Question

in the absence of other information, all soil in an excavation should be treated as if it is what soil type?
type a
type b
type c
solid rock

Explanation:

In excavation safety, when no other soil - related information is available, soil is treated as Type C soil. Type C soil is the least stable among common soil types for excavation purposes. Type A is the most stable, Type B is moderately stable, and solid rock is not soil.

Answer:

C. Type C