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To increase which of the following the cleaning element is corrugated and exposed to the incoming air?

(a) Temperature

(b) Pressure

(c) Surface area

(d) Force

I got this question in semester exam.

Origin of the question is Petrol Engine Fuel Supply System topic in section Petrol Engine Fuel Supply System of Automotive Engine Design

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Best answer
Right choice is (c) Surface area

Best explanation: The element is corrugated to increase the surface area exposed to the incoming air so that the resistance offered by the cleaner is reduced to a minimum. Sides of the element are sealed against dust. The air passes through the element and any dust contained is left outside.

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