inch nonmetallic
tubing? - Correct answer 10
If 1 ¼ inch flexible metal conduit has three THHN conductors (not compact) what is the
largest conductor permitted to be installed. - Correct answer 1
How many 4/0 RHH conductors (without outer cover) can be installed in 2 inch
intermediate metal conduit? - Correct answer 3
How many No. 18 TFFN conductors can be installed in a ¾ inch liquidtight flexible
metallic conduit? - Correct answer 39
Chapter 9, Table ____ can be used when calculating the cross-sectional area of
insulated conductors - Correct answer 5
Chapter 9, Table ____ can be used when calculating the cross-sectional area of bare
conductors. - Correct answer 8
,When conduit or tubing does not exceed _____ inches in length, it is called a nipple. -
Correct answer 24
The cross sectional areas of conduit and tubing can be found in Table _____ of Chapter
9. - Correct answer 4
What is the total cross-sectional area of 1 ¼ inch rigid metal conduit ? - Correct answer
1.526 inches
What is the cross -sectional area for one No. 12 RHW conductor with outer cover? -
Correct answer .0353 sq. inch
What is the cross-sectional area for one No. 10 RHH without an outer cover? - Correct
answer .0333 sq. inch
What is the cross-sectional area in square inches for one No. 10 bare solid conductor? -
Correct answer .008 sq. inch
What is the alternating current resistance of No. 1/0 copper installed in a metal conduit?
Conductor length 1000 feet. - Correct answer .12 ohm
Raceway and Nipple Calculations: Tables are not useful to determine raceway sizing if
conductors are of different sizes. What are the three steps for determining raceway and
nipple size. - Correct answer Step 1) cross sectional area of each conductor. Step 2)
Cross sectional area for all conductors. Step 3) Size the raceway according to percent
fill.
Raceway Size: A 400 amp feeder is installed in schedule 40 rigid nonmetallic conduit.
This raceway contains three 500 kcmil THHN conductors, one 250 THHN conductor
and one No. 3 THHN conductor. What size raceway is required for these three
conductors? - Correct answer 3 inch
Nipple Size: What size rigid metal nipple is required for three NO. 3/0 THHN
conductors, one No. 1 THHN conductor, and one No. 6 THHN conductor? - Correct
answer 1 ½ inch
Existing Raceway Calculations: What are the three steps to determine raceway cross-
sectional spare space area? - Correct answer Step 1) Determine raceways cross-
sectional area for conduit fill Tables 1 and 4, Chapter 9. Step 2) Determine the area of
the existing conductors. Step 3) Subtract the cross-sectional area of the existing
conductors from the area of permitted conductor fill.
Existing Raceway Calculations, Part 2: What are the two steps to determine the number
of conductors permitted in spare space area? - Correct answer Step 1) Determine the
cross-sectional area of conductors to be added. Step 2) Divide the spare space area by
the conductors cross-sectional area.
, Spare Space Area: An existing one inch liquidtight flexible metal conduit contains two
No. 12 THW conductors, two No. 10 THW conductors, and one No. 12 bare (stranded).
What is the area remaining for additional conductors? - Correct answer .2636 for
conduit and .4386 for a nipple
Conductors in Spare Space Area: An existing 1 inch EMT contains two No. 12 THHN
conductors, two No. 10 THHN conductors, and one No. 12 bare stranded conductors.
How many additional No. 8 THHN conductors can be added to this raceway? - Correct
answer 7 if raceway is more than 24 inches long, 12 if raceway is 24 inches long or
less.
When all conductors are the same size, Table _______ can be used to determine the
number of conductors permitted in the outlet box, or determine the size outlet box
required for the given number of conductors - Correct answer 314-16a
Outlet Box Size: What size outlet box is required for six No. 12 THHN conductors, and
three No. 12 THW conductors? - Correct answer 9
Number of Conductors in an Outlet Box: Using Table 314-16a, how many No. 14 THHN
conductors are permitted in a 4 x 1 ½ round box? - Correct answer 7
Box Fill Requirements: Each conductor that originates outside the box and terminates or
is spliced within the box is considered as ____ conductor. - Correct answer 1
Box Fill Requirements: Each conductor that runs through the box is considered as
_____ conductor. - Correct answer 1
Box Fill Requirements: Fixture wires smaller than NO. 14 from a domed fixture or similar
canopy are considered as ______ conductor - Correct answer 0
Box Fill Requirements: One or more internal cable clamps are considered as _____
conductors based on the ____ conductor that enters the box - Correct answer 1, largest
Box Fill Requirements: One or more fixture studs or hickeys within the box are
considered as ____ conductors based on the _____ conductor that enters the box. -
Correct answer 1, largest
Box Fill Requirements: Each yoke or strap containing one or more devices or equipment
is considered as ____ conductors, based on the ______ conductor that terminates on
the yoke. - Correct answer 2, largest
Box Fill Requirements: One or more grounding conductors are considered ____
conductor based on the ____ grounding conductor that enters the box. - Correct answer
1, largest
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