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Wireman
INDUSTRIAL WIRING PRACTICE
Set 3
Set 3
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Q14073
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Which rated voltage megger is used to measure the insulation resistance value of 3phase 415V induction motor?
A
250V
B
500V
C
1000V
D
2500V
Q14074
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Which instrument is used to measure the insulation resistance?
A
Shunt type ohmmeter
B
Series type ohmmeter
C
Megger
D
Multimeter
Q14075
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What is the main reason for leakage current flowing in wring installation?
A
Insulation failure
B
Low earth resistance
C
Incorrect size of earth wire
D
High earth reactance
Q14076
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How many earth continuity conductors should be provided from the machine to panel board and to the main earth electrode?
A
4
B
3
C
2
D
1
Q14077
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Which size of GI conductor is used for earthing to the motor from the main electrode?
A
14 SWG
B
10 SWG
C
8 SWG
D
4 SWG
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