Per 29 CFR 1926.651, a stairway, ladder, ramp, or other safe means of egress is required in a trench excavation once the trench reaches what minimum depth?
Safety Cfr
Question · Easy
Divide by twenty-seven
Short
Unless a retaining device is used, excavated spoil that could fall or roll into a water-line trench must be kept at least how far from the edge of the excavation?
Under 29 CFR 1926.652, a protective system against cave-ins is required in excavations that are 5 feet or deeper unless which condition is met?
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Under 29 CFR 1926 Subpart P, which statement best describes a competent person for excavation work?
For an excavation less than 20 feet deep in Type C soil, what is the maximum allowable slope under OSHA 1926 Subpart P Appendix B?
Question · Medium
A 4-foot-deep sewer trench is 80 feet long. How must ladders or other means of egress be spaced under 29 CFR 1926.651(c)(2)?
Sloping or benching for an excavation greater than 20 feet deep must be designed by whom?
Where oxygen deficiency or a hazardous atmosphere exists or could reasonably be expected, the atmosphere in an excavation shall be tested before employees enter once the excavation is greater than what depth?
A cohesive clay has an unconfined compressive strength of 1.8 tsf, but the material was previously disturbed when an old sewer was removed. How must a competent person classify that soil under Appendix A?
How often must a competent person inspect excavations, adjacent areas, and protective systems under 29 CFR 1926.651(k)?
A sewer trench in Type C soil is 8 feet deep with a 3-foot-wide flat bottom. Using the Appendix B maximum allowable slope of 1-1/2 horizontal to 1 vertical on both sides, what is the minimum top width of the excavation?
Question · Hard
A crew proposes to bench a 10-foot-deep water-main trench in Type C sandy soil instead of sloping it. What does OSHA 1926 Subpart P require?
Before a normal excavation for a South Carolina water or sewer line, how much notice must the excavator give SC811?
General Knowledge
If a South Carolina excavation site cannot be clearly identified from the locate notice, what color must the excavator use to pre-mark the dig area?
Under the APWA Uniform Color Code used by SC811, what do blue marks indicate?
Under the APWA Uniform Color Code used by SC811, what do green marks indicate?
Which task does SC811 itself perform after a locate request is submitted?
For most South Carolina land excavation, how wide is the Tolerance Zone around a marked utility?
How long does a normal SC811 locate request remain valid after its start time?
On a South Carolina water-main job, who is responsible for locating private facilities that run beyond the meter or public right-of-way?
A designer submits an SC811 Design request for a future sewer alignment. What is true of that request?
When excavating parallel to a marked facility inside the South Carolina Tolerance Zone, how often must the excavator visually expose the facility?
For subaqueous excavation in a South Carolina waterway, how far does the Tolerance Zone extend on either side of a marked facility?
An SC811 operator fails to provide a Positive Response within the required timeframe, and there are visible indicators of an unmarked facility. After the excavator issues a No Show, how long do the affected operators have to respond?
A new South Carolina water-and-sewer project will take more than 90 days and includes more than 1 mile of utility infrastructure in an area with underground facilities. What advanced-notice duty applies?
A backhoe nicks a marked gas service while a water main is being laid. Besides protecting people and calling 911 if there is a release, what must the excavator do under the SC811 Excavator Manual?
On a sewer plan-and-profile, what does the invert elevation represent?
Design Elevations
Percent grade (percent slope) of a sewer is calculated as which of the following?
If a circular pipe has an invert elevation of 84.25 feet and an inside diameter of 18 inches, what is the inside crown elevation?
A sewer is designed at a uniform 0.40 percent slope. The upstream invert at Station 10+00 is 12.50 feet. What is the downstream invert at Station 12+50?
Field shots show invert 86.40 feet at Station 10+00 and invert 85.20 feet at Station 12+00. What is the installed percent grade?
Finished ground over a water main is 102.00 feet. The invert is 94.50 feet and the pipe outside diameter is 16 inches. What is the earth cover over the top of the pipe?
A sewer is on a uniform grade. Invert is 50.00 feet at Station 5+00 and 49.60 feet at Station 6+00. What invert should be set at Station 5+50?
A laser is set to a 0.50 percent sewer grade. How many inches does the invert drop in each horizontal foot?
Approximately how many gallons of water are contained in 500 feet of 12-inch inside-diameter pipe flowing full? Use 7.48 gallons per cubic foot.
A sewer leaves Manhole A at invert 20.00 feet, runs 300 feet at 0.40 percent, then 150 feet at 0.80 percent to Manhole C. What is the invert at Manhole C?
A trench is 4.0 feet wide, 8.0 feet deep, and 200 feet long. How many bank cubic yards of excavation is that?
A manhole rim is 112.40 feet. The incoming invert is 98.20 feet and the outgoing invert is 97.90 feet. What is the drop through the manhole?
A 10-foot-deep water-main excavation in Type C soil will be sloped at the OSHA maximum of 1-1/2:1 on both sides. The trench bottom is 4 feet wide. What top width is required?
A 24-inch inside-diameter sewer with a 4-inch wall (32-inch outside diameter) is laid at invert 76.00 feet. Finished grade is 82.00 feet. What is the cover over the outside top of the pipe?
According to the ACPA Concrete Pipe & Box Culvert Installation manual, where should placement of a gravity concrete-pipe line start, and which way should the bells face?
Concrete Pipe Installation
In an ACPA Standard Installation, which zone from the foundation up to the pipe springline provides significant structural support and reduces pipe stress?
After a rubber-gasket concrete-pipe joint is assembled, what must the installer verify on every section?
Before a rubber-gasket concrete-pipe joint is made, what must be done to the bell and the spigot?
Why does ACPA require a uniform, properly graded bedding under a precast box culvert before the box is set?
After precast box culvert sections have been joined, what does ACPA require for the lifting holes?
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