OSHA 30- Excavation Hazards, Soils Exam Questions and Answers 100% Pass

OSHA 30- Excavation Hazards, Soils Exam Questions and Answers 100% Pass A cubic yard of soil can weigh as much as: - A small pickup truck To be classified as type A, the soil cannot be - All 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 - True A soil cannot be Type A if it is: - All of the above Which of the following are common soil classification tests? - All except C A soils are usually clay and cemented soils such as caliche and hardpan - True Each of the following is Type B soil EXCEPT: - Sand 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 - True 2100% Pass Guarantee Emilly Charlotte, All Rights Reserved © 2025 The most important distinction b/w stable rock types A&B and type C is: - Degree of stability A defining feature of stable rock is that it will: - Remain 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 - False Aluminum hydraulic shoring permits both installation and removal without entering the trench - True Shores must be pumped to a minimum of 750 pounds of pressure but more is recommended - True Type B soils afford how many options of protection? - Four Which soil type is the most common? - Type B Which of the following statements is true of kickout? - All of the above Mixed oak timber have a greater bending strength per square inch than Douglas fir - False In type C soil, the angle of repose is very low, how many degrees must the angle be? - 34 3100% Pass Guarantee Emilly Charlotte, All Rights Reserved © 2025 The depth at which an excavation needs attention from a registered professional engineer is: - 20 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. - True Shoring and shielding can be custom built from tabulated data approved by a registered PE. - True The struts of a screw jack system must be adjusted manually, which creates a hazard because the worker is required to: - Be in the