1.

Consider the following:1. Catalytic convertor2. Use of high compression ratio3. Oxidation catalyst in the exhaust manifold4. Use of high degree of superchargerBy which of these techniques, can the oxides of nitrogen in the exhaust be controlled?

A. 1 only
B. 2 and 4 only
C. 2, 3 and 4 only
D. 1, 2, 3 and 4
Answer» B. 2 and 4 only


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