For double acting reciprocating pump, there will be no flow into or from the air valve, when the crank angle is:

For double acting reciprocating pump, there will be no flow into or fr

1.	For double acting reciprocating pump, there will be no flow into or from the air valve, when the crank angle is:
A.	39° 32' and 140° 28'
B.	39° 32 to 140° 28'
C.	0° to 39° 32'
D.	18° 34' to 161° 26'
Answer» B. 39° 32 to 140° 28'