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Questions and Answers
What is the primary function of a centrifugal pump?
What is the primary function of a centrifugal pump?
- Convert electrical energy into pressure energy
- Convert pressure energy into rotational energy
- Convert mechanical energy into pressure energy (correct)
- Convert hydraulic energy into mechanical energy
How does the flow occur in centrifugal pumps?
How does the flow occur in centrifugal pumps?
- Radial outward direction (correct)
- Circular motion
- Random chaotic flow
- Axial inward direction
What type of flow principle does a centrifugal pump work on?
What type of flow principle does a centrifugal pump work on?
- Forced vortex flow (correct)
- Natural convection flow
- Laminar flow
- Turbulent flow
What part of a centrifugal pump is responsible for rotating the liquid?
What part of a centrifugal pump is responsible for rotating the liquid?
How does the rise in pressure head in a centrifugal pump vary with the tangential velocity of the liquid?
How does the rise in pressure head in a centrifugal pump vary with the tangential velocity of the liquid?
Which part of a centrifugal pump is connected to the shaft of an electric motor?
Which part of a centrifugal pump is connected to the shaft of an electric motor?
What is the precaution against cavitation related to the pressure of the flowing liquid in the hydraulic system?
What is the precaution against cavitation related to the pressure of the flowing liquid in the hydraulic system?
What effects are observed due to cavitation on turbine blades?
What effects are observed due to cavitation on turbine blades?
How is Net Positive Suction Head (NPSH) defined?
How is Net Positive Suction Head (NPSH) defined?
How is NPSH related to cavitation-free pump operation?
How is NPSH related to cavitation-free pump operation?
What distinguishes between the required and available NPSH for a pump installation?
What distinguishes between the required and available NPSH for a pump installation?
What materials are recommended as a precaution against cavitation?
What materials are recommended as a precaution against cavitation?
What is the main function of the casing surrounding the impeller in a centrifugal pump?
What is the main function of the casing surrounding the impeller in a centrifugal pump?
What is the purpose of a foot valve in the suction pipe of a centrifugal pump?
What is the purpose of a foot valve in the suction pipe of a centrifugal pump?
In a multistage centrifugal pump, impellers connected in series are used primarily to:
In a multistage centrifugal pump, impellers connected in series are used primarily to:
What is the main function of connecting impellers in parallel in a multistage centrifugal pump?
What is the main function of connecting impellers in parallel in a multistage centrifugal pump?
Which phenomenon describes the formation of vapor bubbles in a flowing liquid due to pressure drop?
Which phenomenon describes the formation of vapor bubbles in a flowing liquid due to pressure drop?
In a centrifugal pump, what occurs when the pressure of the flowing liquid falls below its vapor pressure?
In a centrifugal pump, what occurs when the pressure of the flowing liquid falls below its vapor pressure?
What action causes pitting on metallic surfaces due to cavitation in pumps?
What action causes pitting on metallic surfaces due to cavitation in pumps?
What is the primary reason for connecting multiple impellers on the same shaft in a multistage pump?
What is the primary reason for connecting multiple impellers on the same shaft in a multistage pump?
What is the role of a strainer at the lower end of a suction pipe connected to a centrifugal pump?
What is the role of a strainer at the lower end of a suction pipe connected to a centrifugal pump?
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