Q87
Oxides of nitrogen in Petrol engine exhaust can be reduced by the following methods: 1. Use of 5% lean mixture 2. Advancing the spark timing 3. Recirculating a fraction of exhaust gas 4. Using an oxidation catalyst in the exhaust manifold Which of the above statements is/are correct?
A.
1 and 2
B.
2 only
C.
3 and 4
D.
3 only
AnswerAnswer: Option D
Solution
Answer: Option D
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