Question:
Which of the following are the most important parts of a centrifugal pump ?
Which of the following are the most important parts of a centrifugal pump ?
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In a centrifugal pump:
- The impeller increases fluid velocity (adds kinetic energy).
- The volute casing decreases fluid velocity (converts kinetic energy into pressure energy).
- The volute casing decreases fluid velocity (converts kinetic energy into pressure energy).
Updated On: Jul 21, 2026
- Vane and piston
- Impeller and volute
- Diaphragm and shaft
- Gear and vane
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The Correct Option is B
Solution and Explanation
Step 1: Understanding the Concept:
A centrifugal pump is a dynamic machine used in dairy plants to pump milk, water, and cleaning solutions.
It uses centrifugal force to increase the kinetic energy of the liquid and convert it into pressure energy.
Step 2: Detailed Explanation:
The two primary components of a centrifugal pump are:
1. Impeller: This is the rotating element of the pump.
It contains a series of curved vanes.
As the motor spins the shaft, the impeller rotates, accelerating the fluid and throwing it outward by centrifugal force, which increases its kinetic energy.
2. Volute Casing: This is the stationary, spiral-shaped outer casing surrounding the impeller.
As the high-velocity liquid leaves the impeller, the increasing cross-sectional area of the volute casing slows down the fluid.
According to Bernoulli's principle, this reduction in velocity converts the kinetic energy of the fluid into pressure energy, allowing it to overcome flow resistance and be pumped through the system.
Therefore, the impeller and volute are the most important parts of a centrifugal pump.
Pistons, diaphragms, and gears are parts of positive-displacement pumps, not centrifugal pumps.
Step 3: Final Answer:
The most important parts of a centrifugal pump are the Impeller and volute.
A centrifugal pump is a dynamic machine used in dairy plants to pump milk, water, and cleaning solutions.
It uses centrifugal force to increase the kinetic energy of the liquid and convert it into pressure energy.
Step 2: Detailed Explanation:
The two primary components of a centrifugal pump are:
1. Impeller: This is the rotating element of the pump.
It contains a series of curved vanes.
As the motor spins the shaft, the impeller rotates, accelerating the fluid and throwing it outward by centrifugal force, which increases its kinetic energy.
2. Volute Casing: This is the stationary, spiral-shaped outer casing surrounding the impeller.
As the high-velocity liquid leaves the impeller, the increasing cross-sectional area of the volute casing slows down the fluid.
According to Bernoulli's principle, this reduction in velocity converts the kinetic energy of the fluid into pressure energy, allowing it to overcome flow resistance and be pumped through the system.
Therefore, the impeller and volute are the most important parts of a centrifugal pump.
Pistons, diaphragms, and gears are parts of positive-displacement pumps, not centrifugal pumps.
Step 3: Final Answer:
The most important parts of a centrifugal pump are the Impeller and volute.
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