Florida Concrete Construction Exam
Practice Questions And Correct Answers
(Verified Answers) Plus Rationale 2026
Q&A| Instant Download Pdf
1. During placement of a reinforced concrete slab-on-grade for a
commercial warehouse in Florida’s humid coastal climate, a contractor
notices rapid moisture evaporation and surface crusting while bleed
water is still present beneath the surface. If finishing operations
proceed too early under these conditions, which defect is most likely
to occur due to trapped water and improper consolidation of the
surface layer?
A. Delayed ettringite formation
B. Plastic settlement cracking
C. Surface blistering and delamination
D. Alkali-silica expansion
,C. Surface blistering and delamination
Improper finishing before bleed water evaporates traps moisture and air
beneath the surface, creating thin layers that separate and form blisters or
delaminated concrete. Florida’s warm temperatures and wind accelerate
evaporation, increasing this risk during slab finishing operations.
2. A Florida contractor is preparing a concrete mix for structural columns
exposed to chlorides in a marine environment. Which combination of
concrete properties is most critical for reducing long-term
reinforcement corrosion and permeability?
A. High slump and low cement content
B. Low water-cement ratio and proper air entrainment
C. High fly ash replacement and excessive water addition
D. Increased aggregate size and low curing time
B. Low water-cement ratio and proper air entrainment
A low water-cement ratio reduces permeability and limits chloride
intrusion that can corrode reinforcing steel. Properly entrained air also
improves durability by creating microscopic voids that accommodate
moisture movement and environmental stresses.
3. During inspection of a reinforced concrete beam formwork system,
the project superintendent discovers that shores were removed
, before the concrete achieved its required design strength. What is the
greatest structural concern associated with premature shoring
removal?
A. Increased cement hydration rate
B. Excessive carbonation of concrete
C. Deflection and possible structural cracking
D. Reduced aggregate interlock at joints
C. Deflection and possible structural cracking
Concrete must achieve sufficient strength before carrying design loads.
Premature removal of shores can cause excessive deflection, cracking, or
even partial structural failure because the member may not yet support its
own weight and construction loads safely.
4. Which statement best describes the primary purpose of control joints
in concrete pavement construction?
A. To increase reinforcement bond strength
B. To prevent all forms of cracking
C. To induce cracking at predetermined locations
D. To improve compressive strength development
C. To induce cracking at predetermined locations
, Concrete naturally shrinks as it cures. Control joints create weakened
planes that encourage cracks to form in straight, controlled locations
rather than randomly throughout the slab.
5. A concrete technician performing a slump test obtains a result
significantly higher than specified for a structural footing mix. Which
condition is most likely responsible for this excessive slump?
A. Low aggregate moisture content
B. Excessive water added to the mix
C. Increased cement fineness
D. Reduced ambient temperature during batching
B. Excessive water added to the mix
Adding excess water increases workability and slump but weakens the
concrete by raising the water-cement ratio. This can reduce strength,
durability, and resistance to environmental deterioration.
6. In Florida highway construction, dowel bars are commonly installed
across transverse joints in concrete pavements primarily to:
A. Reduce slab thickness requirements
B. Transfer wheel loads between adjacent slabs
C. Eliminate the need for reinforcement
D. Prevent plastic shrinkage cracking
Practice Questions And Correct Answers
(Verified Answers) Plus Rationale 2026
Q&A| Instant Download Pdf
1. During placement of a reinforced concrete slab-on-grade for a
commercial warehouse in Florida’s humid coastal climate, a contractor
notices rapid moisture evaporation and surface crusting while bleed
water is still present beneath the surface. If finishing operations
proceed too early under these conditions, which defect is most likely
to occur due to trapped water and improper consolidation of the
surface layer?
A. Delayed ettringite formation
B. Plastic settlement cracking
C. Surface blistering and delamination
D. Alkali-silica expansion
,C. Surface blistering and delamination
Improper finishing before bleed water evaporates traps moisture and air
beneath the surface, creating thin layers that separate and form blisters or
delaminated concrete. Florida’s warm temperatures and wind accelerate
evaporation, increasing this risk during slab finishing operations.
2. A Florida contractor is preparing a concrete mix for structural columns
exposed to chlorides in a marine environment. Which combination of
concrete properties is most critical for reducing long-term
reinforcement corrosion and permeability?
A. High slump and low cement content
B. Low water-cement ratio and proper air entrainment
C. High fly ash replacement and excessive water addition
D. Increased aggregate size and low curing time
B. Low water-cement ratio and proper air entrainment
A low water-cement ratio reduces permeability and limits chloride
intrusion that can corrode reinforcing steel. Properly entrained air also
improves durability by creating microscopic voids that accommodate
moisture movement and environmental stresses.
3. During inspection of a reinforced concrete beam formwork system,
the project superintendent discovers that shores were removed
, before the concrete achieved its required design strength. What is the
greatest structural concern associated with premature shoring
removal?
A. Increased cement hydration rate
B. Excessive carbonation of concrete
C. Deflection and possible structural cracking
D. Reduced aggregate interlock at joints
C. Deflection and possible structural cracking
Concrete must achieve sufficient strength before carrying design loads.
Premature removal of shores can cause excessive deflection, cracking, or
even partial structural failure because the member may not yet support its
own weight and construction loads safely.
4. Which statement best describes the primary purpose of control joints
in concrete pavement construction?
A. To increase reinforcement bond strength
B. To prevent all forms of cracking
C. To induce cracking at predetermined locations
D. To improve compressive strength development
C. To induce cracking at predetermined locations
, Concrete naturally shrinks as it cures. Control joints create weakened
planes that encourage cracks to form in straight, controlled locations
rather than randomly throughout the slab.
5. A concrete technician performing a slump test obtains a result
significantly higher than specified for a structural footing mix. Which
condition is most likely responsible for this excessive slump?
A. Low aggregate moisture content
B. Excessive water added to the mix
C. Increased cement fineness
D. Reduced ambient temperature during batching
B. Excessive water added to the mix
Adding excess water increases workability and slump but weakens the
concrete by raising the water-cement ratio. This can reduce strength,
durability, and resistance to environmental deterioration.
6. In Florida highway construction, dowel bars are commonly installed
across transverse joints in concrete pavements primarily to:
A. Reduce slab thickness requirements
B. Transfer wheel loads between adjacent slabs
C. Eliminate the need for reinforcement
D. Prevent plastic shrinkage cracking
