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ESE 2019: Thermodynamics Quiz-3

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Question 1

A: A Reversible process is the most efficient thermodynamic process.
R: The work and heat interactions are equal for forward and reverse processes.

Question 2

A: All the work cannot be transferred as heat, but all the heat can be converted to work.
R: First law and second law suggest that all heat cannot be converted to work but all work can be converted to heat.

Question 3

A: COP of a refrigerator can be increased by using multistage compression.
R: Multistage compression reduces work of compression required.

Question 4

In, Pressurized Fluidized Bed Combustion System, high cycle efficiency is achieved by:
i. Carrnot Cycle
ii. Rankine Cycle
iii. Brayton Cycle

Question 5

In MHD generator, which among the following electrodes are connected to external circuit to get the load output?
i. SiC
ii. ZrB₂
iii. LaB₂
iv. MOSi₂

Question 6

Consider the following statements in respect of an evaporative cooling process :
1) The wet-bulb temperature remains constant.
2) The dew-point temperature remains constant.
3) The enthalpy remains constant.
Which of the above statements are correct?

Question 7

The Carnot cycle is impracticable because :

Question 8

Direction: Each of the question consist of two statements, one labeled as the ‘Statement (I)’ and the other as ‘Statement (II)’. Examine these two statements carefully and select the answer to these items using the codes given below:

Statement (I): In a choked flow in a convergent divergent nozzle, flow in the diverging section is supersonic.
Statement (II): In a choked flow in a convergent divergent nozzle, the Mach number at the throat is larger than one.

Question 9

In two stroke engines, the crankcase which is a pressurization chamber will force_________in the cylinder.

Question 10

Morse test is used in multi-cylinder I . C . engine to find

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ESE & GATE ME Thermodynamics

Dec 6ESE & GATE ME