A 2 in. sch 40 pipe carries SAE 10 lube oil at 1008F (SG ¼ 0:928). The flow rate may be as high as 55 gpm, and you must select an orifice meter to measure the flow. (a) What size orifice should be...

A 2 in. sch 40 pipe carries SAE 10 lube oil at 1008F (SG ¼ 0:928). The flow rate may be as high as 55 gpm, and you must select an orifice meter to measure the flow.

(a) What size orifice should be used if the pressure difference is measured using a DP cell having a full scale range of 100 in.H2O?

(b) Using this size orifice, what is the flow rate of oil, in gpm, when the DP cell reads 50 in.H2O of water?