Deck 9: Conductor Types and Sizes

Question 1

For pure metals such as silver, copper and aluminum, the resistance of a conductor ____ as the temperature increases.

A) increases
B) decreases
C) remains unchanged
D) changes only slightly

Answer 1

A

Question 2

Flexible cords and cables are sufficient for the fixed wiring of a building.

Answer 2

False

Question 3

Line loss is power dissipated as heat.

Answer 3

True

Question 4

For which temperature is resistivity (K) defined?

A) 32 degrees F
B) 68 degrees F
C) 86 degrees F
D) 100 degrees F

Question 5

What unit is used to measure rectangular conductors?

A) circular mil
B) square mil
C) AWG
D) area mil

Question 6

Which is the smallest AWG wire size?

A) No. 0
B) No. 4
C) No. 26
D) No. 50

Question 7

The resistance of a wire is inversely proportional to its length.

Question 8

A feeder circuit consists of the conductors between the service equipment and the final branch-circuit overcurrent device.

Question 9

The ____ of a conductor is limited by the temperature that its insulation can tolerate without deteriorating or losing its insulating quality.

A) capacitance
B) ampacity
C) resistivity
D) thermal constant

Question 10

A correction factor is used for the ampacity of conductors in installations where the operating temperature is above ____ degrees Fahrenheit.

A) 32
B) 68
C) 86
D) 100

Question 11

To convert circular mils to circular millimeters, divide circular mils by ____.

A) 10
B) 25.4
C) 1550
D) 2550

Question 12

What is the most common insulating material used on conductors?

A) copper
B) silk
C) aluminum
D) plastic

Question 13

The amount of heat generated by current flowing through a conductor depends on the current value and the conductor's ____.

A) length
B) area
C) resistance
D) inductance

Question 14

When using a knife to remove insulation from a conductor, the insulation should be cut at a right angle to the conductor.

Question 15

____ is the voltage drop caused by current flowing though the resistance of the wires.

A) Power drop
B) Wire drop
C) Line loss
D) Line drop