Mechanical Engineering - Thermodynamics

41. 

The area under the temperature-entropy curve (i. e. T - s curve) of any thermodynamic process represents the workdone during the process.

A. Agree
B. Disagree

Answer: Option B

Explanation:

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42. 

The heating of a gas at constant pressure is governed by Charles' law.

A. True
B. False

Answer: Option A

Explanation:

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43. 

Which of the following statement is wrong?

A. The closed cycle gas turbine plants are external combustion plants.
B. In the closed cycle gas turbine, the pressure range depends upon the atmospheric pressure.
C. The advantage of efficient internal combustion is eliminated as the closed cycle has an external surface.
D. In open cycle gas turbine, atmosphere acts as a sink and no coolant is required.

Answer: Option B

Explanation:

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44. 

Carnot cycle consists of

A. two constant volume and two isentropic processes
B. two isothermal and two isentropic processes
C. two constant pressure and two isentropic processes
D. one constant volume, one constant pressure and two isentropic processes

Answer: Option B

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45. 

When a gas is heated at constant volume

A. its temperature will increase
B. its pressure will increase
C. both temperature and pressure will increase
D. neither temperature nor pressure will increase

Answer: Option C

Explanation:

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