SafetyQuestion 661 of 700
A competent person classifies excavation soil by unconfined compressive strength. Which value range correctly identifies Type B soil?
a.1.5 tons per square foot or greater
b.Greater than 0.5 but less than 1.5 tons per square foot
c.Less than 0.5 tons per square foot
d.Exactly 0 tons per square foot (running soil only)
Explanation
Correct: Type B soil has an unconfined compressive strength greater than 0.5 but less than 1.5 tsf. Type A is 1.5 tsf or greater (the most stable cohesive soil), and Type C is less than 0.5 tsf (least stable). A value of exactly 0 does not define a class; classification uses the ranges above along with other factors like layering and water.
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