In a steam engine, the distance by which the outer edge of the D-slide valve overlaps the steam port is called?

In a steam engine, the distance by which the outer edge of the D-slide

1.	In a steam engine, the distance by which the outer edge of the D-slide valve overlaps the steam port is called?
A.	Lead
B.	Steam lap
C.	Exhaust lap
D.	None of these
Answer» C. Exhaust lap

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In a steam engine, the distance by which the outer edge of the D-slide valve overlaps the steam port is called?

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