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What is the use of the Spring ball valve in a gear pump?

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in Automotive Engine Design by (137k points)
What is the use of the Spring ball valve in a gear pump?

(a) To know the temperature

(b) To cutoff the rotation of the gears

(c) To know the pressure level

(d) None of the mentioned

I have been asked this question in exam.

Question is from Lubrication and Lubricants topic in portion Lubrication and Lubricants of Automotive Engine Design

1 Answer

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Best answer
Correct choice is (c) To know the pressure level

The best explanation: When the pressure exceeds the prescribed value, the spring is compressed and the ball is lifted off its seat and the oil passes back to the inlet side through the bypass provided.

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