SSC JE Mechanical Engineering 23rd Jan 2018 Shift-2
For the following questions answer them individually
If a Carnot refrigerator has a COP of 6. What is the ratio of the lower to the higher absolute temperature?
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.
What is the ratio W/Q (W= work transfer from cycle, Q = heat transfer to the cycle) known as?
What is the temperature at which a system goes under a reversible isothermal process without heat transfer?
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?
