Mechanical Engineering - Thermodynamics - Discussion
Discussion Forum : Thermodynamics - Section 1 (Q.No. 43)
43.
When cut-off ratio is __________ the efficiency of Diesel cycle approaches to Otto cycle efficiency.
Discussion:
23 comments Page 1 of 3.
Aditya Chopra said:
4 years ago
Answer should be 1 (cut off=1).
(2)
Vinay said:
5 years ago
Cut off should be zero, and if we talk about cutoffs ratio it should be 1.
(1)
Vishnu said:
8 years ago
The Answer is correct.
Cut off ratio is inversely proportional to efficiency. And when it become zero efficiencies of diesel engine equal to that of a petrol engine.
Cut off ratio is inversely proportional to efficiency. And when it become zero efficiencies of diesel engine equal to that of a petrol engine.
Usama Tayyab said:
5 years ago
Cut off should be zero, and if we talk about cutoffs ratio it should be 1.
Tushar Thakare said:
6 years ago
How the volume can be zero. If not then How the Division of Non zero value can be Zero. It should be 1.
Sarath mohan said:
6 years ago
Cutoff ratio never falls to 0. So, the answer should be 1.
Vijay said:
7 years ago
Cut-off ratio is 1 cut-off 0.
Sai kumar kakaraparthi said:
8 years ago
The cut-off ratio is never be 0.
Vikram koppula said:
8 years ago
Cut off ratio is should be 1. Then only diesel cycle approaches to Otto cycle efficiency. Cut off and cut off ratio both are different.
Manoj Boja said:
8 years ago
Zero is not the right answer.
V2/V1 is the cut off ratio. If it is zero, there is no meaning in it. In diesel cycle heat addition is done in the isobaric process (V2/V1). If that to be changed to isochoric process (V2/V1), it should be 1. Hence it is V1=V2.
V2/V1 is the cut off ratio. If it is zero, there is no meaning in it. In diesel cycle heat addition is done in the isobaric process (V2/V1). If that to be changed to isochoric process (V2/V1), it should be 1. Hence it is V1=V2.
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