Free Concrete (C-8) practice test

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10 questions from the Peerless Institute C-8 Concrete exam. Covers mix design, curing, compressive strength, and forming calculations.

0 of 10 answered
  1. 1In welded smooth wire fabric where the yield strength exceeds 60,000 psi, the welded intersections shall not be spaced farther apart than ________ in direction of calculated stress.

  2. 2Ramps for wheelbarrows _____ feet high shall be at least 2 feet 6 inches in width, firmly cleated together and secured at each end to prevent ramp from sliding.

  3. 3Ramps and runways that are over 3 feet high and that are used for wheelbarrows and hand buggies must be at least how wide?

  4. 4When slump is not written as a maximum or not to exceed requirement, a specified slump of 4 inches has a tolerance of plus or minus:

  5. 5When slump is not written as a maximum, a specified slump of 5 in. has a tolerance of plus or minus:

  6. 6Depressions in floors between high spots must not be greater than ________________ below a 10 ft. straight edge on a Class AA Surface Finish Tolerance.

  7. 7Inclined walkways for working persons to walk upon must be 20 inches wide and supported to prevent spring action. Cleats shall be securely fastened on such runways not more than ____ inches apart.

  8. 8A concrete specification calls for: air-entrained concrete; 28 day compressive strength of 4,000 psi; 3 to 4 in. slump; 1 in. maximum size coarse aggregate. What would the estimated cement content be?

  9. 9According to the building code, foundation walls must extend at least how many inches above the finish grade adjacent to the wall at all points when the house is built with wood floor joist & wood floor?

  10. 10Planked floors will consist of planks tightly laid together of standard grade lumber, not less than ____ inches thick.