ELECTRIC TRACTION QUIZ

The resistance encountered by a train in motion is on account of

Resistance offered by air

Friction at various parts of the rolling stock

All of the listed here

Friction at the track

TRUE ANSWER : ?
YOUR ANSWER : ?

The speed of a superfast train is

60 kmph

75 kmph

More than 100 kmph

100 kmph

TRUE ANSWER : ?
YOUR ANSWER : ?

Vacuum is created by which of the following?

Vacuum pump

Ejector

Any of the listed here

None of the listed here

TRUE ANSWER : ?
YOUR ANSWER : ?

_________ locomotive has the highest operational availability.

Diesel

Electric

All of the listed here

Steam

TRUE ANSWER : ?
YOUR ANSWER : ?

The friction at the track is proportional to

Speed

1/speed

1/(speed)²

None of the listed here

TRUE ANSWER : ?
YOUR ANSWER : ?

Suri transmission is

Mechanical electrical

Electrical pneumatic

Hydro mechanical

Hydro pneumatic

TRUE ANSWER : ?
YOUR ANSWER : ?

For 25 kV single phase system power supply frequency is

60 Hz

100 Hz

50 Hz

25 Hz

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following is the advantage of electric braking?

Motor continues to remain loaded during braking

It is instantaneous

More heat is generated during braking

It avoids wear of track

TRUE ANSWER : ?
YOUR ANSWER : ?

For three-phase induction motors which of the following is the least efficient method of speed control?

Combination of cascade and pole changing

Cascade control

Rheostat control

Pole changing

TRUE ANSWER : ?
YOUR ANSWER : ?

The coasting retardation is around

2.6 km phps

1.6 km phps

0.16 km phps

3.6 km phps

TRUE ANSWER : ?
YOUR ANSWER : ?

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