MCQ-Set-4 Power systems

Electrical engineering

MCQ related to  Power Systems and Design

Set : 4

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

A) 11kkV
B) 33kV
C) 66kV
D) 132kV

... Answer is B)
33kV

32. Whch is not a tyupe of insulators ?

A) Suspension type
B) Strain type
C) Shackle type
D) Simulating type

... Answer is D)
simmulating type

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

A) Pin type insulators
B) Suspension type insulators
C) Strain type
D) Shackle type insulator

... Answer is B)
Suspension type insulators

34. At the sharp turn which insulator is used ?

A) Suspension type insulators
B) Shackle type insulator
C) Strain type
D) Pin type

... Answer is c)
Strain type

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

A) 16
B) 12
C) 18
D) 20

... Answer is A)
16

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

A) Surg impedance
B) Series impedance
C) Shunt impedance
D) Required impedance

... Answer is A)
Surg impedance

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

A) 200 to 400
B) 400 to 600
C) 200 to 600
D) 200 to 300

... Answer is B)
400 to 600 ohms

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

A) 400 to 600
B) 200 to 400
C) 20 to 40
D) 40 to 60

... 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 ......

A) 1
B) 0
C) 0.23
D) 0.75

... Answer is A)
1

40. For surge impedance which is true

A) √(C/L)
B) (C/L)²
C) √(L/C)
D) (L/C)²

... Answer is C)
√(L/C)

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