1) What will be the maximum leakage current, if a domestic installation uses 20 points of 40 watt lamps and 5 fans of 100 watts each?
Use voltage = 240 V
a. 0.002 A
b. 0.0011 A
c. 0.003 A
d. 0.005 A
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Answer
Explanation
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ANSWER: 0.0011 A
Explanation:
No explanation is available for this question!
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2) Which among these tests are to be conducted on wiring installations?
a. Testing of polarity of non linked single pole switches
b. Testing of earth continuity path
c. Testing of earth resistance
d. All of these
e. None 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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3) If the measured insulation value is more than unity what value should be taken as the maximum working value?
a. 0.75 MΩ
b. One MΩ
c. 0.5 MΩ
d. One ohm
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Answer
Explanation
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ANSWER: One MΩ
Explanation:
No explanation is available for this question!
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4) What is the reason for excess reading of the energy meter?
a. Defective wiring
b. Meter defects
c. Over voltage
d. Both (A) & (B)
e. All of these
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Answer
Explanation
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ANSWER: Both (A) & (B)
Explanation:
No explanation is available for this question!
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5) What should be the insulation resistance in case of PVC wires?
a. 12.5 MΩ / number of outlet
b. 82.5 MΩ / number of outlet
c. 2.5 MΩ / number of outlet
d. 10.5 MΩ / number of outlet
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Answer
Explanation
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ANSWER: 12.5 MΩ / number of outlet
Explanation:
No explanation is available for this question!
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6) At what temperature value is the insulation resistance corrected if it is measured to be different?
a. 30 ° C
b. 25 ° C
c. 22 ° C
d. 15 ° C
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Answer
Explanation
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ANSWER: 25 ° C
Explanation:
No explanation is available for this question!
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7) ______ should be provided as the working space around the main switchboard according to IE rule 51.
a. 0.914 m
b. 0.523 m
c. 0.638 m
d. 0.814 m
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Answer
Explanation
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ANSWER: 0.914 m
Explanation:
No explanation is available for this question!
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8) The leakage current must not be more than ____________ of maximum supply current
a. 1 / 1000
b. 1 / 100
c. 1 / 5000
d. 1 / 500
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Answer
Explanation
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ANSWER: 1 / 5000
Explanation:
No explanation is available for this question!
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9) Branch circuit must not feed more than __________ points.
a. 12
b. 5
c. 10
d. 8
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Answer
Explanation
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ANSWER: 10
Explanation:
No explanation is available for this question!
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10) Which set of rules are to be verified on completion of wiring on any new installation?
a. IE rules, 1950
b. IE rules, 1956
c. IE rules, 1960
d. None of these
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Answer
Explanation
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ANSWER: IE rules, 1956
Explanation:
No explanation is available for this question!
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