Mechanical Engineering : Thermodynamics QUESTIONS AND ANSWERS :: part4 : 16 to 20
Following Mechanical Engineering Multiple choice objective type questions and answers will help you in BSNL JTO, GATE 2024 and IES 2024 examinations :
16.For reversible adiabatic process, change in entropy is |
| maximum |
| minimum |
| zero |
| unpredictable |
| negative. |
17.Entropy change depends on |
| heat transfer |
| mass transfer |
| change of temperature |
| thermodynamic state |
| change of pressure and volume. |
18.The more effective way of increasing efficiency of Carnot engine is to |
| increase higher temperature |
| decrease higher temperature |
| increase lower temperature |
| decrease lower temperature |
| keep lower temperature constant. |
19.In an isothermal process, the internal energy |
| increases |
| decreases |
| remains constant |
| first increases and then decreases |
| first decreases and then increases. |
20.If a fluid expands suddenly into vacuum through an orifice of large dimension, then such a process is called |
| free expansion |
| hyperbolic expansion |
| adiabatic expansion |
| parabolic expansion |
| throttling. |
More Thermodynamics QUESTIONS AND ANSWERS available in next pages
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