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Free download in PDF Transmission and Distribution Multiple Choice Questions and Answers for competitive exams. These short objective type questions with answers are very important for Board exams as well as competitive exams. These short solved questions or quizzes are provided by Gkseries.
81
Considerable power is taken up for charging
[A]
D.C. transmission
[B]
A.C. transmission
[C]
Electron transmission
[D]
None of these
Answer: A.C. transmission
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
[C]
Load 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
Answer: Attenuation constant
88
In short lines, regulation and pressure drop are
[A]
Vectorially equal
[B]
Equal in phase
[C]
Numerically equal
[D]
None of these
Answer: Numerically equal
89
Secondary transmission and distribution system are of
[A]
Radial structure
[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
[B]
Leading power factor
[C]
Unity power factor
[D]
None of these
Answer: Leading power factor
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
Answer: Rotor current and reactance
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
Answer: Static transmission capacity
93
Typical load always consumers
[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
Answer: Line resistance is considered
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
Answer: Scarcity of copper
97
Vertical loading in pole results on account of
[A]
Vibration of conductors
[B]
Dead weight of the equipment
[C]
Conductor tension at angles in lines
[D]
Interference in transmission lines
Answer: Dead weight of the equipment
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
100
Booster transformer is located at
[A]
Mid point of line
[B]
Receiving end
[C]
Sending end
[D]
All of these
Answer: Mid point of line
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