Mechanical Engineering Questions And Answers :: Thermodynamics: part5



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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