Power System - I (3140914) MCQs

MCQs of Mechanical Features and Design of Overhead Transmission Line

Showing 41 to 50 out of 108 Questions
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41.
Which of the following statement is correct?
(a) Ice on conductor increases the skin effect
(b) Wind pressure reduces the corona effect
(c) Wind pressure is taken to act at perpendicular to that of ice
(d) Ice on conductors reduces sag
Answer:

Option (c)

42.
Wind loading in coastal regions is in the range of
(a) 50 kg/m2
(b) 150 kg/m2
(c) 100 kg/m2
(d) 200 kg/m2
Answer:

Option (b)

43.
The maximum tension in a section of overhead line conductor between two supports of unequal height occurs at
(a) Higher support
(b) Lower support
(c) Midpoint of conductor
(d) None of above
Answer:

Option (a)

44.
Stringing chart is useful for
(a) Finding the sag
(b) Design of tower
(c) Design of insulator string
(d) Finding the distance between tower
Answer:

Option (a)

45.
Hot template curves are plots of
(a) Temperature and humidity
(b) Conductor sag and span length
(c) Conductor weight and sag
(d) None of above
Answer:

Option (b)

46.
Effect of wind pressure is more predominant on
(a) Insulator
(b) Transmission line
(c) Supporting towers
(d) None of above
Answer:

Option (c)

47.
Galloping in transmission line conductor arises due to
(a) Asymmetrical layers of ice formation
(b) Vortex phenomenon in light winds
(c) Heavy weight of the line conductors
(d) Adoption of horizontal current configuration
Answer:

Option (a)

48.
Sag of conductors of a transmission line is 2.5 m when the span is 250 m. If the height of supporting tower is increased by 25%, the sag is
(a) Reduced by 25%
(b) Increased by 25%
(c) Reduced by 12.5%
(d) Remain unchanged
Answer:

Option (d)

49.
Minimum clearance of the high voltage lines from ground across streets is
(a) 3 m
(b) 5 m
(c) 6 m
(d) 8 m
Answer:

Option (c)

50.
Minimum horizontal clearance of a low voltage line from residential building must be
(a) 0.6 m
(b) 1.2 m
(c) 0.9 m
(d) 1.6 m
Answer:

Option (b)

Showing 41 to 50 out of 108 Questions
2 3 4 5 6 7