Which sampler is designed to retrieve large water samples from any depth and also collects floating sediments?

• A. Bacon bombs
• B. Alpha samplers
• C. Weighted bottle samplers
• D. Dippers

Answer: (B)

The main idea here is understanding how a sampler’s design matches the needs of collecting water from multiple depths and capturing material that floats at the surface. An Alpha sampler is built to take a large-volume water sample and can be deployed from any depth, which is essential when you need bulk water for analyses or to ensure representative sampling across the water column. Its design also allows floating sediments or surface films to be included in the sample—either by how the device fills and seals or by incorporating a mechanism that traps surface material as it ascends or is retrieved. This combination of large-volume capability, depth versatility, and inclusion of floating sediments is what makes it the best choice. Other samplers tend to be limited to smaller volumes, surface-only collection, or depth-specific, smaller-volume grabs, so they don’t meet all these requirements as effectively.