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WorksheetsQuiz 4 Earthing and Lightning Protection
Total questions: 10
Worksheet time: 3mins
Name
Class
Date
1.
Combination of bonding and automatic disconnection to protect against indirect contact is also known as
a)
LV protection system
b)
HV protection system
c)
Earthing System.
d)
Consumer system.
2.
Supply authority and consumer installation have a separate earth electrode. This arrangement is known as
a)
TNC
b)
TNS
c)
TNCS
d)
TT
3.
RCCB trip when earth fault was detected. What conditions that trip single phase RCCB?
a)
Phase and neutral current not equal and above settings
b)
Phase and earth current not equal and above settings
c)
Phase and neutral current not equal and below settings
d)
Phase and earth current not equal and below settings
4.
In earthing system testing, this device operates at 50 V DC. This tester is…
a)
RCD tester
b)
Earth loop tester
c)
Earth electrode tester
d)
Low resistance ohmmeter.
5.
All exposed conductive parts is connected to earth bar via a …
a)
CPC
b)
Earth wire
c)
Main bonding cable
d)
Supplementary bonding wire
6.
Which of these is NOT a component of surge protector?
a)
CPC
b)
Zinc oxide varistor
c)
Gas filled spark gap
d)
Suppressor diode
7.
These are the factors that effects the performance of earthing system EXCEPT…
a)
Earth Terminals
b)
Earth Impedance
c)
Earth System configuration
d)
Earth arrangements and connections
8.
Which components is part of Lightning Protection?
a)
CPC
b)
Down conductor
c)
Supplementary bonding
d)
Metal conduit
9.
What test is conducted to check the effectiveness of bonding system which prevents a backward lightning current flow to the equipment?
a)
Earth pulse test
b)
Earth fault loop impedance test
c)
Earth resistance test
d)
Earth continuity test
10.
Which of these is NOT a components of Earthing system?
a)
CPC
b)
Earth bar
c)
Down conductor
d)
Supplementary bonding
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