bonding and earthing

bonding and earthing

12th Grade

10 Qs

quiz-placeholder

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bonding and earthing

bonding and earthing

Assessment

Quiz

Physics

12th Grade

Hard

Created by

Kieran Raynes

Used 2+ times

FREE Resource

10 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the primary purpose of earthing in electrical installations?

To provide a path for telegraph signals

To limit the duration of touch voltages to prevent electric shock

To reduce the cost of electrical installations

To improve the efficiency of electrical appliances

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What does bonding aim to achieve in an electrical installation?

To separate metallic parts from each other

To reduce the risk of electric shock by equalizing potential

To facilitate the flow of fault current to earth

To increase the magnitude of touch voltage

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which document covers the safety requirements for earthing and bonding?

Health & Safety Executive guidelines

IET Wiring Regulations

BS7671

National Electrical Code

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is a TN-S earthing system?

A system that uses the earth as a conductor

A system with multiple neutral-to-earth connections

A system with a single neutral-to-earth connection near the supply transformer

A system without its own earth connection

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the maximum external earth fault loop impedance for TN-C-S systems?

0.35 Ω

1.0 Ω

0.8 Ω

22 kΩ

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Why might the TN-C-S arrangement be hazardous?

If the PEN conductor becomes an open circuit

If it is used in rural areas

If multiple users utilize one supply cable

If it is used in petrol stations

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is required for a TT system?

Multiple neutral-to-earth connections

A combined neutral and PEN return path

Consumers must supply their own earth connection

A separate route back to the sub-station transformer

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