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Free download in PDF Transmission Line Multiple Choice Questions with Answers for competitive exams. These short objective type questions with answers are very important for Board exams as well as competitive exams like IIT-JEE, B-Tech etc. These short solved questions or quizzes are provided by Gkseries.
61
Series capacitors on transmission lines are of little use when the load VAR requirement is
[A]
Large
[B]
Small
[C]
Fluctuating
[D]
All of the above
62
The lines having R, L, C distributed along the circuit are called
[A]
Lumped
[B]
Distributed
[C]
Parallel
[D]
Paired
63
Which primary parameter is uniformly distributed along the length of the conductor?
64
The primary parameter that is associated with the electric charges is
[A]
G
[B]
R
[C]
C
[D]
Any of the above
65
The characteristic impedance of a transmission line with impedance and admittance of 16 and 9 respectively is
[A]
25
[B]
1.33
[C]
7
[D]
0.75
66
When a transmission line has a load impedance same as that of the characteristic impedance, the line is said to be
[A]
Parallel
[B]
Perpendicular
[C]
Polarized
[D]
Matched
67
Length of long transmission line is more than ___________
[A]
80 Km
[B]
50 Km
[C]
120 Km
[D]
200 Km
68
Range of surge impedance for an overhead transmission line is ____________
[A]
12 Ω – 144 Ω
[B]
40 Ω – 60 Ω
[C]
400 Ω – 600 Ω
[D]
300 Ω – 900 Ω
69
Synchronous phase modifiers are installed at which of the following position of the transmission line?
[A]
Reciving end
[B]
Sending end
[C]
Between reciving end and sending end
[D]
Near reciving end
70
What is the value of characteristics impedance for loss free transmission line?
[A]
√(L/C)
[B]
√(R/C)
[C]
√(LC)
[D]
√(C/L)
71
The leakage current through the shunt admittance is __________
[A]
Maximum at sending end
[B]
Maximum at receiving end
[C]
Uniform over length of line
[D]
Maximum at centre of line
Answer: Maximum at sending end
72
The bundling of conductors is done primarily to
[A]
reduce reactance
[B]
increase reactance
[C]
increase ratio interference
[D]
reduce radio interference
73
For a distortion-less transmission line (G = shunt conductance between two wires)
[A]
R/L = G/C
[B]
RL=GC
[C]
RG=LC
[D]
any of the above
74
A relay used on long transmission lines is
[A]
mho's relay
[B]
reactance relay
[C]
impedance relay
[D]
All of the above
75
Total load transmitted through a 3 phase transmission line is 10,000 kW at 0.8 power factor lagging. The I2R losses are 900 kW. The efficiency of transmission line is
[A]
60%
[B]
90%
[C]
95%
[D]
99%
76
The chances of corona are maximum during
[A]
Summer Heat
[B]
Winter
[C]
Dry Weather
[D]
Humid Weather
77
The power transmitted will be maximum when
[A]
Sending end voltage is more
[B]
Receiving end voltage is more
[C]
Reactance is high
[D]
Corona losses are least
Answer: Sending end voltage is more
78
When two conductors each of radius r are at a distance D, the capacitance between the two is proportional to
[A]
loge (D/r)
[B]
loge (r/D)
[C]
1/loge (D/r)
[D]
None of the above
79
Are the conductors, which connect the consumer’s terminals to the distribution
[A]
Distributors
[B]
Service mains
[C]
Feeders
[D]
None of the above
80
Overhead system can be designed for operation up to
[A]
11 kV
[B]
33 kV
[C]
66 kV
[D]
All of the above
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