Transmission and distribution. part - 1

1. Total connected load and the number of points on a lighting sub-circuit should not exceed.

A. 700 w and 8 points

B. 800 w and 10 points

C. 900 w and 10 points

D. 1000 w and 8 points

2. The loop earth wire used shall not be of size less than

A. 14 SWG

B. 10 SWG

C. 8 SWG

D. 16 SWG

3. Percentage regulation of a transmission line is given by,

A. ×100

B.

C. ×100

D.

4. Which of the following relays is used on long transmission lines?

A. impedance relay

B. reactance relay

C. Mho’s relay

D. IDMT relay

5. Large internal faults are protected by

A. Mear price percentage differential protection

B. Mho’s and ohm relay

C. Horn gaps and temperature relay

D. Earth fault and positive sequence relay

6. Hollow conductors are employed to……….

A. Reduce weight of copper

B. Improve stability

C. Reduce corona

D. Increase power transmission capacity

7. In the power system network auto transformer is preferable for which of the following voltage rating ?

A. 66/11 Kv

B. 132/11 Kv

C. 220/66 Kv

D. 400/220 Kv

8. The parameter which is neglected in the analysis of short transmission line is :

A. Resistance

B. Inductance

C. Capacitance

D. All of these

9. In a three core flexible wire, the color neutral wire is generally,

A. Red

B. Green

C. Black

D. None of these

10. What type of supply is required for a workshop?

A. Three phase, four wire

B. Three phase, three wire

C. Single phase, two wire

D. Six phase, six wire