Transmission Line MCQs | Transmission Line Multiple Choice Questions with Answers

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Questions
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

Answer: Small
62 The lines having R, L, C distributed along the circuit are called
A Lumped
B Distributed
C Parallel
D Paired

Answer: Distributed
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63 Which primary parameter is uniformly distributed along the length of the conductor?
A G
B C
C L
D R

Answer: R
64 The primary parameter that is associated with the electric charges is
A G
B R
C C
D Any of the above

Answer: C
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

Answer: 1.33
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

Answer: Matched
67 Length of long transmission line is more than ___________
A 80 Km
B 50 Km
C 120 Km
D 200 Km

Answer: 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

Answer: 400 Ω – 600 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

Answer: Sending 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)

Answer: √(L/C)
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

Answer: reduce reactance
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

Answer: R/L = G/C
74 A relay used on long transmission lines is
A mho's relay
B reactance relay
C impedance relay
D All of the above

Answer: mho's relay
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%

Answer: 90%
76 The chances of corona are maximum during
A Summer Heat
B Winter
C Dry Weather
D Humid Weather

Answer: 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

Answer: 1/loge (D/r)
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

Answer: Service mains
80 Overhead system can be designed for operation up to
A 11 kV
B 33 kV
C 66 kV
D All of the above

Answer: 66 kV

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