Basic Mechanical Engineering (3110006) MCQs

MCQs of Introduction

Showing 31 to 38 out of 38 Questions
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31.
In a compressor, the work done is 200kJ and heat rejected to the surrounding is 50kJ. The change in internal energyΔU is
(a) 150 kJ
(b) 250 kJ
(c) 4 kJ
(d) 10000 kJ
Answer:

Option (b)

32.
The phase change from solid to vapour is called
(a) sublimation
(b) vaporization
(c) pressurization
(d) temperature
Answer:

Option (a)

33.
The process of sublimation is found to occur in
(a) Liquid N2
(b) Solid CO2
(c) Solid O2
(d) Air
Answer:

Option (b)

34.
Critical point is the temperature above which
(a) when solid is converted to liquid
(b) when the liquid is converted to vapour
(c) when only one phase is existing
(d) none of these
Answer:

Option (c)

35.
Which one is correct?
(a) The change of property depends on the path followed
(b) The change of property is fixed by the end states and is independent of the path followed
(c) The change of the property is not fixed by the end state
(d) The change of property is not a property of the thermodynamic system
Answer:

Option (b)

36.
Zeroth law of thermodynamics forms the basis of measurement of the following.
(a) Heat exchange
(b) Work
(c) Pressure
(d) Temperature
Answer:

Option (d)

37.
The statement that when any two bodies are in thermal equilibrium with third, they are also in thermal equilibrium with each other is
(a) The first law of thermodynamic
(b) The zeroth law of thermodynamic
(c) The second law of thermodynamic
(d) none of the above
Answer:

Option (b)

38.
The first law of thermodynamic is the law of
(a) energy conservation
(b) heat transfer
(c) work transfer
(d) all of these
Answer:

Option (a)

Showing 31 to 38 out of 38 Questions
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