Which type of tube sampler is a narrow tube (with a T-handle) that is open on one side and is used primarily for sampling of loose soil on the surface or just under the surface?

• A. The push tube sampler
• B. A trier sampler
• C. Veihmeyer Tube Sampler
• D. Split Spoon Tube Sampler

Answer: (B)

The question tests understanding of a simple, hand-operated, shallow soil sampling tool. A trier sampler is a narrow tube with a T-handle that you push into loose soil at or just below the surface. Its end is open, allowing the soil to enter the tube and be collected as a small sample without fine-scale disturbance, making it ideal for quick, near-surface sampling of loose soils.

In contrast, the push tube sampler is a longer tube used for deeper borehole sampling; the Veihmeyer tube sampler is a closed, undisturbed-sample device typically used in cohesive soils; and the split spoon is a thick, two-halves tube used with a hammer for sampling after a penetration test.