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MCQ_Set-4_Power System Operation & Control

Power system operation and control

Set : 4

31. Pin type insulators are used up to.....kV ?




... Answer is B)
33kV



32. Whch is not a tyupe of insulators ?




... Answer is D)
simmulating type



33. "Only punctured disc has to replaced" is related with......?




... Answer is B)
Suspension type insulators



34. At the sharp turn which insulator is used ?




... Answer is c)
Strain type



35. For 230kV line voltage ...... insuilators used?




... Answer is A)
16



36. Square root of the ratio of line impedance to shunt addmitance is called......




... Answer is A)
Surg impedance



37. The value of surge impedance in over head line varies between....ohms




... Answer is B)
400 to 600 ohms



38. Surge impedance for underground cable is varies between.....ohms




... Answer is D)
40 to 60 ohms



39. if reactive power produced by line is equal to reactivate power supplied by line then the surge impedance is ......




... Answer is A)
1



40. For surge impedance which is true




... Answer is C)
√(L/C)



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