MCQ_Set-3_Power System Operation and Control

Power system operation and control

Set : 3

21. Dog conductor use for

A) 110kv
B) 66kv
C) 220kv
D) 400kv

... Answer is B)
66 kv .

22. What is current carrying capacity for 'Mossse' conductor at 75°C ?

A) 600 Amp
B) 1000 Amp
C) 300 Amp
D) 800 Amp

... Answer is D)
800 Amp .

23. For air ionizetion minimum electric field intensity is ?

A) 30 kV/cm
B) 11 kV/cm
C) 10 kV/cm
D) 50 kV/cm

... Answer is A)
30 kV/cm .

24. For corona which is not true

A) Hissing noise
B) Violate glow appears
C) Production of ozone gas
D) low voltage

... Answer is D)
Low voltage .

25. due to corona ?

A) Power loss
B) Radio interference
C) Noise produce
D) All f above

... Answer is D)
All of above .

26. Which factor affect the corona ?

A) Atmosphere
B) Conductor size
C) Line voltage
D) All

... Answer is D)
All .

27. At Which voltage corona produce

A) 3 kV/cm
B) 30 kV/cm
C) 300 kV/cm
D) 50 kV/cm

... Answer is B)
30 kV/cm

28. Air break down voltage in rms is ?

A) 30 kV/cm
B) 11 kV/cm
C) 21 kV/cm
D) 50 kV/cm

... Answer is C)
21 kV/cm

29. What is surface factor for stranded conductor ?

A) 0.92
B) 0.94
C) 0.87
D) 0.82

... Answer is D)
0.82

30. which is not a insulators properties?

A) High mechanical strength
B) good dielectric strength
C) high resistivity
D) good conductivity

... Answer is D)2
good conductivity

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