A Rated Guide Questions and Answers Solved

OSHA 30 Construction Excavation 2023 – 2024

| A+ Rated 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

Answer: b 6ft