Question

Part 1. If the absolute pressure in a tank is 140 kPa, determine the pressure head in mm of mercury. the atmospheric pressure is 100 kPa.

Part 2. Oxygen in a tank has an absolute pressure of 130 kPa. Determine the pressure head in mm of mercury. The atmospheric pressure is 102 kPa.

Answer 1

1)

$p'=p-p_0=40~\text{kPa}=300$ mm of mercury.

2)

$p'=p-p_0=28~\text{kPa}=210$ mm of mercury.