Oxides of nitrogen in the engines exhaust can be reduced by the following methods:
1. Decrease in compression ratio
2. Exhaust gas recirculation
3. Use of 5% lean mixture
4. Use of oxidation catalysts in exhaust manifold.
The correct methods are
A. 1 and 2
B. 1 and 3
C. 1, 2 and 4
D. 2, 3 and 4
Answer: Option A
This Question Belongs to Automobile Engineering >> Air Pollution And Its Control In Automobile
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