Water Treatment Operator-in-Training (OIT) Practice Test

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How far does 1 kPa raise water?

10.2 cm
20.0 cm
30.5 cm
15.5 cm

The correct answer is: 10.2 cm

Raising water height due to pressure can be understood through the hydrostatic pressure principle, where the pressure exerted by a column of liquid is determined by the height and density of the liquid. For water, a pressure increase of 1 kPa (kilopascal) raises the water level by approximately 10.2 centimeters. This figure is derived from the equation: Pressure (P) = height (h) × density (ρ) × gravitational acceleration (g). In the case of water, the density is around 1000 kg/m³, and gravitational acceleration is approximately 9.81 m/s². When you substitute these values, you find that a kPa corresponds to a water column height of about 10.2 cm. This calculation reflects the physical properties of water and emphasizes the relationship between pressure and height, making 10.2 cm the correct answer for how far 1 kPa raises water.