FCC Concrete & Masonry Construction

Question 1

What is the minimum compressive strength (f'c) typically specified for residential concrete footings in Florida per the Florida Building Code?

Accepted Answer

2,500 psi

Answer

2,000 psi

Answer

3,000 psi

Answer

4,000 psi

Question 2

When testing concrete for slump, what does a higher slump value indicate about the concrete mix?

Accepted Answer

Higher workability and water content

Answer

Greater compressive strength

Answer

Lower water-cement ratio

Answer

Better air entrainment

Question 3

In Florida's coastal environment, which type of cement is most commonly specified to resist sulfate attack in soils and groundwater?

Accepted Answer

Type V Portland cement

Answer

Type I Portland cement

Answer

Type II Portland cement

Answer

Type III Portland cement

Question 4

What is the minimum concrete cover required for reinforcing steel in a concrete slab exposed to earth or weather per ACI 318?

Accepted Answer

1.5 inches

Answer

3/4 inch

Answer

1 inch

Answer

2 inches

Question 5

Which masonry unit type has the highest compressive strength rating and is commonly used for load-bearing walls in Florida construction?

Accepted Answer

Grade N concrete masonry units

Answer

Grade S concrete masonry units

Answer

Hollow clay brick

Answer

Autoclaved aerated concrete (AAC) block

Question 6

According to ASTM standards, what is the maximum allowable absorption rate for a Grade SW (severe weathering) brick?

Accepted Answer

22%

Answer

8%

Answer

12%

Answer

17%

Question 7

When placing concrete in hot weather conditions (above 90°F), which of the following is the most effective method to reduce mix temperature?

Accepted Answer

Using chilled water or ice to replace part of the mix water

Answer

Adding extra cement to the mix

Answer

Increasing the water-cement ratio

Answer

Using Type III cement for faster set