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

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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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