68) A supercharged engine as compared to an ordinary engine

requires smaller foundation

is lighter

consumes less lubricating oil

all of these

Answer is:

all of these

Explanation:

A supercharged engine as compared to an ordinary engine
* requires smaller foundation
* is lighter
* consumes less lubricating oil

Fuel pump

Fuel injector

Governor

Carburettor

Answer is:

A fine fuel spray mixed with air is ignited by the heat of compression which is at a high pressure.

The fuel supplied to the engine cylinder is mixed with necessary amount of air and the mixture in ignited with the help of a spark plug.

The fuel is first evaporated after passing through a carburettor and is mixed with air before ignition.

all of the above

Answer is:

has no effect on

increases

decreases

none of these

Answer is:

U₂₃₄

U₂₃₅

U₂₃₈

all of these

Answer is:

Explanation:

Uranium has isotopes
* U₂₃₄
* U₂₃₅
* U₂₃₈