Related Questions

When I was in town, I tried to" take full advantage" of the many public libraties there. Here ‘take full advantage’ means
A take pictures
B make a survey
C make good use
D visit to get an idea
When I was in town , I tried to take full advantage of the many public libraries there. Here 'take full advantage' means:
A take pictures
B make a survey
C make good use
D visit to get an idea
Which of the following braking systems on the locomotives is costly?
A Regenerative braking on electric locomotives
B Vacuum braking on diesel locomotives
C Vacuum braking on steam locomotives
D All braking systems are equally costly
Which of the following braking systems is used on steam locomotives?
A Hydraulic system
B Pneumatic system
C Vacuum system
D None of the above
If the terminals of armature of D.C. motor are interchanged, this action will offer following kind of braking
A Regenerative
B Plugging
C Dynamic braking
D None of the above
For which types of D.C. motor, dynamic braking is generally used?
A Shunt motors
B Series motors
C Compound motors
D All of the above
During rheostatic braking of D.C. series motors
A Motor is run as a generator
B Motor is reversed in direction
C Motor is run at reduced speed
D None of these
Regenerative method of braking is based on that
A Back e.m.f. is less than the applied voltage
B Back e.m.f. is equal to the applied voltage
C Back e.m.f. of rotor is more than the applied voltage
D None of the above
The braking retardation is usually in the range
A 0.15 to 0.30 km phps
B 0.30 to 0.6 km phps
C 0.6 to 2.4 km phps
D 3 to 5 km phps
Battery operated scooter for braking uses
A Plugging
B Mechanical braking
C Regenerative braking
D Rheostatic braking

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