Unit 16 - ELT 604 (Practice CBT)

Unit 16 - ELT 604 (Practice CBT)

University

31 Qs

quiz-placeholder

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Unit 16 - ELT 604 (Practice CBT)

Unit 16 - ELT 604 (Practice CBT)

Assessment

Quiz

Other

University

Medium

Created by

CA Cole

Used 11+ times

FREE Resource

31 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

What is the effect on an installation forming part of an MEN system if the PEN conductor develops a high impedance?

Voltage will appear on earthed metalwork.

Installation neutral conductor will overheat.

Protective devices will operate more quickly under fault conditions.

Voltage will only appear on earthed metalwork if an earth fault occurs.

2.

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

Which parts of an electrical installation are connected by the earthing conductor?

Exposed conductive parts and main earthing terminal.

Main earthing terminal and earth electrode

Two extraneous conductive parts.

No connection needed

3.

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

What is the purpose of equipotential bonding?

To earth an exposed conductive part.

To earth the metal casing of Class I equipment.

To provide a conducting path in the event of an earth fault.

To keep two exposed Conductive parts at or about the same potential.

4.

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

What factor affects the value of earth fault loop impedance of a circuit?

Resistance of the neutral conductor.

Type of cable insulation.

Rating or the circuit protective device.

Length of circuit cable.

5.

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

What is the maximum residual operating current of an RCD that provides protection against contact with live parts?

10 mA

30 mA

100 mA

300 mA

6.

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

Which method may be used to safeguard an installation against overvoltage?

Fit a surge protective device at the main terminals.

Connect the installation to an overhead distribution system.

All appliances rave an impulse withstand voltage of 6 kA.

Installation has a main fuse or circuit breaker which disconnects the maximum fault current.

7.

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

What action must be taken when carrying out a visual inspection of a new electrical installation?

Installation must be totally isolated from the supply.

All testing must be carried out before the inspection starts.

Only the wiring and control equipment is inspected.

All cables are inspected throughout their length.

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