Which one of the following thermodynamic processes approximates the steaming of food ina pressure cooker ?
Ice kept in a well insulated thermo flask is an example of which system ?
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For a simple closed system of constant composition, the difference between the net heat and work interactions is identifiable as the change in
Assertion (A) : Thermodynamic work is path–
dependent except for an adiabatic process.
Reason (R) : It is always possible to take a
system from a given initial state to any final state
by performing adiabatic work only.
Which one of the following is correct ?
The cyclic integral of (dQ –dW) for a process is
The variables which control the physical properties of a perfect gas are
In a vapour compression refrigeration system, throttle valve is used in place of an expander because
In a 3 ton capacity water cooler, water enters at 30ºC and leaves at 15ºC steadily. What is the water flow rate per hour ?
The correct sequence of the given components of a vapour compression refrigerator is
Where is an air refrigeration cycle generally employed ?
Which gas power cycle consist of four processes during which work alone is transferred during which work alone is transferred during two processes and heat alone is transferred during the other two processes ?
Divided chamber diesel engines use lower injection pressure compared to open chamberengines because
The discharge of hydrocarbons from petrol automobile exhaust is minimum when the vehicle is
Which one of the following fuels can be obtained by fermentation of vegetable matter ?
Which one of the following automobile exhaust gas pollutants is a major cause of photochemical smog ?
When a hydrocarbon fuel burns is excess air orsat analysis of products of combustion will show
Of all power plants, hydel is more disadvantageous when one compares the
In thermal power plants, the deaerator is used mainly to
The degree of reaction of a turbine is defined as the ratio of
The expression for the maximum efficiency of a Parson's turbine is (a is the angle made by
absolute velocity at inlet)
With natural uranium, which of the following is used as moderator ?
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5 videos|103 docs|59 tests
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