POWER SYSTEMS QUIZ

On what factors does the selection of a water turbine depend

Working head.

Speed.

Nature of load.

All of above.

TRUE ANSWER : ?
YOUR ANSWER : ?

Advantages of per unit system is/are

No units for any quantity

All of these

It has units for all quantities

Need of transformation ratio

TRUE ANSWER : ?
YOUR ANSWER : ?

A CANDU reactor uses

highly enriched uranium as fuel and water as moderator and coolant.

enriched uranium as fuel and ordinary water as moderator and cooler.

natural uranium as fuel and heavy water as moderator and coolant.

only fertile materials.

TRUE ANSWER : ?
YOUR ANSWER : ?

By using guard ring in a transmission line, its string efficiency

decrease

remains unaffected

None of these

increase

TRUE ANSWER : ?
YOUR ANSWER : ?

Merze price current scheme protection is used in

both A and B.

bus bars.

transformer.

alternator.

TRUE ANSWER : ?
YOUR ANSWER : ?

A CT is connected in ___________________ with the line.

both A and B.

series.

across.

not connected.

TRUE ANSWER : ?
YOUR ANSWER : ?

If the time of operation of a relay for unity TMS is 10 sec. the time of operation of 0.5 TMS will be _______________ secs.

3.

5.

7.

20.

TRUE ANSWER : ?
YOUR ANSWER : ?

The fact that current density is higher at the surface when compared to centre is known as

All of these

proximity effect

skin effect

carona

TRUE ANSWER : ?
YOUR ANSWER : ?

Zero voltage regulation is possible only for

lagging power factor

All of these

unity power factor

leading power factor

TRUE ANSWER : ?
YOUR ANSWER : ?

When series reactor is used in generating stations, the fault current magnitude is

increased

reduced

remains unaffected

any of the above

TRUE ANSWER : ?
YOUR ANSWER : ?