How many times in a minute does each valve on a four stroke engine running at 2000 RPM open and close? How many times in a minute does each valve on a four stroke engine running at 2000 RPM open and close? mcq is given below:

Q. How many times in a minute does each valve on a four stroke engine running at 2000 RPM open and close?

(a) 1000
(b) 2000
(c) 4000
(d) 6000

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Ans:  (a) 1000

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