At what value of crank angle (roughly), no flow of water from or into the air vessel takes place in case of a double acting reciprocating pump ?

At what value of crank angle (roughly), no flow of water from or into

1.	At what value of crank angle (roughly), no flow of water from or into the air vessel takes place in case of a double acting reciprocating pump ?
A.	40¬∞ and 140¬∞
B.	45¬∞ and 60¬∞
C.	90¬∞ and 80¬∞
D.	20¬∞ and 120¬∞
Answer» B. 45¬∞ and 60¬∞

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At what value of crank angle (roughly), no flow of water from or into the air vessel takes place in case of a double acting reciprocating pump ?

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