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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. If n heaters are used, the greatest gain in efficiency occurs when overall temperature rise is ____ times the difference between condenser and boiler saturation temperatures.
2. Why is superheat desired?
3. The fluid should be chemically ____ and ____ contaminate the material of construction.
4. Which of the following is an assumption for heaters?
5. In a binary cycle, ____ cycles with ____ working fluid are coupled.
6. The efficiency of an ideal regenerative cycle is given by
7. Which of the following statement is true?
8. The maximum temperature of steam that can be used is not fixed.
9. When mercury cycle is added to the steam cycle,
10. Steam rate is the rate of steam flow required to produce unit shaft output.
11. The important piping losses include
12. Which of the following is true about a reheat cycle?
13. The only process which is different in Carnot and Rankine cycle is
14. At the heat rejection temperature of 40 degree Celsius, the saturation pressure of steam is 0.075 bar.
15. The mean temperature of heat addition can be increased by
16. A power cycle continuously converts ____ into ____
17. The temperature of feedwater leaving a heater is ____ the saturation temperature at steam extraction pressure.
18. The efficiency of an ideal regenerative cycle is ____ the Carnot cycle efficiency.
19. The ideal regenerative cycle is not practicable because
20. In a Rankine cycle, all the processes are ideal.
21. Which of the following statement is true?
22. The main losses in turbine include
23. Why both reheating and regeneration is used together?
24. The brake efficiency is given by
25. The fluid should not be toxic, corrosive or excessively viscous.