Proven ACI Flatwork Prep for 2025 – Pass on
Your First Try
When is air-entrained concrete used? - CORRECT ANSWER✔✔When it will be exposed to freezing and
thawing cycles
How is concrete sold? Sold in what units? - CORRECT ANSWER✔✔By volume in cubic yards or cubic
meters
Concrete should be completely discharged: - CORRECT ANSWER✔✔Within 1 1/2 hours
Who should attend the pre-construction meeting? - CORRECT ANSWER✔✔Finisher foreman
Type I Concrete - CORRECT ANSWER✔✔Normal or ordinary use
What is type I concrete typically used on? - CORRECT ANSWER✔✔Slab-on grade, reinforced concrete
buildings, and bridges
Type II Concrete - CORRECT ANSWER✔✔Moderate sulfate resistance
Where is type II concrete used? - CORRECT ANSWER✔✔Where moderate sulfate exposure from the soil
or groundwater must be resisted
, Type III Concrete - CORRECT ANSWER✔✔High early strength
Type III Concrete Properties - CORRECT ANSWER✔✔Similar to Type I, but more finely ground, quick,
develops in a week or less.
Type IV Concrete - CORRECT ANSWER✔✔Low heat of hydration
When is Type IV Concrete used? - CORRECT ANSWER✔✔In mass concrete structures like dams
Type V Concrete - CORRECT ANSWER✔✔High sulfate resistance
When to use Type V concrete? - CORRECT ANSWER✔✔When soil or groundwater has high sulfate
resistance
Fine aggregate - CORRECT ANSWER✔✔Particles are smaller 3/8" - either natural sand or manufactured
sand
Coarse aggregate - CORRECT ANSWER✔✔Most of particles are bigger than 1/4" - either gravel or
crushed materials; gravel= smoothly rounded particles & crushed stone= rough angular surfaces
What is concrete made without coarse aggregate? - CORRECT ANSWER✔✔Motar or grout
What do accelerating admixtures do? - CORRECT ANSWER✔✔Speed up setting/ hardening time
Where are accelerating admixtures useful? - CORRECT ANSWER✔✔In cold weather
Your First Try
When is air-entrained concrete used? - CORRECT ANSWER✔✔When it will be exposed to freezing and
thawing cycles
How is concrete sold? Sold in what units? - CORRECT ANSWER✔✔By volume in cubic yards or cubic
meters
Concrete should be completely discharged: - CORRECT ANSWER✔✔Within 1 1/2 hours
Who should attend the pre-construction meeting? - CORRECT ANSWER✔✔Finisher foreman
Type I Concrete - CORRECT ANSWER✔✔Normal or ordinary use
What is type I concrete typically used on? - CORRECT ANSWER✔✔Slab-on grade, reinforced concrete
buildings, and bridges
Type II Concrete - CORRECT ANSWER✔✔Moderate sulfate resistance
Where is type II concrete used? - CORRECT ANSWER✔✔Where moderate sulfate exposure from the soil
or groundwater must be resisted
, Type III Concrete - CORRECT ANSWER✔✔High early strength
Type III Concrete Properties - CORRECT ANSWER✔✔Similar to Type I, but more finely ground, quick,
develops in a week or less.
Type IV Concrete - CORRECT ANSWER✔✔Low heat of hydration
When is Type IV Concrete used? - CORRECT ANSWER✔✔In mass concrete structures like dams
Type V Concrete - CORRECT ANSWER✔✔High sulfate resistance
When to use Type V concrete? - CORRECT ANSWER✔✔When soil or groundwater has high sulfate
resistance
Fine aggregate - CORRECT ANSWER✔✔Particles are smaller 3/8" - either natural sand or manufactured
sand
Coarse aggregate - CORRECT ANSWER✔✔Most of particles are bigger than 1/4" - either gravel or
crushed materials; gravel= smoothly rounded particles & crushed stone= rough angular surfaces
What is concrete made without coarse aggregate? - CORRECT ANSWER✔✔Motar or grout
What do accelerating admixtures do? - CORRECT ANSWER✔✔Speed up setting/ hardening time
Where are accelerating admixtures useful? - CORRECT ANSWER✔✔In cold weather
