The correct mixture strength (by weight) for petrol is about
The effective inhibitor of pre-ignition is
Reactors for propulsion applications are designed for
The nuclear power station at Tarapur has the reactor of the __________ type.
Where reactor operation is designed with fast neutrons such as in reactors using highly enriched fuel, the moderator used is
The pre-ignition occurs before the spark is produced whereas detonation develops after the introduction of spark.
In a four stroke cycle petrol engine, the charge is compressed when both the valves (i.e. inlet valve and exit valve) are closed,
Nuclear reactors are used
The pressure inside the cylinder is __________ the atmospheric pressure during the exhaust stroke.
The knocking tendency in spark ignition engines can be decreased by adding dopes like tetra ethyle lead and ethylene dibromide.
In compression ignition engines, swirl denotes a
A moderator
Pre-ignition is caused by the spontantaneous combustion of the mixture before the end of the compression stroke, and is due to
Alpha-methyl-naphthalene (C11 H10) has a cetane number of
In a four stroke cycle petrol engine, the pressure inside the engine cylinder during the suction stroke is __________ the atmospheric pressure.
Lubrication in I.C. engines dissipates the heat generated from the moving parts due to friction.
Which of the following statement is correct regarding petrol engines?
For the same maximum pressure and heat input, the exhaust temperature of petrol engine is __________ than that of diesel engine.
The working pressure and temperature inside the cylinder of an internal combustion engine is __________ as compared to a steam engine.
The purpose of testing an internal combustion engine is
The primary fuel used in nuclear power plants is
In nuclear power plants, due to reflector, less fuel is needed to generate sufficient neutrons to sustain a chain reaction.
In a diesel engine, the duration between the time of injection and ignition, is known as
The energy released during the fission of one atom of Uranium -in million electron volts is about
The thermal efficiency of diesel engines on weak mixtures is
A moderator generally used in nuclear power plants is
The increase of cooling water temperature in petrol engine will __________ the knocking tendency.
A mixture containingof iso-octane andof normal heptane will have
In a four stroke cycle diesel engine, the exhaust valve
The two stroke cycle engines have lighter flywheel.