Mechanical Engineering - Thermodynamics

46. 

The sum of internal energy (U) and the product of pressure and volume (p.v) is known as

A. workdone
B. entropy
C. enthalpy
D. none of these

Answer: Option C

Explanation:

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47. 

The value of 1 mm of Hg is equal to

A. 1.333 N/m2
B. 13.33 N/m2
C. 133.3 N/m2
D. 1333 N/m2

Answer: Option C

Explanation:

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48. 

One kg of carbon requires 4/3 kg of oxygen and produces __________ kg of carbon monoxide gas.

A. 8/3
B. 11/3
C. 11/7
D. 7/3

Answer: Option D

Explanation:

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49. 

The behaviour of a perfect gas, undergoing any change in the variables which control physical properties, is governed by

A. Boyle's law
B. Charles' law
C. Gay-Lussac law
D. all of these

Answer: Option D

Explanation:

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50. 

The universal gas constant of a gas is the product of molecular mass of the gas and the gas constant.

A. Correct
B. Incorrect

Answer: Option A

Explanation:

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