Electrical design L3 B

Electrical design L3 B

Vocational training

73 Qs

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Electrical design L3 B

Electrical design L3 B

Assessment

Quiz

Construction

Vocational training

Practice Problem

Hard

Created by

David Kilmartin

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73 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Co-ordination of fuses during fault or overload conditions is known as:

diversity

diverging

discrimination

deviation.

2.

MULTIPLE SELECT QUESTION

30 sec • 1 pt

A circuit-breaker has two modes of operation:

overload due to thermal effect or short circuit due to a magnetic trip

overload due to a magnetic trip or short circuit due to thermal effect

overload due to a chemical reaction or short circuit due to a magnetic trip

overload due to a thermal trip or chemical reaction due to a magnetic trip.

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

An MCB rated at 40 A will trip:

only when a short circuit occurs

only when an overload occurs

when an overload, short circuit or earth fault occurs

when 41 A flows through it.

4.

MULTIPLE SELECT QUESTION

30 sec • 1 pt

An RCD rated at 30 mA will trip:

when enough current flows to earth

through an earth fault or an overload

through an overload, short circuit or earth fault

when 30 mA flows.

5.

MULTIPLE SELECT QUESTION

30 sec • 1 pt

What type of MCB is associated with commercial applications especially fluorescent lighting?

Type 3

Type B

Type C

Type D

6.

MULTIPLE SELECT QUESTION

30 sec • 1 pt

Which device will detect an imbalance between line and neutral, overloads and all types of overcurrent faults?

RCD

RCBO

MCB

SPD

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

An RCD protects:

the person

the switch

the cable

the load.

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