Mechanical Engineering - IC Engines and Nuclear Power Plants - Discussion

Discussion Forum : IC Engines and Nuclear Power Plants - Section 5 (Q.No. 7)
7.
The fuels in order of decreasing knock tendency for spark ignition engines are
paraffins, aromatics, napthenes
paraffins, napthenes, aromatics
napthenes, aromatics, paraffins
napthenes, paraffins, aromatics
Answer: Option
Explanation:
No answer description is available. Let's discuss.
Discussion:
6 comments Page 1 of 1.

Svt said:   5 years ago
I think the answer is right because of the octane number of aromatics >napthenes > paraffins. So, knocking tendency of paraffins > naphthenes >aromatics.

Vinay said:   5 years ago
For SI engine antiknock characteristics.

Aromatics > Napthene > Parafins.

And For CI engine order just reverses.

Panchal vaibhav said:   6 years ago
A is the correct answer.

Ref: R S Khurmi.

Saharsh Khandelwal said:   7 years ago
Can anyone explain to me which order is correct?

Rahul Gupta said:   7 years ago
B is wrong. It is the position of increasing.

M S NAYAK said:   8 years ago
I think B is wrong can anybody please explain it.

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