Lesson 5: Excavating the Trench
Questions Fully Solved.
To provide support for the sides of trenches, workers could use ? . - Answer all of the above
Material or debris shall not be placed within ? of an open trench in which a man can work. -
Answer 36"
As referenced, OSHA (1926.650)(a)(I)(ii) states, "excavations less than ? do not require a
protection system if the competent person has determined there is no cave-in potential." -
Answer 5'
Ladders or suitable ramps are to be used for entering or leaving trenches when the depth is ? or
more. - Answer 4'
Ladders, stairways, or ramps are permitted means of exit and entry. They must be installed so
that any worker does not have to travel more than ? in a lateral direction to reach the exit. -
Answer 25'
Soil weighing 100 pounds per cubic foot will have a cubic yard weight of ? . - Answer 2700 lbs
A natural soil material that can be excavated with vertical sides and will remain intact while
exposed would be classified as ? . - Answer stable rock
? is a term that means that the sides of the trench are excavated to form one or a series of
horizontal levels or steps, usually with vertical or near-vertical surfaces between the levels. -
Answer Benching
? is a protective system that protects employees within excavations and trenches by excavating
the sides of the trench or excavation to form sides that slope away from the excavation to
protect against cave-ins. - Answer Sloping
When shields are used in trenching excavations, the excavation of the earth is permitted to a
level not greater than ? below the bottom of the shield. - Answer 2'
Questions Fully Solved.
To provide support for the sides of trenches, workers could use ? . - Answer all of the above
Material or debris shall not be placed within ? of an open trench in which a man can work. -
Answer 36"
As referenced, OSHA (1926.650)(a)(I)(ii) states, "excavations less than ? do not require a
protection system if the competent person has determined there is no cave-in potential." -
Answer 5'
Ladders or suitable ramps are to be used for entering or leaving trenches when the depth is ? or
more. - Answer 4'
Ladders, stairways, or ramps are permitted means of exit and entry. They must be installed so
that any worker does not have to travel more than ? in a lateral direction to reach the exit. -
Answer 25'
Soil weighing 100 pounds per cubic foot will have a cubic yard weight of ? . - Answer 2700 lbs
A natural soil material that can be excavated with vertical sides and will remain intact while
exposed would be classified as ? . - Answer stable rock
? is a term that means that the sides of the trench are excavated to form one or a series of
horizontal levels or steps, usually with vertical or near-vertical surfaces between the levels. -
Answer Benching
? is a protective system that protects employees within excavations and trenches by excavating
the sides of the trench or excavation to form sides that slope away from the excavation to
protect against cave-ins. - Answer Sloping
When shields are used in trenching excavations, the excavation of the earth is permitted to a
level not greater than ? below the bottom of the shield. - Answer 2'
