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DOMESTIC WIRING PRACTICE
Set 8
Set 8
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Q13861
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What is the resistance value of earth continuity conductor?
A
Higher than 1 ohm to 10 ohm
B
Should not be more than one ohm
C
Greater than 10 ohm to 100 ohm
D
Greater than 100 ohm
Q13862
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Which is the length of pipe electrode used for pipe earthing?
A
Not less than 1 m
B
Not less than 1.5 m
C
Not less than 2.0 m
D
Not less than 2.5 m
Q13863
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What is the thickness of copper plate used for plate earthing?
A
Not less than 2.0 mm
B
Not less than 2.5 mm
C
Not less than 3.15 mm
D
Not less than 6.5 mm
Q13864
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Which method is preferred to reduce the value of earth resistance?
A
By increasing the dia of pipe
B
Connecting number of earth electrode in parallel
C
By increasing the depth of earth pit
D
By connecting insulated cables
Q13865
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Where system earthing is employed?
A
Commercial buildings
B
Industries
C
Generating station
D
Domestic buildings
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