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tex-eng, Engineer
Category: General
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Experience:  Engineer, very good math skills, problem solver and researcher
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Resolved Question:

1. If a cable insulation is described as RHW, you would be able to use the cable for what maximum
A. 86?F C. 167?F
B. 140?F D. 194?F
2. Ampacity, or the maximum flow of electricity for a time period,
A. increases as wire number increases. C. decreases as wire number decreases.
B. increases as wire diameter increases. D. isn't dependent on wire diameter or number.
3. The ease with which a material allows electricity to move is called
A. ampacity. C. voltage.
B. potential. D. conductivity
4. The most widely used insulator for splices of smaller wires, like those used for devices, is
A. a wire nut. C. friction tape.
B. solder. D. a split bolt.
5. The ampacity of a No. 12 aluminum wire with RHW insulation installed in a raceway that has 19
other wires is
A. 5 A. C. 10 A.
B. 7 A. D. 15 A.
6. The diameter of a No. 6 wire is larger than a
A. 250 kcmil cable. C. No. 4 wire.
B. No. 12 wire. D. No. 2/0 wire.
7. Which one of the following types of wire can be used with the pressure terminals of a duplex
A. Solid aluminum C. Solid copper
B. Stranded aluminum D. Stranded copper
8. A nonshielded cable with a 1.5-inch diameter should have a minimum bending radius of
A. 1.5 in. C. 12.0 in.
B. 6.0 in. D. 18.0 in.
9. A conductor that's described as a 750 MCM wire has an area of
A. 750 cmils. C. 750 in2.
B. 750 kcmils. D. 750,000 kcmils.
10. What size copper wire should be used for a 125 ft, 15 A branch circuit if a maximum voltage drop of
3.2 V is allowed?
A. No. 14 C. No. 10
B. No. 12 D. No. 8
11. The calculation used to determine amperage of a conductor based on the total number of conductors
in a conduit is called
A. derating. C. conduit fill.
B. voltage drop. D. conductor fill.
12. Ideally, NM or armored cable should be installed in a wall stud at least how far back from the front
edge of the stud?
A. 3
4 in. C. 11
4 in.
B. 1 in. D. 11
2 in.

13. An electric iron is plugged into a receptacle that has 110 V present. If the voltage loss from the panel
to the receptacle is 6 V, the line voltage at the panel is
A. 104 V. C. 116 V.
B. 110 V. D. 120 V.
14. A conductor with a diameter of 100 mils has an area of
A. 0.00785 in2. C. 100 kcmil.
B. 0.01 cmil. D. 100 in2.
15. A single No. 10 copper wire with type THW insulation that's used in free air with an ambient
temperature of 158?F has an approximate ampacity of
A. 16.5 A. C. 36.9 A.
B. 31.9 A. D. 40.0 A.
16. When soldering a lug onto a copper wire, you would use
A. plain solder without flux. C. acid-core solder only.
B. both plain solder and an acid. D. rosin-core solder only.
17. What is the ampacity of a No. 3/0, THHN copper wire, in a conduit with one other conductor?
A. 175 A C. 225 A
B. 200 A D. 350 A
18. Five No. 8 aluminum conductors with THHN insulation are to be routed through a conduit found in a
boiler room with an ambient temperature of 75?C. The ampacity of each conductor is
A. 14.8 A. C. 36.6 A.
B. 17.0 A. D. 48.0 A.
19. A type TW cable containing two No. 12 copper conductors has a maximum overcurrent protection of
A. 15 A. C. 25 A.
B. 20 A. D. 30 A.
20. Which type of tape is used to round sharp edges on splices using larger conductors?
A. Plastic tape C. Cotton tape
B. Rubber tape D. Friction tape
Submitted: 10 years ago.
Category: General
Expert:  tex-eng replied 10 years ago.
HelloCustomer hope you are doing well,

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