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When an air cleaner gets clogged with dirt. How are the airflow,Engine performance, and fuel consumption respectively?

(a) Increase, sluggish, lower

(b) Decrease, sluggish,higher

(c) Increase, better, lower

(d) Has no effect

The question was asked during a job interview.

This interesting question is from Petrol Engine Fuel Supply System topic in division Petrol Engine Fuel Supply System of Automotive Engine Design

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Right choice is (b) Decrease, sluggish,higher

The explanation: When the air cleaner gets clogged the airflow gets decreased, resulting in sluggish engine performance and higher consumption of fuel. Therefore, it should be cleaned regularly or replaced periodically for every 20,000kms.

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