Water Distribution Grade 1 Certification Practice Exam

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What is one disadvantage of a centrifugal pump?

It is not self-priming
It is highly efficient
It has low maintenance requirements
It can operate at high pressures

The correct answer is: It is not self-priming

A centrifugal pump is widely used for various water distribution applications due to its efficient performance. One key disadvantage of a centrifugal pump is that it typically relies on the fluid in the suction line to create the initial prime. If the pump is not primed, it will not be able to lift the liquid from the source, making it non-self-priming. This characteristic means that additional procedures or equipment, such as a foot valve or a separate priming device, may be necessary to ensure proper operation, especially if the pump is situated above the water source. The other options highlight advantages of centrifugal pumps. They are known for their high efficiency in moving liquids and require relatively low maintenance compared to other pumping types. Furthermore, centrifugal pumps can operate effectively under high pressures, making them suitable for a wide range of applications. However, the dependency on being primed signifies a limitation that operators need to be mindful of to ensure proper functioning.