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191.

Which of the following locomotive has the highest operational availability?

A.	Steam	B.	Diesel
C.	Electric

192.

In Kando system for electric locomotion

A.	dc supply is used to run series motors	B.	single phase supply is converted into three phase system
C.	three phase ac is converted into dc	D.	single phase ac is converted into dc

193.

An ideal traction system should have

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

194.

Regenerative braking is

A.	more	B.	more
C.	less	D.	less

195.

In electric traction, the torque exerted is

A.	continuous, pulsating	B.	pulsating, continuous
C.	pulsating, pulsating	D.	continuous, continuous