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This is an MCQ-based quiz on the topic of Vapour Power Cycles
This includes the following:-
Simple Steam Power Cycle and Rankine Cycle
Actual Vapor Cycle Processes
Mean Temperature of Heat Addition and Reheat Cycle
Ideal Regenerative Cycle and Regenerative Cycle
Reheat-Regenerative Cycle and Feedwater Heaters
Characteristics of an Ideal Working Fluid in Vapor Power Cycles
Binary Vapor Cycles
Thermodynamics of Coupled Cycles
Efficiencies in Steam Power Plant
The correct sequence of expansion in a reheat cycle is
To fix the maximum steam pressure at the inlet of turbine we need to first fix
The maximum steam temperature at turbine inlet
Minimum temperature of heat rejection
The minimum quality of steam at turbine exhaust
All of the mentioned
If we ____ the superheat at constant pressure then the cycle efficiency ____
Decrease, increases
Increase, decreases
Increase, increases
Decrease, decreases
The efficiency of Rankine cycle is given by
1 – (Q1/Q2)
1 – (Tmean/T2)
1 – (T2/Tmean)
None of the mentioned
In the Rankine cycle, heat is added reversibly at
Constant pressure and constant temperature
Constant pressure and infinite temperature
Infinite pressure and constant temperature
Infinite pressure and infinite temperature
Work output of turbine is ____ the work input to the pump.
Much larger
Much smaller
Equal to
None of the mentioned
Heat rate is given by (in kJ/kWh)
Cycle efficiency
3600 / cycle efficiency
Cycle efficiency / 3600
Cycle efficiency * 3600
Steam rate is the rate of steam flow required to produce unit shaft output.
True
False
The work ratio is defined as the ratio of
Positive work output to net work output
Net work output to positive work output
Heat input to work output
None of the mentioned
The liquid water handled by pump is
Incompressible
With increase in pressure, there is a little change in density or specific volume
Both of the mentioned
None of the mentioned
For a Rankine cycle, which of the following is true?
A reversible constant pressure heating process happens in steam boiler
Reversible adiabatic expansion of steam in turbine
Reversible constant pressure heat rejection in condenser
All of the mentioned
In a Rankine cycle, all the processes are ideal.
True
False
For a vapour power cycle,
Net heat input is converted into net work output
Q1-Q2 = Wt-Wp
Efficiency = 1 – (Q2/Q1)
All of the mentioned
For a fluid undergoing cycle process,
There is no net change in its internal energy
Energy transfer as heat is equal to the energy transfer as work
Both of the mentioned
None of the mentioned
The path followed in a vapour power cycle is
Boiler-condenser-turbine-pump
Boiler-turbine-condenser-pump
Boiler-turbine-pump-condenser
Boiler-pump-turbine-condenser
In the vapour power cycle, working fluid undergoes a change of phase.
True
False
A power cycle continuously converts ____ into ____
Heat, heat
Work, heat
Heat, work
Work, work
