ATT Sampling Aggregates

Question 1

Which ASTM standard outlines procedures for sampling aggregates?

Accepted Answer

ASTM D75/D75M

Answer

ASTM C136

Answer

ASTM C117

Answer

ASTM C29

Question 2

When sampling from a stockpile, what is the most important principle to follow?

Accepted Answer

Collect from various depths and locations.

Answer

Collect only from the top of the pile.

Answer

Sample only dry areas.

Answer

Take the sample from near the edges only.

Question 3

How should a field sample be reduced to testing size?

Accepted Answer

Using a mechanical splitter or quartering method.

Answer

By handpicking desired particles.

Answer

By taking a single scoop from the center.

Answer

By mixing with water and decanting.

Question 4

Which of the following is a valid sampling location for aggregate in transport?

Accepted Answer

From a stopped conveyor or truck bed.

Answer

Only from a moving belt conveyor.

Answer

From the bottom of a wet stockpile.

Answer

From the front loader bucket.

Question 5

Why must aggregate samples be protected from moisture loss?

Accepted Answer

To maintain accurate test results.

Answer

To prevent segregation of particles.

Answer

To preserve chemical content.

Answer

To avoid staining the containers.

Question 6

What is the minimum number of increments required when sampling from a flowing stream?

Accepted Answer

Five

Answer

Three

Answer

Four

Answer

Ten