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16. The yearly load duration curve of a power plant is a straight line. The maximum load is 750 MW and the minimum load is 600 Mw. The capacity of the plant is 900 MW. What is the capacity factor and utilization factor?

A. 0.56,0.80

B. 0.83,0.75

C. 0.78, 0.9

D. 0.75, 0.83

Explanation:

17. The conductor of a 10 km long, single phase, two wire line are separated by a distance of 1.5 m. The diameter of each conductor is 1 cm, If the conductors are of copper, the inductance of the circuit is

A. 50.0 mH

B. 45.3 mH

C. 23.8 mH

D. 19.6 mH

Explanation:

18. In a string of suspension insulators, the voltage distribution across the different units of a string could be made uniform by the use of a grading ring, because it

A. forms capacitances with link-pins to carry the charging current from link pins

B. forms capacitances which help to cancel the charging current from link pins

C. increases the capacitances of lower insulator units of cause equal voltage drop

D. decreases the capacitances of upper insulators units to cause equal voltage drop

Explanation:

19. A transmission line conductor having a diameter of 19.5 mm, weight 850 kglkm. The span is 275 m. The wind pressure is 39 kg/m of projected area with ice coating of 13 mm. The ultimate strength of the conductor is'8000 kg. What is the maximum sag, if the factor of safety is 2 and ice weight 910 kg/m3?

A. 4.5 m

B. 6.4 m

C. 7.0 m

D. 5 m

Explanation:

20. An overhead transmission line has a span of 240m between level supports. What is the maximum sag if the conductor weight 727 kg/km and has a breaking strength of 6880 kg? Allow the factor of safety of 2. Neglecting wind and ice loading.

A. 1.52 m

B. 1.6 m

C. 0.75 m

D. 1.25 m

Explanation:

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