Mechanical Engineering - Thermodynamics

36. 

The standard value of atmospheric pressure taken at sea level is

A. 1.013 bar
B. 760 mm of Hg
C. 1013 x 102 N/m2
D. all of these

Answer: Option D

Explanation:

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37. 

The efficiency of Otto cycle depends upon the specific heats of the working substance.

A. Yes
B. No

Answer: Option B

Explanation:

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38. 

The smallest quantity of a substance, which can exist by itself in a chemically recognizable form is known as

A. element
B. compound
C. atom
D. molecule

Answer: Option D

Explanation:

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39. 

The absolute zero pressure can be attained at a temperature of

A. 0°C
B. 273°C
C. 273 K
D. none of these

Answer: Option D

Explanation:

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40. 

One kg of ethylene (C2H4) requires 2 kg of oxygen and produces 22/7 kg of carbon dioxide and __________ kg of water or steam.

A. 9/7
B. 11/7
C. 7/4
D. 11/4

Answer: Option A

Explanation:

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