Concrete Floor Systems Design Guide - Quiz

Quiz Question

1. Vapor barriers and vapor retarders are used to ____________ moisture and vapor transmission.
Minimize
Maximize
Not affect
None of the above
2. In unreinforced slabs, contraction joints should be spaced in feet, 2 – 3 times the slab thickness up to a maximum of _____ ft.
5
10
18
25
3. For interior industrial slabs, air entrainment ______ desirable because of adverse effects on finishability and difficulty in applying surface hardeners.
Is
Is not
4. Synthetic micro-fibers, polypropylene and nylon, are most widely used to the formation of plastic shrinkage cracks and to hold cracks tight.
Increase
Reduce
5. Which of the following is not a benefit of modern admixtures?
Water Reduction
Paste Reduction
Reduced Shrinkage
Decreased Resistance
6. Dry shake hardeners provide __________ times the abrasion resistance of plain, cured concrete.
1 to 3
2 to 8
9 to 10
None of the above
7. ______________ is the process of maintaining a sufficient amount of moisture in the concrete to promote proper cement hydration and strength gain.
Draining
Curing
Welding
Poring
8. Joint sealants are ___________ materials that expand and contract along with the concrete.
Flexible
Hard
Liquid
Brittle
9. Concrete of any age must be properly prepared __________ application of a coating.
After
Prior to
10. Membrane forming curing and sealing compounds __________ be used on floors to receive non-breathable coatings.
Should
Should not