Electric Traction MCQ Questions & Answers | Electrical Engineering

A. Hydraulic system

B. Pneumatic system

C. Vacuum system

D. None of the above

A. Easy speed control

B. High starting tractive effort

C. Equipment capable of withstanding large temporary loads

D. All of the above

A. Has better coefficient of adhesion

B. Are suited both for passenger as well as freight service

C. Has better riding qualities due to the reduction of lateral forces

D. Has all above qualities

A. 50 to 200

B. 500 to 1000

C. 1500 to 2500

D. 3000 to 5000

A. Reduced current method

B. Tap changing control of transformer

C. Series parallel operation of motors

D. All of the above

A. 20 to 25 percent

B. 30 to 40 percent

C. 45 to 55 percent

D. 60 to 70 percent

A. Cascade control

B. Pole changing

C. Rheostat control

D. Combination of cascade and pole changing

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. It has longer free running period

B. It has longer coasting period

C. Accelerating and braking periods are comparatively smaller

D. All of the above

A. Uneven distribution of tractive effect

B. Suitability for passenger as well as freight service

C. Lot of skidding

D. Low coefficient of adhesion