Question

Archemedian screw is suitable to lift water from open water bodies to height ranging from

• A. 0.5 to 1.20 m
• B. 1.2 to 3.0 m
• C. 3.0 to 4.0 m
• D. 4.0 to 5.0 m

Hint:

The Archimedean screw is a classic "low-head, high-discharge" water-lifting device.
It is exceptionally energy-efficient for lifting water up to 1.2 meters.

Answer 1

The Correct Option is A

Step 1: Understanding the Concept:
The Archimedean screw is an ancient water-lifting device consisting of a helical screw inside a hollow cylinder.
It is designed for low-lift, high-volume water transport.
Detailed Explanation:
- The Archimedean screw is highly effective for lifting water from open channels, canals, and drains where the required lift head is minimal.
- Because of its physical design, as the screw rotates, water is scooped up in pockets and pushed upward along the spiral track.
- It is most efficient at low operating heads, typically ranging from ______0.5 to 1.2 meters______.
- Attempting to use this device for higher lifts (such as $> 1.5 \text{ m}$) significantly decreases its mechanical efficiency and increases water slippage down the screw.
- It is widely used in irrigation, drainage canals, and wastewater treatment plants for its simplicity and ability to handle suspended solids without clogging.

Step 2: Final Answer:
The suitable lift height for an Archimedean screw is 0.5 to 1.20 m, corresponding to option (A).