ACI FLATWORK EXAM 2 2026 FINAL PAPER
COMPLETE QUESTIONS AND ANSWERS FULL
SOLUTION
◉ Concrete made with portland cement will set and harden while
under water.
Answer: True
◉ If a concrete slab on ground won't be exposed to sulfates, the
cement used is most likely to be:
Answer: Type I
◉ Most concrete used in slabs on ground has coarse aggregate with
a maximum size of:
Answer: 3/4 to 1 1/2 in.
◉ Sand for concrete used in slabs on ground is easier to finish when
it has close to the largest allowable amount of material passing the
No. 50 and No. 100 sieve.
Answer: True
,◉ Increasing the amount of sand in a concrete usually decreases the
amount of water needed to make the concrete workable.
Answer: False
◉ All concrete that will be subject to freezing when moist or be
exposed the deicing salts should contain:
Answer: an air-entraining agent
◉ Strength of normal weight concrete depends mainly on:
Answer: water-cement ratio
◉ Overhanded concrete mixtures are likely to produce floors with
poor wear resistance and excessive shrinkage.
Answer: True
◉ To minimize shrinkage and reduce cracking and curling:
Answer: use as much coarse aggregate as possible, use as little
mixing water as possible, and use aggregates with low shrinkage
◉ Changes in concrete slump most often represent changes in the
amount of ______ in the mixture.
Answer: water
, ◉ Air-entrained concrete is not recommended for use in concrete
slabs:
Answer: finished by repeated steel troweling passes
◉ Changes in concrete temperatures affect:
Answer: setting time, air content, and slump
◉ To determine if concrete, in place, has the strength needed to put
it into service, test cylinders should be:
Answer: kept at the job site and cured under conditions similar to
the curing conditions for the concrete the represent
◉ Granular sub basses for slabs on ground can be compacted with
sheepsfoot rollers.
Answer: False
◉ In cold weather, the sub grade soil must be free of ______ before
concrete placing begins.
Answer: frost
◉ Before a concrete slab on ground is placed under severe drying
conditions that threaten plastic shrinkage cracking, water should be
sprayed on the sub grade until puddles are formed and the surface is
soft.
COMPLETE QUESTIONS AND ANSWERS FULL
SOLUTION
◉ Concrete made with portland cement will set and harden while
under water.
Answer: True
◉ If a concrete slab on ground won't be exposed to sulfates, the
cement used is most likely to be:
Answer: Type I
◉ Most concrete used in slabs on ground has coarse aggregate with
a maximum size of:
Answer: 3/4 to 1 1/2 in.
◉ Sand for concrete used in slabs on ground is easier to finish when
it has close to the largest allowable amount of material passing the
No. 50 and No. 100 sieve.
Answer: True
,◉ Increasing the amount of sand in a concrete usually decreases the
amount of water needed to make the concrete workable.
Answer: False
◉ All concrete that will be subject to freezing when moist or be
exposed the deicing salts should contain:
Answer: an air-entraining agent
◉ Strength of normal weight concrete depends mainly on:
Answer: water-cement ratio
◉ Overhanded concrete mixtures are likely to produce floors with
poor wear resistance and excessive shrinkage.
Answer: True
◉ To minimize shrinkage and reduce cracking and curling:
Answer: use as much coarse aggregate as possible, use as little
mixing water as possible, and use aggregates with low shrinkage
◉ Changes in concrete slump most often represent changes in the
amount of ______ in the mixture.
Answer: water
, ◉ Air-entrained concrete is not recommended for use in concrete
slabs:
Answer: finished by repeated steel troweling passes
◉ Changes in concrete temperatures affect:
Answer: setting time, air content, and slump
◉ To determine if concrete, in place, has the strength needed to put
it into service, test cylinders should be:
Answer: kept at the job site and cured under conditions similar to
the curing conditions for the concrete the represent
◉ Granular sub basses for slabs on ground can be compacted with
sheepsfoot rollers.
Answer: False
◉ In cold weather, the sub grade soil must be free of ______ before
concrete placing begins.
Answer: frost
◉ Before a concrete slab on ground is placed under severe drying
conditions that threaten plastic shrinkage cracking, water should be
sprayed on the sub grade until puddles are formed and the surface is
soft.
