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How much more is the efficiency of the Rotor pump when compared to the gear type?

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in Automotive Engine Design by (137k points)
How much more is the efficiency of the Rotor pump when compared to the gear type?

(a) 5%

(b) 10%

(c) 20%

(d) 25%

The question was asked in an internship interview.

This intriguing question comes from Lubrication and Lubricants topic in portion Lubrication and Lubricants of Automotive Engine Design

1 Answer

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Best answer
Correct option is (d) 25%

Explanation: The Rotor type pump is about 25% more efficient and compact than the gear type pump. So, they are used very widely in automobiles.

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