EAL unit 4 revision 3
Authored by Gareth Evans
Professional Development
Professional Development
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15 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
which earthing system is not recommended for petrol stations, caravans and marina pontoons?
TNS
TT
TNC
PME
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the maximum value for Ze, for a TN-C-S system?
0.8
0.35
20
1666
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
which earthing system, due to a high possibility of high Zs values, must have additional protection?
TNS
TT
TNCS
PME
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which earthing system is frequently used in hospitals?
TNS
IT
TNC
PME
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which supply system uses a PEN conductor?
TT
TNS
IT
TNCS
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
the metalwork that does not form part of an electrical installation, but may be electrified under fault conditions, is called:
extraneous conductive parts
basic protection
exposed conductive parts
fault protection
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
which of the following is an extraneous conductive part?
the metal casing on a washing machine
metal switch back plate
metal casing on an electric motor
metal casing on a gas pipe
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