
Electrical design L3 B
Quiz
•
Construction
•
Vocational training
•
Practice Problem
•
Hard
David Kilmartin
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73 questions
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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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