The return circuit for tramcars is through
Overhead lines for power supply to tramcars are at a minimum height of
In case of ________ free running and coasting periods are generally long.
Answer: main-line service
Specific energy consumption is affected by which of the following factors ?
have maximum unbalanced forces
Answer: Steam locomotives
An ideal traction system should have
Energy consumption in propelling the train is required for which of the following?
When a bogie negotiates a curve, reduction in adhesion occurs resulting in sliding. Thus sliding is acute when
Series motor is not suited for traction duty due to which of the following account ?
Answer: Current surges after temporary switching off supply
Locomotive having monomotor bogies
Answer: has all above qualities
In main line service as compared to urban and suburban service
Specific energy consumption becomes
For three-phase induction motors which of the following is the least efficient method of speed control ?
The voltage used for suburban trains in D.C. system is usually
The value of co-efficient of adhesion will be high when rails are
Answer: cleaned with sand
method can bring the locomotive to dead stop.
Battery operated trucks are used in
Answer: factories for material transportation
The resistance encountered by a train in motion is on account of
Vacuum is created by which of the following?
Which of the following braking systems is used on steam locomotives ?