APSC AE WRD 2019 PYQ: Pump for Water Supply

Pump for Water Supply Mains Multiple Choice Question

Question: The pump commonly used for lifting water in water supply mains is:
(A) Axial flow pump
(B) Centrifugal pump
(C) Reciprocating pump
(D) Rotary pump

Answer: (A) Axial flow pump

Explanation

Axial flow pumps are commonly used for lifting water in water supply mains due to their ability to handle high flow rates with low pressure (head). They are ideal for applications such as water distribution systems and power plants where large volumes of water need to be moved efficiently.

Characteristics of Pump Types

Pump Type	Characteristics	Typical Applications
Axial Flow Pump	High flow rates, low pressure (head).	Water supply mains, power plants, flood control.
Centrifugal Pump	Moderate to high flow, moderate pressure, suitable where little or no suction lift is required.	Oil refineries, power plants, water supply from pressure mains.
Reciprocating Pump	Low flow, high pressure, handles small quantities of liquid.	Oil drilling operations, pneumatic pressure systems.
Rotary Pump	Handles high-viscosity liquids.	Refrigeration, heating, air conditioning, oil transfer.

Key Notes

• Axial flow pumps are preferred for water supply mains due to their efficiency in moving large volumes of water at low pressure.
• Centrifugal pumps are more suited for applications requiring moderate pressure and where suction lift is minimal.
• Reciprocating and rotary pumps are specialized for high-pressure or high-viscosity applications, respectively, and are not ideal for water supply mains.
• Selecting the appropriate pump type is critical in civil engineering for efficient water management and infrastructure design.

Note: The axial flow pump is the most suitable choice for lifting water in water supply mains, ensuring high flow rates and efficient water distribution in civil engineering applications.

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