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Thermodynamics Practice Test: Vapour Power Cycles
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Vapour Power Cycles topics include: Rankine cycle, vapour cycle process, feedwater heaters, binary vapour cycles, coupled cycles and steam power plant. A vapor power cycle is a thermodynamic cycle that uses a working fluid in a vapor state to drive a turbine. The fluid will undergo a phase change, going from a liquid phase, vapor phase, or both.  Vapor power cycles are the most common basis for electricity generation in large fixed plant operations. They were one of the first developed for steam engines and have been adapted to many applications.  There are five steam power cycles: The... Show more
Thermodynamics Practice Test: Vapour Power Cycles
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25 Questions

1. The work ratio is defined as the ratio of
2. The thermal efficiency of the cycle is
3. In the vapour power cycle, working fluid undergoes a change of phase.
4. With the use of reheat,
5. The correct sequence of expansion in a reheat cycle is
6. The efficiency of a binary cycle is given by(here E=efficiency)
7. For n cycles, overall efficiency would be
8. The heating of feedwater by steam bled from the turbine, carnotizes the Rankine cycle.
9. The fluid should be chemically ____ and ____ contaminate the material of construction.
10. Why should the reheat pressure be optimized?
11. The working fluid should have ____ critical temperature.
12. Which of the following statement is true?
13. At the heat rejection temperature of 40 degree Celsius, the saturation pressure of steam is 0.075 bar.
14. We can get a tertiary cycle if a sulphur dioxide cycle is added to mercury-steam cycle.
15. The efficiency of regenerative cycle will be ____ the efficiency of the Rankine cycle.
16. By combining two cycles in series, we can get high combined efficiency even if the individual efficiencies are low.
17. Heat loss from turbine is generally neglected.
18. Which of the following losses occur in a cycle?
19. The specific heat of the working fluid should be ____
20. Which of the following fluid can be used in place of water?
21. The efficiency of Rankine cycle is given by
22. The condenser losses include
23. The freezing point of fluid should be ____ room temperature.
24. Why is mercury unsuitable at low temperatures?
25. The saturation pressure at heat rejection temperature should be ____ atmospheric pressure.