Power System Planning and Design (2180903) MCQs

MCQs of Transmission Line Design

Showing 51 to 60 out of 85 Questions
3 4 5 6 7 8
51.
Horizontal spacing between phase conductors of 132 kV line is
(a) 8 m
(b) 10 m
(c) 16 m
(d) 20 m
Answer:

Option (a)

52.
what type of insulator is used on 132 kV transmission lines?
(a) Pin type
(b) Disc type
(c) Shackle type
(d) Any of above
Answer:

Option (b)

53.
Strain type insulators are used
(a) At dead ends
(b) At any intermediate tower
(c) On straight runs
(d) Both (a) and (b)
Answer:

Option (d)

54.
Wavy structure of pin insulator
(a) Increases mechanical strength
(b) Increases puncture strength
(c) Increases flash over voltage
(d) Increases thermal strength
Answer:

Option (c)

55.
Number of discs in a string of insulators for 400 kV over head transmission line lies in the range of
(a) 9 – 10
(b) 15 – 16
(c) 22 – 23
(d) 32 – 33
Answer:

Option (c)

56.
Pin type insulators can be used upto
(a) 22 kV
(b) 33 kV
(c) 66 kV
(d) 110 kV
Answer:

Option (b)

57.
Safety factor of an insulator is defined as
(a) Puncture strength / Flash over voltage
(b) Flash over voltage / Puncture strength
(c) Puncture strength * Flash over voltage
(d) None of above
Answer:

Option (a)

58.
Safety factor of pin type of insulators are usually
(a) 1
(b) 2
(c) 5
(d) 10
Answer:

Option (a)

59.
Voltage rating of a multiple shell pin type insulator cannot be increased beyond a limiting value because
(a) Disruptive critical voltage of the insulator material has reached
(b) Internal voltage distribution between shells becomes unequal
(c) Leakage path resistance reduces
(d) Puncture critical voltage of the insulator material has reached
Answer:

Option (b)

60.
Strain type insulators are arranged
(a) Vertically
(b) Horizontally
(c) Aline with the surface
(d) All of above
Answer:

Option (a)

Showing 51 to 60 out of 85 Questions
3 4 5 6 7 8