In drafting operations, what does a strainer prevent?

• A. Filter water to improve quality.
• B. Increase suction.
• C. Drain water.
• D. Prevent debris from entering pumps.

Answer: (D)

In drafting operations, the main job of a strainer is to keep debris out of the pump. It sits in the suction line and catches things like mud, sand, leaves, and small rocks before they can reach the impeller and other pump components. By preventing these solids from entering, the strainers protect the pump from damage, reduce wear and clogging, and help maintain smooth, efficient operation.

This isn’t about filtering water for quality or increasing suction, nor about draining water. Those aren’t the functions of a strainer in drafting setups. The device is there to shield the pump from debris that could cause harm or inefficiency, making it the best answer.