Power System MCQ

Welcome to your Power System MCQ

Single line diagram of which of the following power system is possible?

Power system with LG fault

Balanced power system

Power system with LL fault

Power system with LLG fault

None

Tarapur nuclear power plant has which type of reactor?

Pressurized water reactors.

Boiling water type.

CANDU type reactors.

None of these.

None

Which of the following rotor is used in thermal power plants?

cylindrical rotor

salient pole rotor

either of these

squirrel cage rotor

None

Oxide film arrestor has which of the following properties?

Does not require daily charging.

Installed at points of transmission line where daily visit is difficult.

It is expensive.

Both A and B.

None

Single line diagram does not represents:

Ratings of machines

Neutral wire of transmission lines

Delta connection of transformer winding

Star connection of transformer winding

None

Which of the following is not neglected during formation of reactance diagram from impedance diagram?

Shunt component of Transformers

Static loads

Resistance of various power system components

Reactance of alternators

None

Which of the following is not an advantage of hydroelectric power plant?

no fuel requirement

continuous power source

low running cost

no standby losses

None

Which of the following is not a requirement for site selection of hydroelectric power plant?

Large catchment area

Rocky land

Sedimentation

Availability of water

None

Galvanised steel is generally used as

stray wire

earth wire

structural components

all of the above

None

10.

Plug setting of a relay can be altered by varying

Air gap of magnetic path

Number of ampere-turns

Adjustable back up stop

None of these

None

11.

The main objectives of electrical power transmission is/are

Transmission system must be more efficient with minimum line losses

Voltage regulation of the transmission line must be zero or minimum

Both 1 and 2

Neither 1 nor 2

None

12.

Advantages of higher transmission voltage is/are

Power transfer capability of the transmission line is increased

Transmission line losses are reduced

Area of cross section and volume of the conductor is reduced

All of the above

None

13.

What of the below mentioned statements are incorrect as compared to the HVDC system?

Distance limitation

Back to back connection is possible

Extra reactive power compensation

More corona losses

None

14.

Which of the following is an essential requirement for a peak load plant?

Economical and speedy repair

Capability of working continuously

Low operating cost

Capability of quick start

None

15.

Ferranti effect will not occur in which of the following transmission lines

long transmission lines

short transmission lines

medium transmission lines

all of the above

None

16.

Ferranti effect can be compensated by which of the following

shunt capacitor

shunt reactor

series capacitor

both 1 and 2

None

17.

Which of the following method is used for changing power factor from leading to lagging

shunt capacitor

series capacitor

shunt reactor

any of the above

None

18.

Under over excitation synchronous phase modifier works as

shunt capacitor

series capacitor

shunt reactor

any of the above

None

19.

Under excited Synchronous phase modifier works as

shunt capacitor

series capacitor

shunt reactor

any of the above

None

20.

Range of accelerating factor is

50 to 100

1 to 10

1.6 to 1.8

10.8 to 11.2

None

21.

Find the number of strands of ACSR conductor for 4 layer transmission line?

None

22.

Telecommunication lines are transposed to reduce the

Efficiency

Radio interference in communication lines

Voltage level

All of the above

None

23.

In which of the following configuration power transferability is higher?

Triangular configuration

Horizontal configuration

Same in both configuration

None of the above

None

24.

Bundled conductors in EHV transmission lines

Increase inductance

Increase capacitance

Decrease inducatance

Decrease capacitance

None

25.

The skin effect shows that

The distribution of AC current is uniform through the cross section of the conductor

Current density is more at the centre of the condutor

Current density is lower at the surface of the condutor

Current density is more at the surface of the condutor

None

1 out of 25

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Power System MCQ

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