A cubic yard of soil can weigh as much as: correct answersA small pickup truck
To be classified as type A, the soil cannot be correct answersAll of the above (disturbed, part of a mixed layered system, subject to vibration, seeping water
When your trench is deeper than 4 ft and hazards may be...
A cubic yard of soil can weigh as much as: correct answersA small pickup truck
To be classified as type A, the soil cannot be correct answersAll of the above (disturbed, part of a mixed
layered system, subject to vibration, seeping water
When your trench is deeper than 4 ft and hazards may be present, air monitoring must be done before
entry correct answersTrue
A soil cannot be Type A if it is: correct answersAll of the above
Which of the following are common soil classification tests? correct answersAll except C
A soils are usually clay and cemented soils such as caliche and hardpan correct answersTrue
Each of the following is Type B soil EXCEPT: correct answersSand
The definition of type C-60 soil is provided by manufactures to allow the competent person an
opportunity to use vertical shores or other protective systems in accordance with tables provided by the
manufacture correct answersTrue
The most important distinction b/w stable rock types A&B and type C is: correct answersDegree of
stability
A defining feature of stable rock is that it will: correct answersRemain intact while exposed
OSHA requires that the competent person perform two visual and two manual test on a soil sample fresh
out of the ground and not impacted by weather conditions at the site correct answersFalse
, Aluminum hydraulic shoring permits both installation and removal without entering the trench correct
answersTrue
Shores must be pumped to a minimum of 750 pounds of pressure but more is recommended correct
answersTrue
Type B soils afford how many options of protection? correct answersFour
Which soil type is the most common? correct answersType B
Which of the following statements is true of kickout? correct answersAll of the above
Mixed oak timber have a greater bending strength per square inch than Douglas fir correct answersFalse
In type C soil, the angle of repose is very low, how many degrees must the angle be? correct answers34
The depth at which an excavation needs attention from a registered professional engineer is: correct
answers20 ft
Placing a shield (e.g., trench shield or trench box) between the side of an excavation and the work area
can minimize the risk in the event of a cave in. correct answersTrue
Shoring and shielding can be custom built from tabulated data approved by a registered PE. correct
answersTrue
The struts of a screw jack system must be adjusted manually, which creates a hazard because the worker
is required to: correct answersBe in the trench in order to adjust the strut
All systems have a set of manufacturer's tabulated data to be used for proper design and installation of
the equipment correct answersTrue
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