Category: Electric Traction

A. overcome the gravity component of train mass
B. overcome friction, windage and curve resistance
C. accelerate the train mass
D. do all of the above

A. Mail and express trains
B. Superfast trains
C. Suburban and Urban electric trains
D. All trains

A. Rust on the rails
B. Dust on the rails
C. Sand on the rails
D. All of the above

A. It avoids wear of track
B. Motor continues to remain loaded during braking
C. It is instantaneous
D. More heat is generated during braking

A. Corrosion problems in the under-ground pipe work
B. Short time power failure interrupts traffic for hours
C. High capital outlay in fixed installations beside route limitation
D. Interference with communication lines
C. All of the above

A. reduce friction
B. increase friction
C. facilitate braking
D. facilitate in taking turns

A. Main line service
B. Urban service
C. Sub-urban service
D. Urban and sub-urban service

A. easy speed control
B. high starting tractive effort
C. equipment capable of with standing large temporary loads
D. all of the above

A. Steam locomotives
B. Diesel locomotives
C. Electric locomotives
D. Equal in all of the above

A. 20 to 25 percent
B. 30 to 40 percent
C. 45 to 55 percent
D. 60 to 70 percent