Which of the following factors increase detonation in the SI engine? 1. Increase spark advance. 2. Increased speed. 3. Increased air-fuel ratio beyond stoichiometric strength. 4. Increased compression ratio. Select the correct answer using the codes given below: Codes:

Which of the following factors increase detonation in the SI engine? 1

1.	Which of the following factors increase detonation in the SI engine? 1. Increase spark advance. 2. Increased speed. 3. Increased air-fuel ratio beyond stoichiometric strength. 4. Increased compression ratio. Select the correct answer using the codes given below: Codes:
A.	1 and 3
B.	2 and 4
C.	1, 2 and 4
D.	1 and 4
Answer» E.

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Which of the following factors increase detonation in the SI engine? 1. Increase spark advance. 2. Increased speed. 3. Increased air-fuel ratio beyond stoichiometric strength. 4. Increased compression ratio. Select the correct answer using the codes given below: Codes:

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