SSC JE Mechanical Engineering 23rd Jan 2018 Shift-2

Instructions

For the following questions answer them individually

SSC JE Mechanical Engineering 23rd Jan 2018 Shift-2 - Question 141


Which factor contributes to the efficiency of the Otto cycle?

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SSC JE Mechanical Engineering 23rd Jan 2018 Shift-2 - Question 142


If a Carnot refrigerator has a COP of 6. What is the ratio of the lower to the higher absolute temperature?

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SSC JE Mechanical Engineering 23rd Jan 2018 Shift-2 - Question 143


Which of the below stated are properties of a PMM-2?
(1) When net work is equal to the heat absorbed and work efficiency is 100%.
(2) Heat is exchanged from one heat reservoir only.
(3) It violates Kelvin-Planck statement.
(4) It is a hypothktical machine.

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SSC JE Mechanical Engineering 23rd Jan 2018 Shift-2 - Question 144


Tonnes of refrigeration mean ________.

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SSC JE Mechanical Engineering 23rd Jan 2018 Shift-2 - Question 145


What is the ratio W/Q (W= work transfer from cycle, Q = heat transfer to the cycle) known as?

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SSC JE Mechanical Engineering 23rd Jan 2018 Shift-2 - Question 146


What processes does Carnot cycle consist of?

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SSC JE Mechanical Engineering 23rd Jan 2018 Shift-2 - Question 147


What is the temperature at which a system goes under a reversible isothermal process without heat transfer?

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SSC JE Mechanical Engineering 23rd Jan 2018 Shift-2 - Question 148


How is the thermal efficiency of an I.C engine related to compression ratio?

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SSC JE Mechanical Engineering 23rd Jan 2018 Shift-2 - Question 149


All the processes in an air standard cycle are assumed to be ________.

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SSC JE Mechanical Engineering 23rd Jan 2018 Shift-2 - Question 150


Water flows through a turbine in which due to friction there is a temperature rise from $$30^\circ C$$ to $$35^\circ C$$. If there is no heat transfer taking place during the process. What is the change in the entropy of water?

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