Power System - I (3140914) MCQs

MCQs of Transmission Line Parameters

Showing 61 to 70 out of 103 Questions
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61.
Increasing the frequency of transmission line will
(a) Increase shunt reactance
(b) Decrease line resistance
(c) Increase line resistance
(d) Decrease series reactance
Answer:

Option (c)

62.
Skin effect exist in
(a) Cable carrying DC current
(b) DC transmission line
(c) AC transmission line
(d) DC as well as AC transmission line
Answer:

Option (c)

63.
Skin effect in a conductor becomes more pronounced
(a) At higher frequency
(b) At lower frequency
(c) At DC
(d) None of above
Answer:

Option (a)

64.
Which of the following parameters depend upon the supply frequency?
(a) R and C only
(b) L and C only
(c) R and L only
(d) R, L, C and G only
Answer:

Option (d)

65.
Skin effect in conductor results in
(a) Increase in DC resistance
(b) Decrease in AC resistance
(c) Increase in AC resistance
(d) None of above
Answer:

Option (c)

66.
Skin effect
(a) Increases the effective resistance and internal reactance
(b) Reduces effective resistance and internal reactance
(c) Increases effective resistance but reduces internal reactance
(d) Reduces effective resistance but increases internal reactance
Answer:

Option (c)

67.
Skin effect of a conductor reduces with the increase in
(a) Supply frequency
(b) Resistivity of conductor material
(c) Cross section of conductor
(d) Permeability of conductor material
Answer:

Option (b)

68.
Skin effect in conductor is proportional to
(a) Square root of conductor diameter
(b) Conductor diameter
(c) Square of conductor diameter
(d) None of above
Answer:

Option (c)

69.
In order to reduce the skin effect at UHF
(a) Copper tubes with silver plating are used
(b) Copper roads with silver plating are used
(c) Anodized conductors are used
(d) Painted conductors are used
Answer:

Option (a)

70.
The inductance of single phase two wire power transmission line per kilometer gets doubled when
(a) Distance between the wires is doubled
(b) Distance between the wires is increased four fold
(c) Distance between the wires is increased as square of original distance
(d) Radius of the wire is doubled
Answer:

Option (c)

Showing 61 to 70 out of 103 Questions
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