A manometer, with pressure taps 25 ft apart, is used to measure the pressure drop of oil (SG = 0.82) flowing in a 1.5-in. pipe with a volumetric flow rate of 4 ft2/min. The manometer fluid is mercury (SG = 13.6). From the lower pressure tap to the surface of the mercury highest in the manometer is 2 ft, and the distance from the upper pressure tap to the same height in the mercury is 4 ft. For a manometer deflection of 4 in., determine:
a. the flow direction
b. the friction factor
c. whether the flow is laminar or turbulent
d. the oil viscosity (in lbm/ft s)