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OSHA 30 Construction Excavation 2023 – 2024
Guide Questions and Answers (Solved)
- when your trench is deeper than 4 feet and hazards may be present air monitoring
must be done before entry
Answer: A. true
- Excavation safety standards have introduced in 1989
Answer: A. true
- To be classified as type a the soil cannot be
Answer: E. all of the above
- each of the following is a type b soil except
Answer: D. sand
- A soil are usually clays and cemented soil such as caliche and hardpan
Answer: A. true
- Which of the following are common soil classification tests
Answer: E. all except c
- the most important distinction between stable rock types is
Answer: 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
Answer: A. true
- A defining feature of stable rock is that it will
Answer: B. remain intact while exposed
- Osha requires that the competent person perform two visual and two manual
tests
Answer: B. False
- A soil cannot be type a if it is
Answer: D. all of the above
- which of the following statements is true of kick out
Answer: D. all of the above
- Which soil type is the most common
Answer: b. Type b
- True or false shores must be pumped to a minimum of 750 lbs of pressure but more
is recommended
Answer: A.true
- Type b soils afford how many options of protection
Answer: d. four
- true or false mixed oak timbers have a greater bending strength per square inch
than douglas fir.
Answer: B. false
- True or false aluminum hydraulic shoring permits both installation and removal
without entering the trench
Answer: A. true
- In type c soil the angle o repose is very low how many degrees must the angle
be
Answer: D. 34 degrees
- the struts of a screw jack system must be adjusted manually which creates a
hazard because
Answer: 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
Answer: 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
Answer: 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
Answer: A. true
- Shoring and shielding can be custom built from tabulated data approved by a
engineer
Answer: A true
- when exposed to vehicular traffic your excavation
Answer: d. all of the above
- surface encumbrance
Answer: b hazard
- eye contact outside radius
Answer: true
- water accumulation all are true except
Answer: d. special shields are not allowed
- walkway rails
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