Mechanical Engineering - Thermodynamics - Discussion

Discussion Forum : Thermodynamics - Section 5 (Q.No. 30)
30.
Which of the following is the correct statement?
All the reversible engines have the same efficiency.
All the reversible and irreversible engines have the same efficiency.
Irreversible engines have maximum efficiency.
All engines are designed as reversible in order to obtain maximum efficiency.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
Discussion:
36 comments Page 2 of 4.

Kumar said:   6 years ago
Option A is correct answer

Mukesh said:   6 years ago
D is correct option and A is incorrect because Otto cycle, diesel cycle, all are reversible but they have less efficiency then carnot cycle and also stirling and Ericsson cycle have equal efficiency to that of carnot cycle when regenerative is used.

Fasil said:   6 years ago
The reversible engine follows the carnot cycle. So it has max Efficiency.

Manish ambesh said:   7 years ago
Answer A is right. All reversible engine working under a same temperature maximum efficiency.

Sandeep Kumar Yadav said:   7 years ago
I think option A is the right answer.

Manoj said:   8 years ago
@ALL.

There is no any engine based on the reversible cycle.

The Reversible cycle is there but no reversible engine is there.

Srinivasulu said:   8 years ago
What are reversible and irreversible engine?

Ankit Korde said:   8 years ago
I think there is difference between engine and cycle.

As Otto cycle has maximum efficiency than Diesel cycle but efficiency of petrol engine is less than Diesel engine.

So reversible cycle has maximum efficiency but reversible engine has less efficiency than irreversible engine. So answer is C.

Anand singh said:   8 years ago
Correct answer is (A) Because always revertible engines are more efficient then irreversible engines.

Om Nagar said:   8 years ago
I agree @Ram Mohan.


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