Power System Planning and Design (2180903) MCQs

MCQs of Transmission Line Design

Showing 41 to 50 out of 85 Questions
2 3 4 5 6 7
41.
Shape that is attained by the conductors if suspended from the same height is
(a) Parabola
(b) Catenary
(c) Semi circle
(d) None of above
Answer:

Option (b)

42.
Conductor sag should be
(a) Zero
(b) Minimum
(c) Maximum
(d) Of any value
Answer:

Option (b)

43.
The value of minimum safety factor for conductor tension is
(a) 1
(b) 1.5
(c) 2
(d) 3
Answer:

Option (c)

44.
The maximum tension in a section of overhead line conductor between two supports of unequal height occurs at
(a) Lower support
(b) Higher support
(c) Midpoint of the conductors
(d) None of above
Answer:

Option (b)

45.
Safety factor is the ratio of
(a) 1 / Working stress
(b) 1 / Breaking stress
(c) Working stress to breaking stress
(d) Breaking stress to working stress
Answer:

Option (d)

46.
What is the effect of temperature rise on the over head lines?
(a) Increase the sag and decrease the tension
(b) Increase the sag and tension
(c) Decrease the sag and increase the tension
(d) Decrease the sag and tension
Answer:

Option (a)

47.
Minimum clearance of high voltage transmission lines from ground across the streets is
(a) 3 m
(b) 5 m
(c) 6 m
(d) 8 m
Answer:

Option (c)

48.
Minimum horizontal clearance of a low voltage line from a residential building is
(a) 0.5 m
(b) 1.0 m
(c) 1.2 m
(d) 1.6 m
Answer:

Option (c)

49.
If a 132 kV line is passing over a residential building, the minimum vertical clearance from the roof of the building is
(a) 3.15 m
(b) 4.57 m
(c) 6.38 m
(d) 9.27 m
Answer:

Option (b)

50.
Minimum clearance for the 132 kV line from the ground is
(a) 3.2 m
(b) 6.4 m
(c) 7.5 m
(d) 10.5 m
Answer:

Option (b)

Showing 41 to 50 out of 85 Questions
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