The mean effective pressure of a diesel engine having fixed compression ratio will __________ if cut off ratio decreases.
Uranium has isotopes
The cetane (C16H34) which is a straight chain paraffin is assigned a cetane number of
The voltage required to produce a spark across the gap, between the sparking points is
The ignition quality of diesel oil is expressed by
The injection of fuel by external source is not required in case of engines working on Otto cycle.
During idling, a petrol engine requires __________ mixture.
A petrol engine, during suction stroke draws
The engines in which the combustion of fuel takes place inside the engine cylinder are called internal combustion engines.
Which of the following statement is correct regarding normal cetaine?
A fuel of cetane numberhas the same ignition quality as a mixture of
The maximum propulsive efficiency of a turbo-jet engine is at a speed of
Reflector in nuclear power plants __________ neutron leakage.
Enriched uranium may contain fissionable contents from
The inlet valve of a four stroke cycle internal combustion engine remains open for
The increase in intake temperature of internal combustion engines will __________ efficiency.
The pressure at the end of compression, in petrol engines, is approximately
The size of a reactor at which the chain reaction can be initiated (i.e. when system becomes critical) with just enough fissionable material (called critical mass of fuel) is known as critical size of reactor.
The turbine of the turbo-prop engine is __________ that of the turbo-jet engine.
The knocking tendency in spark ignition engines may be decreased by
The colour of exhaust from diesel engine is generally
Morse test is used to determine the I.P. of a
The control rods in the control system of nuclear reactors are used to
In a four stroke cycle petrol engine, the expansion
The running cost of a petrol engine is __________ than that of a diesel engine.
In natural uranium, the constituents of three naturally occuring isotopes are
The cylinder of a gas engine is made __________ than that of the petrol engine.
A supercharged engine as compared to an ordinary engine
In petrol engines, using a fixed octane rating fuel, the increase in compression ratio will not effect the knocking tendency.
The first nuclear power plant in India was located at