Power System - II (3150911) MCQs

MCQs of Basic Principles

Showing 91 to 100 out of 135 Questions
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91.
Consider the following statements
1. By using bundle conductors in overhead line,  corona loss is reduced
2. By using bundle conductors,  inductance of transmission line increases and capacitance reduces
3. Corona loss causes interference in adjoining communication lines
 Which of the statements are correct?
(a) 1 and 2
(b) 2 and 3
(c) 1 and 3
(d) 1, 2 and 3
Answer:

Option (c)

92.
The size of conductor on modern EHV lines is obtained based on
(a) Voltage drop
(b) Current density
(c) Corona
(d) Skin effect
Answer:

Option (c)

93.
The conductors of EHV line is selected on the basis of
(a) Current carrying capacity
(b) Corona
(c) Line voltage
(d) None of above
Answer:

Option (b)

94.
Frequency of resonant vibration lies in the range of
(a) 10 to 20 Hz
(b) 100 to 200 Hz
(c) 50 to 200 Hz
(d) 200 to 300 Hz
Answer:

Option (c)

95.
The insulation level of 400 kV EHV overhead transmission line is decided on the basis of
(a) Lightning over voltage
(b) Switching over voltage
(c) Corona  inception voltage
(d) Radio and TV interference
Answer:

Option (b)

96.
Series capacitor is used in transmission line to
(a) Compensate the voltage drop
(b) To reduce line loss
(c) Limit short circuit current
(d) Improve load power factor
Answer:

Option (a)

97.
Series capacitive compensation in EHV transmission line is used to
(a) Reduce the line loading
(b) Improve the stability of system
(c) Reduce the voltage profile
(d) Improve the protection of life
Answer:

Option (b)

98.
Series capacitor
(a) Increases the power transmission capability of EHV long line
(b) Provides voltage control
(c) Increases shunt admittance of line
(d) None of above
Answer:

Option (a)

99.
Series capacitors can be used in distribution lines
(a) To provide reactive power compensation
(b) To reduce the receiving end voltage under light load condition
(c) To reduce voltage drop
(d) To reduce line losses
Answer:

Option (a)

100.
Shunt compensation in in EHV line is used to improve
(a) Stability and fault level
(b) Fault level and voltage
(c) Voltage profile and stability
(d) Stability,  fault level and voltage profile
Answer:

Option (c)

Showing 91 to 100 out of 135 Questions
7 8 9 10 11 12