1) Which IE rule is applicable to service mains?
a. Rule 30
b. Rule 33
c. Rule 77
d. Both (a) & (b)
e. All of these
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Answer
Explanation
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ANSWER: All of these
Explanation:
No explanation is available for this question!
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2) What should be the value of earthing resistance for large power stations?
a. 1 Ω
b. 0.5 Ω
c. 2 Ω
d. 5 Ω
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Answer
Explanation
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ANSWER: 0.5 Ω
Explanation:
No explanation is available for this question!
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3) What is the specification of GI earth plate?
a. 60 cm * 60 cm * 3 mm
b. 60 cm * 60 cm * 6 mm
c. 60 cm * 60 cm * 4 mm
d. 60 cm * 60 cm * 5 mm
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Answer
Explanation
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ANSWER: 60 cm * 60 cm * 6 mm
Explanation:
No explanation is available for this question!
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4) What is the amount of charcoal and salt needed for GI Pipe earthing?
a. Charcoal 5 kg, salt 8 kg
b. Charcoal 10 kg, salt 8 kg
c. Charcoal 10 kg, salt 10 kg
d. Charcoal 5 kg, salt 5 kg
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Answer
Explanation
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ANSWER: Charcoal 10 kg, salt 10 kg
Explanation:
No explanation is available for this question!
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5) Which among these is a demerit of underground service mains?
a. Ugly appearance
b. Frequent fault occurrence
c. Costly
d. All of these
e. None of these
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Answer
Explanation
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ANSWER: Costly
Explanation:
No explanation is available for this question!
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6) For what range is the underground service lines used?
a. Distance more than 25 m
b. Distance more than 100 m
c. Distance less than 1 km
d. Distance more than 1 km
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Answer
Explanation
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ANSWER: Distance more than 25 m
Explanation:
No explanation is available for this question!
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7) What is the diameter of the GI pipe through which the earth wire needs to be taken out?
a. 13 mm diameter
b. 15 mm diameter
c. 19 mm diameter
d. 6 mm diameter
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Answer
Explanation
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ANSWER: 13 mm diameter
Explanation:
No explanation is available for this question!
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8) What type of earthing is used by transmission lines?
a. Plate earthing
b. Rod earthing
c. Strip earthing
d. Both (a) & (c)
e. All of these
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Answer
Explanation
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ANSWER: Strip earthing
Explanation:
No explanation is available for this question!
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9) What is the dimension of the copper strips used for the strip earthing?
a. 25 mm * 4 mm
b. 25 mm * 3 mm
c. 30 mm * 4 mm
d. 30 mm * 3 mm
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Answer
Explanation
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ANSWER: 25 mm * 4 mm
Explanation:
No explanation is available for this question!
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10) Which type of earthing is also called as ‘fire earthing’?
a. Plate earthing
b. Rod earthing
c. Strip earthing
d. All of these
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Answer
Explanation
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ANSWER: Rod earthing
Explanation:
No explanation is available for this question!
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