Question: Series motor is not suited for traction duty due to which of the following account ?

• 1. Less current drain on the heavy load torque
• 2. Current surges after temporary switching off supply
• 3. Self relieving property
• 4. Commutating property at heavy load

Question: The return circuit for tramcars is through_______________?

• 1. neutral wire
• 2. rails
• 3. cables
• 4. common earthing

Question: In case of _________________ free running and coasting periods are generally long ?

• 1. main-line service
• 2. urban service
• 3. sub-urban service
• 4. all of the above

Question: have maximum unbalanced forces_______________?

• 1. Diesel shunters
• 2. Steam locomotives
• 3. Electric locomotives
• 4. Diesel locomotives

Question: When a bogie negotiates a curve, reduction in adhesion occurs resulting in sliding. Thus sliding is acute when_______________?

• 1. wheel base of axles is more
• 2. degree of curvature is more
• 3. both A and B
• 4. none of the above

Question: An ideal traction system should have_______________?

• 1. easy speed control
• 2. high starting tractive effort
• 3. equipment capable of with standing large temporary loads
• 4. all of the above

Question: Energy consumption in propelling the train is required for which of the following?

• 1. Work against the resistance to motion
• 2. Work against gravity while moving up the gradient
• 3. Acceleration
• 4. All of the above

Question: Overhead lines for power supply to tramcars are at a minimum height of______________?

• 1. 3 m
• 2. 6 m
• 3. 10 m
• 4. 15 m

Question: Specific energy consumption is affected by which of the following factors ?

• 1. Retardation and acceleration values
• 2. Gradient
• 3. Distance between stops
• 4. All of the above

Question: Locomotive having monomotor bogies________________?

• 1. has better coefficient of adhesion
• 2. are suited both for passanger as well as freight service
• 3. has better riding qualities due to the reduction of lateral forces
• 4. has all above qualities