engineering recuitment BHEL Engineer Trainee Mock Test 2025 Internal Combustion Engine Knocking and Detonation
Which of the following increase the diesel knocking tendency?
1. Decreased compression ratio
2. Decreased engine speed
3. Retarded injection timing
4. Supercharging
1
1 only
2
2 only
3
2 and 3
4
3 and 4