Transmission and Distribution MCQs | Transmission and Distribution MCQs and Answers for competitive exams

Questions
81 Considerable power is taken up for charging
A D.C. transmission
B A.C. transmission
C Electron transmission
D None of these

82 Charging current of a line is more at
A Mid-point
B Sending end
C Receiving end
D One-third of line

83 For bulk power transmission over a long distance, economical method is transmission of
A Higher voltage
B Higher current
C Lower voltage
D None of these

84 Angle between sending and receiving end voltage is called
A Power angle
B Torque angle
D All of these

85 If a long transmission line is very lightly loaded or left open then the receiving end voltage rises. This effect is called
A Ferranti effect
B Raman effect
C Einstein’s effect
D Joules effect

86 Two terminal networks representing a 3 phase line is called
A Active network
B Passive network
C Either (a) or (b)
D None of these

87 Real part of propagation constant of a transmission line is called
A Phase constant
B Gain constant
C Attenuation constant
D None of these

88 In short lines, regulation and pressure drop are
A Vectorially equal
B Equal in phase
C Numerically equal
D None of these

89 Secondary transmission and distribution system are of
B Ring structure
C Mesh structure
D None of these

90 For a short line, receiving end voltage is more than sending end for
A Lagging power for
C Unity power factor
D None of these

91 Synchronous machines can be controlled by
A Terminal voltage and rotor current
B Rotor current and reactance
C Terminal voltage and phase angle
D All of these

92 Unit for energy transmission under steady state condition is called
A Static transmission capacity
B Static distribution
C Either (a) or (b)
D None of these

A Active power
B Reactive power
C Inverse power
D None of these

94 Characteristic impedance of a telephone line is the order of
A 50 Ω
B 75 Ω
C 60 Ω
D 100 Ω

95 Difference between surge impedance and characteristic impedance is that in surge impedance
A Line resistance is considered
B Line impedance is assumed to be zero
C Line capacitance is assumed to be zero
D Line resistance is assumed to be zero

96 Now-a-days copper is replaced by aluminum in line because of
A Scarcity of copper
B Heavy weight of copper
C High cost copper
D Less conductivity of copper

A Vibration of conductors
B Dead weight of the equipment
C Conductor tension at angles in lines
D Interference in transmission lines

98 Voltage control method used in transmission system is by
A Tap changing transformers
B Injection of reactive power
C Booster transformer
D All of these

99 Concrete pole are used because of their
A Longer life
B Less maintenance cost
C Both (a) and (b)
D None of these