A rotameter through which air at room temperature and atmospheric pres – McqOptions

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1.	A rotameter through which air at room temperature and atmospheric pressure is flowing gives a certain reading for a flow rate of 100 cc/sec. If helium (molecular weight 4) is used and rotameter shows the same reading, the flow rate (cc/sec) is
A.	26
B.	42
C.	269
D.	325
Answer» D. 325

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