Mechanical Engineering - Thermodynamics
Exercise :: Thermodynamics - Section 5
| 26. |
The amount of heat generated per kg of fuel is known as |
| A. |
calorific value | | B. |
heat energy | | C. |
lower calorific value | | D. |
higher calorific value |
Answer: Option A
Explanation:
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| 27. |
Carnot cycle has maximum efficiency for |
| A. |
petrol engine | | B. |
diesel engine | | C. |
reversible engine | | D. |
irreversible engine |
Answer: Option C
Explanation:
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| 28. |
The entropy may be expressed as a function of |
| A. |
pressure and temperature | | B. |
temperature and volume | | C. |
heat and work | | D. |
all of these |
Answer: Option A
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. |
Answer: Option B
Explanation:
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| 30. |
Which of the following is the correct statement? |
| A. |
All the reversible engines have the same efficiency. | | B. |
All the reversible and irreversible engines have the same efficiency. | | C. |
Irreversible engines have maximum efficiency. | | D. |
All engines are designed as reversible in order to obtain maximum efficiency. |
Answer: Option C
Explanation:
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