Mechanical Engineering : Thermodynamics QUESTIONS AND ANSWERS :: part5 : 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.During throttling process |
| heat exchange does not take place |
| no work is done by expanding steam |
| there is no change of internal energy of steam |
| all of the above |
| entropy decreases. |
17.A manufacturer claims to have a heat engine capable of developing 20 h.p. by receiving heat input of 400 kcal/mt and working between the temperature limits of 227� C and 27� C. His claim is |
| justified |
| not possible |
| may be possible with lot of sophistica-tions |
| cost will be very high |
| theroretically possible. |
18.If a system after undergoing a series of processes, returns to the initial state then |
| process is thermodynamically in equilibrium |
| process is executed in closed system cycle |
| its entropy will change due to irreversibility |
| sum of heat and work transfer will be zero |
| no work will be done by the system. |
19.Carnot cycle efficiency is maximum when |
| initial temperature is 0�K |
| final temperature is 0�K |
| difference between initial and final temperature is 0�K |
| final temperature is 0�C |
| initial temperature is minimum possible. |
20.I kgf/cm2 is equal to |
| 760 mm Hg |
| zero mm Hg |
| 735.6 mm Hg |
| 1 mm Hg |
| lOOmmHg. |
More Thermodynamics QUESTIONS AND ANSWERS available in next pages
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