What retrieves large water samples from any depth and collect floating sediments?

• A. Bacon bombs
• B. Alpha samplers
• C. The DPD kit
• D. The DR 900

Answer: (B)

When you need a large volume of water from any depth and you want to capture floating sediments, you look for a sampler designed to bring back a substantial, undisturbed sample from the entire water column, including surface materials. Alpha samplers are built for that purpose: they can be lowered to depth, collect a large amount of water in a single sample, and preserve or trap floating sediments as the sample is sealed and brought up. This combination—volume, depth versatility, and inclusion of surface-floating material—is exactly what you want for studying suspended sediments and surface slicks.

The other devices are not suited for this specific task. DPD kits are chemical test kits used for measuring things like chlorine, not for collecting large-depth water samples. The DR 900 is an instrument or analyzer rather than a sampling device. Bacon bombs are not the standard equipment for retrieving large-volume water samples or floating sediments.