A manometer containing an oil with a specific gravity (SG) of 0.92 is connected across an orifice plate in a horizontal pipeline carrying seawater (SG = 1.1). If the manometer reading is 16.8 cm, what is the pressure drop across the orifice?

Solution :

Given :

1) S.G of Oil = 0.92

$\rho_{oil}$ = 920 kg/m³

2) S.G of Seawater = 1.1

$\rho_{seawater} $ = 1100 kg/m³

3) Difference in level (h) = 16.8 cm

&= 0.168 m

Required Concept

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