A 2 in. sch 40 pipe carries a $35^{\circ} \mathrm{API}$ distillate at $50^{\circ} \mathrm{F}(\mathrm{SG}=0.85)$. The flow rate is measured by an orifice meter, which has a diameter of $1.5 \mathrm{in}$. The pressure drop across the orifice plate is measured by a water manometer connected to flange taps.

(a) If the manometer reading is 1 in., what is the flow rate of the oil in gpm?

(b) What would the diameter of the throat of a venturi meter be that would give the same manometer reading at this flow rate?

(c) Determine the unrecovered pressure loss for both the orifice and the venturi in psi under these conditions.