Q. A simple Brayton cycle uses Helium as the working fluid, has a maximum temperature of 1000 K, and a pressure ratio of 4. At the start of the compression, the Helium pressure and temperature are 50 kPa and 250 K. Based upon cold-air standard analysis assumptions, the thermal efficiency of the cycle is?

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Q. A simple Brayton cycle has a pressure ratio of 5 and a maximum temperature of 900 K. Air enters the compressor at 100 kPa, 300 K. Based upon cold-air standard analysis assumptions, the back-work ratio of this cycle is?

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Q. Which of the following methods can be used to increase efficiency of a Brayton cycle?

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Q. For the same maximum pressure and heat input, the most efficient cycle is?

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Q. The compression ratio is the ratio of ____________

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Q. A Sterling engine uses an energy source whose temperature is 727°C and an energy sink whose temperature is 27°C. How much heat must be added to the engine to produce 1 unit of work?

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Q. Which of the following is not a component of Brayton cycle?

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Q. For a given value of mean temperature of heat addition(Tm) is?

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Q. Mean temperature of heat addition can be increased by?

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Q. Internal irreversibility of Rankine cycle is caused by?

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Q. Which of the following statement is true?

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Q. Pulverized coal is ____________

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Q. What is caking in Power Plants?

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Q. Water gas is a mixture of ___________

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Q. Critical pressure of water is ___________

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Q. Coal used in power plant is also known as ___________

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Q. The temperature to which air must be cooled in order to become saturated is the ___________

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Q. Mean Temperature of Heat Addition is the ratio of ____________

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Q. If T₂ is the temperature of heat rejection, Tml is the mean temperature of heat addition, the efficiency n of a Rankine Cycle is given by which of the expressions?

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Q. The saturation pressure corresponding to the minimum practicable temperature of heat rejection is a function of?

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