Osha 30 construction excavation questions with correct answers

Osha 30 construction excavation questions with correct answers when your trench is deeper than 4 feet and hazards may be present air monitoring must be done before entry A. true Excavation safety standards have introduced in 1989 A. true To be classified as type a the soil cannot be E. all of the above each of the following is a type b soil except D. sand A soil are usually clays and cemented soil such as caliche and hardpan A. true Which of the following are common soil classification tests E. all except c the most important distinction between stable rock types is C. degree of stability the definition of type c 60 soil is provided by manufacturers to allow the competent person an opportunity to use vertical shores or other protective systems in accordance with tables provided by the manufacturer A. true A defining feature of stable rock is that it will B. remain intact while exposed Osha requires that the competent person perform two visual and two manual tests B. False A soil cannot be type a if it is D. all of the above which of the following statements is true of kick out D. all of the above Which soil type is the most common b. Type b True or false shores must be pumped to a minimum of 750 lbs of pressure but more is recomended A.true Type b soils afford how many options of protection d. four true or false mixed oak timbers have a greater bending strength per square inch than douglas fir. B. false True or false aluminum hydraulic shoring permits both installation and removal without entering the trench A. true In type c soil the angle o repose is very low how many degrees must the angle be D. 34 degrees the struts of a screw jack system must be adjusted manually which creates a hazard because B. be in the trench in order to adjust the strut The depth at which an excavation needs attention from a registered pro engineer is D. 20 feet T or F all systems have a set of manufacturers tabulated data to be used for proper design and installation of the equipment A. True placing a shield between the side of an excavation and the work area can minimize the risk in the event of a cave in A. true Shoring and shielding can be custom built from tabulated data approved by a engineer A true when exposed to vehicular traffic your excavation d. all of the above surface encumbrance b hazard eye contact outside radius true water accumulation all are true except d. special shields are not allowed walkway rails b 6ft