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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