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Soil Classification – C011ME (21 min.)

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1
A dry strength test is also known as the ribbon test.
2
The “olive jar test” is used to ________.
3
A competent person is required to conduct inspections ________.
4
A_________ is used to measure the unconfined compressive strength of the soil.
5
Type B soil is identified as ________.
6
When performing a manual test, take a palm-sized sample of moist soil and mold it into a ball and then roll it into threads about _____ inches in diameter.
7
When taking a soil sample, the competent person should look for _________.
8
The classification of soil must be performed by the competent person prior to anyone entering the excavation.
9
Type A soil is generally made up of _________.
10
The “thumb penetration test” must be performed on undisturbed moist soil samples the size of a baseball.
11
An average cave-in can drop five yards or 13,500 pounds of dirt.
12
Soil particles may be held together with a natural chemical agent such as _________.
13
A manual test is assessing the soil with your hands or an instrument designed to measure soil strength.
14
OSHA classifies soils into four categories: Type A, Type B, Type C and ________.
15
Soil classification determines the appropriate trench protection measures to choose by consulting the sloping and shoring tables in the ASTM standards.
16
The different types of soil tests are _________.
17
The less clay in the soil makeup, the better the trench wall will hold up.
18
The competent person must classify the soil by using at least one visual and one manual test.
19
A competent person should be knowledgeable of safety standards, capable of identifying hazards in the surroundings and working conditions that are dangerous to employees.