Per OSHA 1926 Subpart Q, which practice is prohibited during concrete placement?
Safety
Question · Easy
Divide by twenty-seven
Short
OSHA requires protruding reinforcing steel that employees could fall onto or into to be guarded for what purpose?
While a concrete bucket is being elevated or lowered into position, OSHA 1926.701(e) requires that:
Question · Medium
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During post-tensioning operations, OSHA 1926.701(c) requires which combination of controls?
An employee is applying a cement, sand, and water mixture through a pneumatic hose. Which PPE does OSHA 1926.701(f) specifically require?
When may construction loads be placed on a newly cast concrete structure under OSHA 1926.701(a)?
Concrete mixers with 1 cubic yard (0.8 m³) or larger loading skips must be equipped with which OSHA 1926.702(b) features?
A walk-behind power trowel that is manually guided must have which OSHA control?
Concrete pumping systems that use discharge pipes must have pipe supports designed for what OSHA overload?
A tilt-up wall panel will be lifted with embedded inserts. Under OSHA 1926.704, those tilt-up inserts must be capable of supporting at least:
Question · Hard
Who may be under a precast concrete member while it is being lifted or tilted into position?
A crew will repair a concrete pump. OSHA 1926.702(j) requires energy sources to be locked out and tagged. What language must the tag use?
Before excavating for a South Carolina footing, an excavator must notify SC811 how far in advance of a normal (non-subaqueous) dig?
Concrete Earthwork
After SC811 marks a buried facility, the South Carolina tolerance zone is:
Inside the SC811 tolerance zone, what digging method is required until the facility is visually located or confirmed absent to the excavation depth?
Unless renewed, a normal SC811 locate request remains valid for how long?
After waiting the required SC811 notice period, what must the excavator confirm before starting a footing excavation?
A trench for a grade beam is 5 feet deep. OSHA 1926.651(c)(2) requires a stairway, ladder, ramp, or other safe means of egress so that employees travel no more than:
Unless a retaining device is used, excavated spoil that could fall or roll into a footing excavation must be kept at least how far from the edge?
In soil that is not stable rock, OSHA generally requires a protective system (slope, bench, shore, or shield) when an excavation reaches what depth?
For a simple slope in Type C soil 20 feet deep or less, OSHA Appendix B allows a maximum slope of:
Who must inspect an excavation, the adjacent area, and the protective system for cave-in evidence, system failure, and hazardous atmospheres?
Under the APWA uniform color code used with SC811, white markings identify:
A contractor will excavate a 40-foot by 25-foot by 4-foot-deep pit in bank measure. What is the excavated volume in cubic yards, bank measure?
Before placing a concrete slab-on-ground, IBC site preparation requires which of the following?
A footing excavation is 180 cubic yards bank measure. The soil has a 25 percent swell from bank to loose. How many loose cubic yards should be planned for hauling?
For formwork and quantity takeoff, normalweight fresh concrete is customarily assumed to weigh:
Concrete
How many cubic feet are in 1 cubic yard of concrete?
A 40-foot by 60-foot slab is 4 inches thick. What is the concrete volume, with no waste allowance?
A wall is 80 feet long, 10 feet high, and 8 inches thick. What is the concrete volume, with no waste?
A continuous footing is 80 feet long, 2 feet wide, and 2 feet thick. The contractor will add an 8 percent waste factor. How many cubic yards should be ordered?
Under the 2021 IBC minimum slab provisions, concrete floor slabs supported directly on the ground shall be not less than:
When an IBC vapor retarder is required under a slab-on-ground, the polyethylene sheet is at least 6 mils thick and joints are lapped not less than:
The ASTM C143 slump cone has which nominal dimensions?
In the ASTM C143 slump test, the cone is filled in how many layers, and each layer is rodded how many times?
A slump cone is filled and lifted according to ASTM C143. The concrete stands 8-1/4 inches high after the cone is removed. What slump should be recorded?
A mix uses 564 pounds of cement per cubic yard at a water-cement ratio of 0.45 by weight. How much water is in one cubic yard, ignoring aggregate moisture?
The Contractor’s Guide / ASTM C94 discharge rule used on this open-book exam requires ready-mixed concrete to be discharged within which limit unless the purchaser waives it?
When may water be added to a ready-mixed truck at the jobsite?
ACI 306 treats concrete as being placed in cold weather when the air temperature is at or expected to fall below what value during the protection period?
Hot-weather concreting (ACI 305) most directly increases the risk of which fresh-concrete distress?
Air-entraining admixture is specified primarily to improve which concrete property?
Acceptance of specified compressive strength is based primarily on cylinders made and cured under which standards?
Which practice matches ACI 309 consolidation of ordinary vibratable concrete?
Using the common 24-to-36-times-thickness rule, contraction joints in a 5-inch unreinforced slab-on-ground should be spaced about:
Saw-cut contraction joints in a slab-on-ground are commonly cut to a depth of about:
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