Power System - I (3140914) MCQs

MCQs of Mechanical Features and Design of Overhead Transmission Line

Showing 51 to 60 out of 108 Questions
3 4 5 6 7 8
51.
If 132 kV line passes over a residential building, the minimum vertical clearance from the roof of the building should be
(a) 4.57 m
(b) 5 m
(c) 6 m
(d) 3 m
Answer:

Option (a)

52.
Minimum 132 kV transmission line and ground is
(a) 6.4 m
(b) 3.2 m
(c) 10.5 m
(d) 7.5 m
Answer:

Option (a)

53.
Spacing between two conductors for 400 kV line is
(a) 8 m
(b) 11 m
(c) 14 m
(d) 17 m
Answer:

Option (a)

54.
The horizontal spacing between phase conductors of 132 kV transmission line is
(a) 8 m
(b) 6 m
(c) 4 m
(d) 2 m
Answer:

Option (b)

55.
Stranded conductors usually has a central wire around which there are successive layers of 6, 12, 18, 24 wires. For n-layers the total number of individual wires are
(a) 3n(n+1)d
(b) 3(n+1)d
(c) (2n-1)d
(d) 3(n-1)d
Answer:

Option (c)

56.
Diameter of each stranded conductor is d then the diameter of n-layer stranded conductor is
(a) (2n+1)d
(b) 3(n+1)d
(c) (2n-1)d
(d) 3(n-1)d
Answer:

Option (a)

57.
What will happen when a line conductor of an overhead supply line breaks down and touches the earth?
(a) Current flows to the earth
(b) Supply voltage increases
(c) No current flows in the conductor
(d) None of above
Answer:

Option (a)

58.
Top most conductor in HV transmission line is
(a) R-phase conductor
(b) Y-phase conductor
(c) B-phase conductor
(d) Earth conductor
Answer:

Option (d)

59.
The color of neutral wire of 3-core flexible cable
(a) Blue
(b) Red
(c) Black
(d) Brown
Answer:

Option (c)

60.
Insulators used on EHT transmission lines are made of
(a) PVC
(b) Porcelain
(c) Glass
(d) Stealite
Answer:

Option (b)

Showing 51 to 60 out of 108 Questions
3 4 5 6 7 8