Question 1

In the American Engineers Handbook, the standard temperature of material resistance is .

Accepted Answer

A)  20°C 
B)  30°C 
C)  40°C 
D)  50°C 
A)  20°C 
B)  30°C 
C)  40°C 
D)  50°C A

Question 2

If there are more than conductors in a raceway, the ampacity of the conductors must be derated.

Accepted Answer

A)  two 
B)  three 
C)  four 
D)  six 
A)  two 
B)  three 
C)  four 
D)  six B

Question 3

There are two conductors, a red and a blue installed in metallic conduit. You are using a MEGGER to test for grounds. How should the two leads of the MEGGER should be connected?

Accepted Answer

A)  one to the blue lead and one to the conduit 
B)  one to the red lead and one to the conduit 
C)  one to the blue lead and one to the red lead 
D)  both a and b above 
A)  one to the blue lead and one to the conduit 
B)  one to the red lead and one to the conduit 
C)  one to the blue lead and one to the red lead 
D)  both a and b above D

Question 4

A piece of wire that is one mil in diameter and one foot long is one mil-foot.

Accepted Answer

A) True 
 B)False

Question 5

All insulations perform equally well in dry, damp, and wet locations.

Accepted Answer

A) True 
 B)False

Question 6

Materials that increase their resistance with an increase in temperature have a coefficient of temperature.

Accepted Answer

A)  positive 
B)  negative 
A)  positive 
B)  negative

Question 7

The ampacities listed in the tables are based on a specified ambient temperature. If conductors are to be operated in a different ambient temperature than the temperature specified, a(n) factor must be applied.

Accepted Answer

The answer of The ampacities listed in the tables are...

Question 8

To test wire insulation, a special type of ohmmeter called a(n) is used.

Accepted Answer

A)  MEGGER 
B)  wattmeter 
C)  ammeter 
D)  voltmeter 
A)  MEGGER 
B)  wattmeter 
C)  ammeter 
D)  voltmeter

Question 9

In the National Electrical Code®, the current carrying abilities of conductors are called the .

Accepted Answer

A)  ampacities 
B)  insulations 
C)  inductances 
D)  ambients 
A)  ampacities 
B)  insulations 
C)  inductances 
D)  ambients

Question 10

The longer the conductor, the more it will have.

Accepted Answer

A)  diameter 
B)  resistance 
C)  voltage 
A)  diameter 
B)  resistance 
C)  voltage

Question 11

The was standardized in 1857 and is used mainly in the United States for the diameters of round, solid, nonferrous electrical wire.

Accepted Answer

AWG
Americ

Question 12

The unit circular mil is equal to the .

Accepted Answer

A)  radius of the wire in mils 
B)  diameter of the wire in mils 
C)  radius of the wire in mils squared 
D)  diameter of the wire in mils squared 
A)  radius of the wire in mils 
B)  diameter of the wire in mils 
C)  radius of the wire in mils squared 
D)  diameter of the wire in mils squared

Question 13

There are six current-carrying conductors in a raceway that is to be installed in an area with an ambient temperature of 90°F. It is necessary to .

Accepted Answer

A)  apply a correction for the ambient temperature only 
B)  derate because of the number of conductors in the raceway only 
C)  correct for temperature and derate (because of the number of conductors) 
D)  no corrections or derates are required 
A)  apply a correction for the ambient temperature only 
B)  derate because of the number of conductors in the raceway only 
C)  correct for temperature and derate (because of the number of conductors) 
D)  no corrections or derates are required

Question 14

The ampacities listed in Table 310.15(B)(16) are based on an ambient temperature of .

Accepted Answer

A)  194°F 
B)  30°F 
C)  140°F 
D)  86°F 
A)  194°F 
B)  30°F 
C)  140°F 
D)  86°F

Question 15

What is the nonconductive covering around a wire?

Accepted Answer

A)  insulation 
B)  conductor 
C)  duct bank 
D)  raceway 
A)  insulation 
B)  conductor 
C)  duct bank 
D)  raceway

Question 16

The ambient air temperature considered in relation to a conductor ampacity is the temperature of the .

Accepted Answer

A)  conductor 
B)  insulation 
C)  raceway 
D)  surrounding air 
A)  conductor 
B)  insulation 
C)  raceway 
D)  surrounding air

Question 17

When a conductor is very large it may become necessary to connect them in .

Accepted Answer

A)  parallel 
B)  series 
A)  parallel 
B)  series

Question 18

A wire that has a diameter of 162 mils has an area of circular mils.

Accepted Answer

A)  162 
B)  26,244 
C)  20,162 
D)  509 
A)  162 
B)  26,244 
C)  20,162 
D)  509

Question 19

The National Electrical Code® contains tables dealing with conductors for general wiring.

Accepted Answer

A)  300 
B)  310 
C)  100 
D)  110 
A)  300 
B)  310 
C)  100 
D)  110

Question 20

There are two conductors, a red and a blue installed in metallic conduit. You are using a MEGGER to test for shorts. How should the two leads of the MEGGER should be connected?

Accepted Answer

A)  one to the blue lead and one to the conduit 
B)  one to the red lead and one to the conduit 
C)  one to the blue lead and one to the red lead 
D)  both to the conduit 
A)  one to the blue lead and one to the conduit 
B)  one to the red lead and one to the conduit 
C)  one to the blue lead and one to the red lead 
D)  both to the conduit

Exam 11: Using Wire Tables and Determining Conductor Sizes

In the American Engineers Handbook, the standard temperature of material resistance is .

If there are more than conductors in a raceway, the ampacity of the conductors must be derated.

There are two conductors, a red and a blue installed in metallic conduit. You are using a MEGGER to test for grounds. How should the two leads of the MEGGER should be connected?

A piece of wire that is one mil in diameter and one foot long is one mil-foot.

All insulations perform equally well in dry, damp, and wet locations.

Materials that increase their resistance with an increase in temperature have a coefficient of temperature.

The ampacities listed in the tables are based on a specified ambient temperature. If conductors are to be operated in a different ambient temperature than the temperature specified, a(n) factor must be applied.

To test wire insulation, a special type of ohmmeter called a(n) is used.

In the National Electrical Code®, the current carrying abilities of conductors are called the .

The longer the conductor, the more it will have.

The was standardized in 1857 and is used mainly in the United States for the diameters of round, solid, nonferrous electrical wire.

The unit circular mil is equal to the .

There are six current-carrying conductors in a raceway that is to be installed in an area with an ambient temperature of 90°F. It is necessary to .

The ampacities listed in Table 310.15(B)(16) are based on an ambient temperature of .

What is the nonconductive covering around a wire?

The ambient air temperature considered in relation to a conductor ampacity is the temperature of the .

When a conductor is very large it may become necessary to connect them in .

A wire that has a diameter of 162 mils has an area of circular mils.

The National Electrical Code® contains tables dealing with conductors for general wiring.

There are two conductors, a red and a blue installed in metallic conduit. You are using a MEGGER to test for shorts. How should the two leads of the MEGGER should be connected?

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