Mechanical Engineering IC Engines and Nuclear Power Plants Online Test

The reference fuels for knock rating of spark ignition engines would include

The diesel engines are also known as __________ engines.

In a four stroke cycle, the minimum temperature inside the engine cylinder occurs at the

In hit and miss governing, the fuel supply is cut-off completely during one or more number of cycles.

The thermal efficiency of a standard Otto cycle for a compression ratio of 5.5 will be

The ratio of the volume of charge admitted at N.T.P. to the swept volume of the piston is called

The exhaust valve in a four stroke cycle petrol engine

Nuclear reactors are used

A moderator generally used in nuclear power plants is

The brake power of a diesel engine, keeping other parameters constant, can be increased by

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

The object of supercharging the engine is

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.

In a four stroke cycle petrol engine, the charge is ignited at

A moderator, in nuclear power plants, is a medium introduced into the fuel mass in order to

Where reactor operation is designed with fast neutrons such as in reactors using highly enriched fuel, the moderator used is

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

The detonating tendency in petrol engines increases with increase of compression ratio.

Each fission of U235 produces on the average __________ fast neutrons as a product of reaction.

Reactors for propulsion applications are designed for

In petrol engine, using a fixed octane rating fuel and fixed compression ratio, supercharging will __________ the knocking tendency.

Ordinary water is sometimes used as moderator when enriched uranium is used as a fuel in nuclear power plants.

The compensating jet in a carburettor supplies almost constant amount of petrol at all speeds because the

The effective inhibitor of pre-ignition is

The purpose of testing an internal combustion engine is

The thermal efficiency of diesel engines is about

A diesel engine has

The self ignition temperature of petrol is __________ as compared to diesel oil.