Model Questions for SSC Junior Engineer EXAM - Electrical Engg set-7

1. Which type of earthing is also called as 'fire earthing'?

(a) Plate earthing
(b) Rod earthing
(c) Strip earthing
(d) All of these

2. 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

3. The leakage current must not be more than ____________ of maximum supply current

(a) 1 / 1000
(b) 1 / 100
(c) 1 / 5000
(d) 1 / 500

4. 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

5. ______ 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

Study Kit for SSC Junior Engineer EXAM (Paper-1) 2017-2018

6. What should be the value of earthing resistance for large power stations?

(a) 1 ?
(b) 0.5 ?
(c) 2 ?
(d) 5 ?

7. Branch circuit must not feed more than __________ points.

(a) 12
(b) 5
(c) 10
(d) 8

8. 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

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

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

Study Kit for SSC Junior Engineer EXAM (Paper-1) 2017-2018

Answer

1. (b) 2. (c) 3. (c) 4. (a) 5. (a) 6. (b) 7. (c) 8. (b) 9. (a) 10. (b)