Free Printable E.Systems Chap. 5(pg160-166)

1.

Section 250.62 covers grounding electrode conductors that are .

a)

Bare

b)

Copper

c)

Aluminum

d)

Copper-Clad Aluminum

e)

All of the above.

2.

Bare conductors are permitted to be used as .

a)

Ungrounded Conductors

b)

Solid or stranded conductors

c)

Grounded Conductors

d)

Equipment Grounding Conductors

e)

All of the above.

3.

The heart of all electrical systems is the......

a)

Electrical Devices

b)

Voltage,Current,& Resistance

c)

Utilization Equipment

d)

Conductors

e)

All of the above.

4.

One of the most significant factors to consider when designing an Electrical system the associated with the flow of current in a .

a)

Current/Voltage

b)

Resistance/watts

c)

Heat/Conductor

d)

Magnet/Field

5.

The three types of conductors used are , , and .

(a)

6.

What article covers the conductor(s) rating up to 2,000V?

a)

Article 250

b)

Article 310

c)

Article 100

d)

Article 210

7.

Which insulation type can me used in wet locations?

a)

RHW-2

b)

XHWN

c)

THW

d)

XHHW

e)

ALL of the above.

8.

The two most common types of materials used for electrical conductors

are , and

(a)

9.

Insulation Types with in their pre-fix are listed for wet locations

a)

X

b)

W

c)

T

d)

Z

10.

Copper is preferred for its higher allowable .

a)

Ampacity

b)

Resistance

c)

Voltage

d)

Cost

11.

Common building wire conductor properties can be found in

a)

Section 310

b)

Article 250

c)

Chapter 9, table 8

d)

NEC

12.

Aluminum, while it has low conductivity, is very high in

a)

Cost Savings

b)

Weight

c)

Resistance

d)

Ampacity

e)

All of the above

13.

One problem with Aluminum conductors is that is can easily

a)

Blow up

b)

Melt

c)

Oxidize

d)

Lose Power

14.

The three factors that determine Insulation Degradation are , , and

(a)

15.

Copper Clad Aluminum has a minimum copper percentage of %.

a)

25

b)

15

c)

5

d)

10

16.

Copper conductors are available as .

a)

Hard-Drawn

b)

Medium-Hard-Drawn

c)

Soft-Drawn

d)

All of the above.

17.

is a twisting or turning force, measured in lb-ft/ft-lb

a)

Voltage

b)

Torque

c)

Ampacity

d)

Resistance

18.

When installing copper conductors,it is important to consider the of the conductors

a)

Lenght

b)

Shape

c)

Weight

d)

Color

19.

Define NEC

(a)

20.

Electrical Conductors are either ,and .

a)

Wet/Dry

b)

Flat/Circular

c)

Light/Heavy

d)

Solid/Stranded

E.Systems Chap. 5(pg160-166)

Total questions: 20

Worksheet time: 12mins

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