The specific gravity of gasoline is approximately .70?

Question

estimate the average mass flowrate (lb/min)delivered by a gasoline pump?

Answer 1

Let:

Q = flow rate in gal/min

D = density of gasoline in lbs/gal

W = flow rate in weight units/minute

M = flow rate in mass units/minute

D = sp.gr. x 62.4/7.48 = 0.7 x 62.4/7.48 = 5.8396 lbs/gal

Note:

62.4 is the density of water in lbs/cu.ft

sp.gr. which is specific gravity, is the ratio of the density of the substance divided by the density of water = 0.7

7.48 is the number of gallons per cubic ft

W = DxQ = 5.8396Q in lbs(weight)/min

M = (5.8396/32.2)Q = 0.18135Q lbs(mass)/min

You have to specify the flow rate of the pump in gal/min to get the numeric values of the weight and mass flow rates.