Electrical Installation, Estimation & Costing Test Questions - Set 6

1)   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
Answer  Explanation 

ANSWER: Distance more than 25 m

Explanation:
No explanation is available for this question!


2)   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
Answer  Explanation 

ANSWER: Costly

Explanation:
No explanation is available for this question!


3)   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
Answer  Explanation 

ANSWER: All of these

Explanation:
No explanation is available for this question!


4)   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
Answer  Explanation 

ANSWER: 60 cm * 60 cm * 6 mm

Explanation:
No explanation is available for this question!


5)   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
Answer  Explanation 

ANSWER: Charcoal 10 kg, salt 10 kg

Explanation:
No explanation is available for this question!


6)   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
Answer  Explanation 

ANSWER: 12.5 MΩ / number of outlet

Explanation:
No explanation is available for this question!


7)   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
Answer  Explanation 

ANSWER: Both (A) & (B)

Explanation:
No explanation is available for this question!


8)   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
Answer  Explanation 

ANSWER: One MΩ

Explanation:
No explanation is available for this question!


9)   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
Answer  Explanation 

ANSWER: All of these

Explanation:
No explanation is available for this question!


10)   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
Answer  Explanation 

ANSWER: 0.0011 A

Explanation:
No explanation is available for this question!