A fuel will detonate less if it has higher self ignition temperature.
Enriched uranium is required as a fuel in a nuclear reactor, if light water is used as moderator and coolant, because light water has
The fuel valve in a four stroke cycle diesel engine
The spark ignition engines are governed by
The two reference fuels used for cetane rating are
In petrol engines, the delay period is of the order of
In order to mix air and petrol in the required proportion and to supply it to the engine during suction stroke, then __________ is employed.
Number of working strokes per min. for a two stroke cycle engine are __________ the speed of the engine in r.p.m.
In a four stroke engine, the working cycle is completed in
The reflectivity depends upon
The sparking in a petrol engine increases pressure and temperature of the products of combustion, but the volume remains constant.
A higher compression ratio causes
In a two stroke engine, the working cycle is completed in two revolutions of the crankshaft.
A fuel of an octane number rating ofmatches in knocking intensity as a mixture of
In a petrol engine, if diesel is used, then the engine will
Stoichiometric ratio is
The thermal efficiency of a petrol engine is __________ as compared to diesel engine.
Supercharging is the process of supplying the intake air to the engine cylinder at a density __________ the density of the surrounding atmosphere.
The probability of knocking in diesel engines is increased by
The combustion in compression ignition engines is
As compared to air standard cycle, in actual working, the effect of variation in specific heats is to
In petrol engines, advancing of the spark timing will __________ the knocking tendency.
If petrol is used in a diesel engine, then
The reflectivity of a reflector is defined as the fraction of neutrons entering the reflector which are returned to the core.
The injector nozzle of a compression ignition engine is required to inject fuel at a sufficiently high pressure in order to
If the fuel is rich in fissionable material, the reactor can be made more compact than if the percentage of fissionable atoms is small.
A gas engine has a swept volume ofcm3 and clearance volume ofcm3. Its volumetric efficiency is 0.and mechanical efficiency is 0.The volume of the mixture taken in per stroke is
Which of the following statement is correct ?
A reactor capable of converting a fertile material into fissile isotopes is called regenerative reactor.
A two stroke cycle engine gives __________ the number of power strokes as compared to the four stroke cycle engine, at the same engine speed.
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