A small mass of fluid is greatly accelerated in a turbojet e

A small mass of fluid is greatly accelerated in a turbojet engine while in a turbofan engine, a large mass of fluid is slightly accelerated True False Thermal efficiency of a gas turbine plant can be increased by Reheating Intercooling Regeneration All the above Compared to a single-stage turbine plant, a two-stage gas, turbine plant with reheating after the first-stage has Increased back-work ratio Reduced back-work ratio Same back-work ratio None of the above Design variable are the quantities that may be varied in the system in order to satisfy the given requirements True False When the evaporator pressure is reduced without any changes to the condenser pressure, the refrigeration effect and COP are Increased Reduced Not affected None of the above The thermal efficiency of a Rankine cycle can be increased by Increasing the average temperature at which heat is added to the cycle Increasing the average temperature at which heat is rejected from the cycle Decreasing the average temperature at which heat is added to the cycle None of the above TTD of a CFWH (Closed feed water heater) is defined as the difference between the inlet temperature of the extracted steam and the outlet temperature of the feedwater True False

Solution

1.1 a

1.2 d as all the three stated methods tries to increase tge efficiency

1.3 b

1.4 a

1.5 b as the work to raise the compressor increases with decrease in the pressure, tge value of cop reduces

1.6 a as the thermal efficiency increases with the mean temperature of addition