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251.

Dynamo in automobile is a

A.	series generator	B.	shunt generator
C.	either of (A) and (B) above	D.	none of the above

252.

If a lead acid battery is fully charged at specific gravity of 1.28 and fully discharged at specific gravity of 1.11 then at specific gravity of 1.19, the battery will be

A.	nearly fully charged	B.	more than 50% charged
C.	50% charged	D.	less than 50% charged

253.

Which region of an automobile tyre is subjected to greatest flexing action?

A.	Bead	B.	Side wall
C.	Shoulder	D.	Tread

254.

Bead wires are made of

A.	steel	B.	copper
C.	zinc	D.	Aluminium

255.

Which of the following action reduces the life of tyre?

A.	Low air pressure	B.	Extra load
C.	Frequent braking	D.	All of the above

256.

The angle between the cord and the centre line of the tread is called

A.	tread angle	B.	side wall angle
C.	crown angle	D.	none of the above

257.

The number of revolutions per km for a free rolling tyre are less than that calculated from its static radius. This difference in number of revolutions is due to

A.	forces in the contact area that cause slight forward of the tread	B.	hysteresis of the tyre materials which make the dynamic loaded radius somewhat larger than the static radius
C.	either of (A) and (B) above	D.	none of the above

258.

The advanctage of stratified charge engine is

A.	better part load efficiency	B.	resistance to knocking tendency
C.	better volumetric efficiency	D.	All of the above

259.

The disadvantage of stratified charge engine is

A.	reduced power for a given engine size	B.	higher weight for bhp
C.	poor reliability	D.	All of the above

260.

Which of the following vehicle does not have battery?

A.	Ambassador car	B.	Maruti car
C.	Vespa scooter	D.	Tata truck