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110 Electricity unit 16 review

Authored by Robert Hemmila

Professional Development

Vocational training

Used 3+ times

110   Electricity unit 16 review
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20 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The type, size, and maximum amperage carrying capacity of wire that can be used for a particular application is governed by the ________________.

 

International Code Council

National Electrical Code

Department of Energy

National Council on Electrical Safety

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Voltage that is lost as electrical current travels through a conductor from the power source to the equipment is known as _______________________

Voltage drop

Power factor

Power loss factor

Voltage reactance

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the maximum recommended voltage drop for a branch circuit?

3%

5%

10%

25%

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

In most cases, the conductor size used to supply power to heating and cooling equipment can be taken directly from the NEC wire sizing table without the need of factoring in voltage drop if the wire length remains under ________________.

50 feet

100 feet

500 feet

1,000 feet

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What does it mean if a technician measures 225 volts at an operating condensing unit and 240 volts at the breaker in the panel supplying voltage to the condensing unit circuit?

There is a voltage drop of 15 volts through the conductor

The unit is connected to the wrong voltage

The conductor supplying power to the unit is too large

The circuit breaker connected to the unit is too small

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How much voltage drop will there be through a conductor with a resistance of 0.5 ohms and a current flow of 20 amps?

120 volts

10 volts

20 volts

100 volts

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is a disadvantage of using aluminum conductors?

Aluminum is much more expensive that copper

Aluminum is heavy and not very flexible

Aluminum corrodes easily and the connections may become loose over time

Aluminum is a poor conductor of electricity

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