Nuclear reactors are used

The exhaust valve in a four stroke cycle petrol engine

The predominent isotope of the naturally occuring element is

A moderator generally used in nuclear power plants is

The primary fuel used in nuclear power plants is

In a four stroke cycle petrol engine, the compression

In compression ignition engines, swirl denotes a

Fuel oil consumption guarantees for I .C. engine are usually based on

The fuel air ratio in a petrol engine fitted with suction carburettor, operating with dirty air filter as compared to clean filter will be

In diesel engines, the fuel is injected in the form of very fine spray, into the engine cylinder, which gets ignited due to high temperature of the compressed air.

Pre-ignition is caused by the spontantaneous combustion of the mixture before the end of the compression stroke, and is due to

The expansion of fuel in a four stroke cycle diesel engine

In a diesel engine, the duration between the time of injection and ignition, is known as

Reactors for propulsion applications are designed for

In open combustion chamber in diesel engines, the shape and layout of the piston crown, the inlet port and the valve produce the turbulent effect of fuel mixture.

Each fission of Uproduces on the average __________ fast neutrons as a product of reaction.

The pressure at the end of compression in the case of diesel engine is of the order of

The air standard efficiency of an I.C. engine depends on (A) Fuel used

The ratio of the indicated thermal efficiency to the air standard efficiency is known as

The compression ignition engines are governed by