SSC JE Mechanical Engineering 23rd Jan 2018 Shift-2
For the following questions answer them individually
For a pure substance in gaseous phase to be liquefied, the gas has to undergo initial cooling below the ________.
What is the CORRECT order of decrease in entropy?
(a) solid phase
(b) Liquid phase
(c) Gaseous phase
The entropy always increases for an isolated system and when the equilibrium is reached, it is ________.
A Carnot engine operates between T1 and T2. If there is an increase in source temperature by t and a decrease in sink temperature by t. How is the efficiency in both cases is related?
In a surrounding, the amount of irreversibility of a process undergone by a system is determined by ________.
In an Otto cycle, r is the compression ratio and $$ \gamma $$ is the adiabatic index.Which relation defines the air standard efficiency?
For the same operating maximum pressure and temperature, which cycle will have the highest efficiency?
What is the state at which phase change occurs without a change in pressure and temperature is known as?
What value of the dryness fraction (in %) represents the dry saturated state of vapour?
