Power Distribution and Earthing Systems

Power Distribution and Earthing Systems

12th Grade

10 Qs

quiz-placeholder

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Power Distribution and Earthing Systems

Power Distribution and Earthing Systems

Assessment

Passage

Other

12th Grade

Practice Problem

Hard

Created by

Ebi P.

Used 10+ times

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10 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the initial voltage of electricity generated at power stations before it is stepped up for transmission?

132,000 volts AC

25,000 volts AC

400 volts AC

11,000 volts AC

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

To what higher voltage is electricity stepped up for transmission on the National Grid network?

400,000 volts AC

11,000 volts AC

230 volts AC

400 volts AC

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Why is electricity transmitted at high voltages?

To increase the current

To increase voltage drop

To reduce the conductor size and cost

To increase the weight of conductors

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the voltage level when electricity is transformed down at local substations for domestic use?

230 volts AC

11,000 volts AC

132,000 volts AC

400,000 volts AC

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What does TNS stand for in UK domestic electrical installations?

Terra Neutral Separate

Terra Neutral System

Terra Neutral Single

Terra Neutral Secure

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the maximum earth fault loop impedance for a TNS system?

1 ohm

200 ohms

0.8 ohms

0.35 ohms

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What does TT system rely on for earth protection?

The physical earth

The outer sheathing of the supply cable

A separate earth conductor

A combined earth and neutral conductor

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