engineering recuitment BEL Probationary Engineers Mock Test 2025 Internal Combustion Engine Fuels and Combustion Analysis of Exhaust Gases
Which of the following actions will help to reduce the black smoke emission of a diesel engine?
1. Run at lower load, i.e. derating
2. Have regular maintenance of the diesel engine, particularly of injection system
3. Use diesel oil of higher cetane number
Select the correct answer using the code given below.1
1 and 2 only
2
1 and 3 only
3
2 and 3 only
4
1, 2 and 3