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
Answer: Option D
Related Questions on Air Pollution and its Control in Automobile
What is the purpose of crank case ventilation?
A. To prevent pressure build up
B. To prevent temperature build up
C. To increase the blow by gas
D. To reduce the combustion leak
A. Exhaust system and intake system
B. Crank case and intake system
C. Crank case and exhaust system
D. Exhaust system and catalytic converter
In a petrol fuel injected engine, the air and fuel are mixed in the
A. Throttle body
B. Intake manifold chamber
C. Intake ports
D. Combustion chambers
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