15 Questions
What is the weight of one litre of pure water at 4°C?
9.81 N
What is the unit of pressure defined as a force of one newton over an area of one square metre?
Pascal
If one litre of water is spread evenly over the base of a container with an area of one square metre, what pressure will it exert?
9.81 Pa
How does the pressure exerted at the base of a column of liquid vary?
Depends on the height of the liquid
If one litre of mercury is placed in a container with an area of 0.0049 m2, what pressure will it exert?
27228 Pa
What is friction head in a pump?
The pressure to overcome friction, measured in equivalent metres
Where is velocity head found in a pumping system?
On both the suction and discharge sides of the pump
What is net positive suction head (NPSH) calculated by taking into account?
Fluid densities, vapour pressures, velocities, pipe friction, pressure head, and static head or lift on the suction side of the pump
What does total dynamic head in a pumping system take into account?
Dynamic suction head, dynamic discharge head, static suction head, static discharge head, and pressure head
What is shut-off head in a centrifugal pump?
The head developed by a centrifugal pump when running with its discharge valve shut
What is the formula that summarizes the relationship between pressure, density, acceleration due to gravity, and height of liquid?
P = ρg
What is Pascal's Paradox related to in the context of fluid pressure?
The pressure at the base of a column of fluid is not affected by the shape of the container.
What is static head in a pumping system?
The head measured with the pump off and no liquid flowing.
What is dynamic head in a pumping system related to?
Overcoming friction in pipes, valves, and fittings.
What does static suction lift measure in a pumping system?
The distance below the centerline of the pump between the surface of the liquid level of a supply tank and the centre line of the pump.
Test your understanding of the theory of pumping and pressure calculation with this quiz. Learn about the force of gravity on liquids, weight calculation, and pressure measurement.
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