Related Questions

In a regenerative feed heating cycle, the optimum value of the fraction of steam extracted for feed heating
A Decreases with increase in Rankine cycle efficiency
B Increases with increase in Rankine cycle efficiency
C Is unaffected by increase in Rankine cycle efficiency
D None of the above
In a regenerative feed heating cycle, the greatest economy is affected
A when steam is extracted from only one suitable point of steam turbine
B when steam is extracted from several places in different stages of steam turbine
C when steam is extracted only from the last stage of steam turbine
D when steam is extracted only from the first stage of steam turbine
Regenerative cycle thermal efficiency
A is always greater than simple Rankine thermal efficiency
B is greater than simple Rankine cycle thermal efficiency only when steam is bled at particu-lar pressure
C is same as simple Rankine cycle thermal efficiency
D is always less than simple Rankine cycle thermal efficiency
On moving the feed line (q-line) from saturated liquid feed (vertical position) to saturated vapor feed (horizontal feed), if the slope of both the operating lines are to be increased, then it will result in
A Greater degree of separation with a fixed number of trays
B Increased reboiler load
C Increased reflux ratio
D None of these
In regenerative cycle feed water is heated by
A exhaust gases
B heaters
C draining steam from the turbine
D all above
Otto cycle efficiency is higher than Diesel cycle efficiency for the same compression ratio and heat input because in Otto cycle
A Heat rejection is lower
B Expansion and compression are isentropic
C Combustion is at constant volume
D Maximum temperature is higher
In regenerative air preheater (as practised in heating of coke ovens), the heat is transferred
A Through a metallic wall
B By direct contact of hot flue gas with air
C By heating an intermediate material (like chequor bricks) and then heating the air from this hot material
D None of these
The process of draining steam from the turbine, at certain points during its expansion and using this steam for heating the feed water in feed water heaters and then supplying it to the boiler is known as
A Regenerative heating
B Reheating of steam
C Bleeding
D None of these
Thermal efficiency of a two stroke cycle engine is _________ a four stroke cycle engine.
A Equal to
B Less than
C Greater than
D None of these
Thermal conductivity based continuous flue gas analyser makes use of varying thermal conductivity of the constituents of flue gases. Which of the following constituents of flue gases has the maximum thermal conductivity?
A CO2
B N2
C O2
D CO

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