Mechanical Engineering - Thermodynamics

26.
The amount of heat generated per kg of fuel is known as
calorific value
heat energy
lower calorific value
higher calorific value
Answer: Option
Explanation:
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27.
Carnot cycle has maximum efficiency for
petrol engine
diesel engine
reversible engine
irreversible engine
Answer: Option
Explanation:
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28.
The entropy may be expressed as a function of
pressure and temperature
temperature and volume
heat and work
all of these
Answer: Option
Explanation:
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29.
It is __________ to construct an engine working on a cyclic process, whose sole purpose is to convert heat energy into work.
possible
impossible
Answer: Option
Explanation:
No answer description is available. Let's discuss.

30.
Which of the following is the correct statement?
All the reversible engines have the same efficiency.
All the reversible and irreversible engines have the same efficiency.
Irreversible engines have maximum efficiency.
All engines are designed as reversible in order to obtain maximum efficiency.
Answer: Option
Explanation:
No answer description is available. Let's discuss.