Practice Transmission And Distribution Multiple Choice Questions Quiz-4 - MCQGeeks.com

Q.1

The effect of corona can be detected by

Presence of ozone detected by odour
Hissing sound
Faint luminous glow of bluish color
All of the above

Q.2

In a D.C. 3-wire distributor using balancers and having unequal loads on the two sides

both balancers run as generators
both balancers run as motors
balancer connected to lightly- loaded side runs as a motor
balancer connected to heavily- loaded side runs as a motor

Q.3

High voltage transmission lines use

Suspension insulators
Pin insulators
Both (A) and (B)
None of the above

Q.4

Which of the following materials is used for overhead transmission lines?

Steel cored aluminium
Galvanised steel
Cadmium copper
Any of the above

Q.5

Which of the following relays is used on long transmission lines?

Impedance relay
Mho's relay
Reactance relay
None of the above

Q.6

Which of the following is usually not the generating voltage?

6.6 kV
8.8 kV
11 kV
13.2 kV

Q.7

When the interconnector between two stations has large reactance

The transfer of power will take place with voltage fluctuation and noise
The transfer of power will take place with least loss
The stations will fall out of step because of large angular displacement between the stations
None of the above

Q.8

Distribution lines in India generally use

Wooden poles
R.C.C. poles
Steel towers
None of the above

Q.9

The frequency of voltage generated, in case of generators, can be increased by

Using reactors
Increasing the load
Adjusting the governor
Reducing the terminal voltage

Q.10

In aluminium conductors, steel core is provided to

Compensate for skin effect
Neutralise proximity effect
Reduce line inductance
Increase the tensile strength

Q.11

Overhead system can be designed for operation up to

11 kV
33 kV
66 kV
400 kV

Q.12

Which of the following is the demerit of a 'constant voltage transmission system' ?

Increase of short-circuit current of the system
Availability of steady voltage at all loads at the line terminals
Possibility of better protection for the line due to possible use of higher terminal reactants
Improvement of power factor at times of moderate and heavy loads
Possibility of carrying increased power for a given conductor size in case of long-distance heavy power transmission

Q.13

Which of the following methods is used for laying of underground cables?

Direct laying
Draw-in-system
Solid system
All of the above

Q.14

The minimum clearance between the ground and a 220 kV line is about

4.3 m
5.5 m
7.0 m
10.5 m

Q.15

A 3-phase 4-wire system is commonly used on

Primary transmission
Secondary transmission
Primary distribution
Secondary distribution

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