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Free download in PDF Transmission Line 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 like IIT-JEE, B-Tech etc. These short solved questions or quizzes are provided by Gkseries.
(1)
Which of the following parameters is not a primary parameter?
[A]
Resistance
[B]
Attenuation constant
[C]
Capacitance
[D]
Conductance
Answer: Attenuation constant
(2)
The networks in which the R, L, C parameters are individually concentrated or lumped at discrete points in the circuit are called
[A]
Lumped
[B]
Distributed
[C]
Parallel
[D]
Paired
(3)
The leakage current in the transmission lines is referred to as the
[A]
Resistance
[B]
Radiation
[C]
Conductance
[D]
Polarisation
(4)
Find the receiving impedance of a transmission line having a voltage of 24V and a conduction current of 1.2A is
[A]
25.2
[B]
22.8
[C]
28.8
[D]
20
(5)
The propagation constant of a transmission line with impedance and admittance of 9 and 16 respectively is
[A]
25
[B]
144
[C]
12
[D]
None of the above
(6)
Find the characteristic impedance expression in terms of the inductance and capacitance parameters.
[A]
Zo = √(LC)
[B]
Zo = LC
[C]
Zo = √(L/C)
[D]
Zo = L/C
(7)
In long transmission lines Resistance and Capacitance parameters of lines are connected in __________
[A]
Series, shunt
[B]
Series, series
[C]
Shunt, shunt
[D]
Shunt, parallel
(8)
Range of surge impedance for an underground cables is _____________
[A]
12 Ω – 144 Ω
[B]
40 Ω – 60 Ω
[C]
400 Ω – 600 Ω
[D]
300 Ω – 900 Ω
(9)
The voltage rating of long transmission line is _________
[A]
20 KV to 100 KV
[B]
Upto 20 KV
[C]
Above 100 KV
[D]
60 KV to 80 KV
(10)
Which of the following regulation is considered to be the best
[A]
2%
[B]
30%
[C]
70%
[D]
98%
(11)
The characteristic impedance of a transmission line depends upon
[A]
shape of the conductor
[B]
surface treatment of the conductors
[C]
conductivity of the material
[D]
geometrical configuration. of the conductors
Answer: geometrical configuration. of the conductors
(12)
When the power is to be transmitted over a distance of 500 km, the transmission voltage should be in the range
[A]
150kV - 220kV
[B]
110 kV - 150 kV
[C]
66 kV - 100 kV
[D]
33 kV - 66 kV
(13)
In order to reduce skin effect at UHF
[A]
conductors are painted
[B]
conductors are anodized
[C]
copper lubes with silver plating are used
[D]
copper rods with silver plating are used
Answer: copper lubes with silver plating are used
(14)
Shunt capacitance is usually neglected in the analysis of
[A]
Medium transmission lines
[B]
Long transmission lines
[C]
Medium as well as long transmission lines
[D]
Short transmission lines
Answer: Short transmission lines
(15)
Neglecting losses in a transmission system, if the voltage is doubled, for the same power transmission, the weight of conductor material required will be
[A]
four times
[B]
double
[C]
half
[D]
one fourth
(16)
By which of the following systems electric power may be transmitted ?
[A]
Overhead system
[B]
Underground system
[C]
Both (a) and (b)
[D]
None of the above
(17)
The underground system cannot be operated above
[A]
440 V
[B]
11 kV
[C]
33 kV
[D]
66 kV
(18)
The wooden poles well impregnated with creosite oil or any preservative compound have life
[A]
from 2 to 5 years
[B]
10 to 15 years
[C]
25 to 30 years
[D]
None of the above
(19)
Galvanised steel wire is generally used as
[A]
stay wire
[B]
earth wire
[C]
structural components
[D]
all of the above
(20)
The usual spans with R.C.C. poles are
[A]
40—50 meters
[B]
60—100 meters
[C]
80—100 meters
[D]
300—500 meters
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