Related Questions

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
In regenerative cycle feed water is heated by
A exhaust gases
B heaters
C draining steam from the turbine
D all above
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
The maximum percentage gain in Regenerative feed heating cycle thermal efficiency
A increases with number of feed heaters increasing
B decreases with number of feed heaters increasing
C remains same unaffected by number of feed heaters
D none of the above
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
A regenerative steam cycle renders
A Increased work output per unit mass of steam
B Decreased work output per unit mass of steam
C Increased thermal efficiency
D Decreased work output per unit mass of steam as well as increased thermal efficiency
Pressure-enthalpy chart is useful in refrigeration. The change in internal energy of an ideal fluid used in ideal refrigeration cycle is
A Positive
B Negative
C Zero
D Infinity
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
Regenerative feedback implies feedback with
A Oscillations
B Step input
C Negative sign
D Positive sign
In regenerative air preheaters, the heat is transferred
A From a metal wall from one medium to another
B From heating an intermediate material and then heating the air from this material
C By direct mixing
D Heat is transferred by bleeding some gas from furnace

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