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

The Florida Building Code requires a minimum compressive strength of 2,500 psi for residential concrete footings to ensure adequate structural support.

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

A higher slump value indicates more workability due to a higher water content, which generally reduces the final compressive strength of the concrete.

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 V Portland cement provides high sulfate resistance and is specified in aggressive sulfate exposure conditions common in Florida's coastal soils and groundwater.

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

ACI 318 requires a minimum of 1.5 inches of concrete cover for #5 bars and smaller in slabs exposed to weather to protect the reinforcement from corrosion.

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 N concrete masonry units have the highest compressive strength and are suitable for use above and below grade in exterior and interior walls.

(FCC) Florida Certified Contractors Practice Test

(FCC) Florida Certified Contractors Practice Test

FCC Concrete & Masonry Construction