AR CL Concrete Leveling Contractor
Exam Practice Questions And Correct
Answers (Verified Answers) Plus
Rationales 2027 Q&A | Instant
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Question 1
What is the primary purpose of concrete leveling?
A. To increase the concrete's compressive strength
B. To restore a slab to a desired elevation and improve support
C. To change concrete color
D. To eliminate all existing joints
Answer: B. To restore a slab to a desired elevation and improve support
Rationale: Concrete leveling is primarily intended to raise or stabilize
settled concrete and restore proper elevation, drainage, access, and
serviceability.
,Question 2
Which condition is commonly responsible for settlement of a concrete slab?
A. Excessive surface paint
B. Loss or consolidation of supporting soil
C. Properly compacted base material
D. Expansion joint installation
Answer: B. Loss or consolidation of supporting soil
Rationale: Settlement often occurs when underlying soil consolidates,
erodes, washes away, or otherwise loses the capacity to support the slab.
Question 3
Before beginning a concrete leveling project, what should the contractor do
first?
A. Drill holes immediately
B. Inspect and evaluate the slab and surrounding conditions
C. Apply sealant to every joint
D. Remove the entire slab
Answer: B. Inspect and evaluate the slab and surrounding conditions
,Rationale: A site assessment helps identify settlement, cracking, drainage
problems, utilities, voids, slab thickness, and other conditions that affect
the leveling method.
Question 4
Which instrument is commonly used to determine differences in elevation?
A. Pipe wrench
B. Level or laser level
C. Hammer
D. Concrete saw
Answer: B. Level or laser level
Rationale: Levels and laser levels provide accurate elevation references
needed to determine how much a slab has settled and how much it needs
to be raised.
Question 5
What is a major advantage of polyurethane foam leveling?
A. It requires complete slab removal
B. It can use relatively small injection holes
C. It always requires heavy excavation
D. It prevents every future settlement problem
, Answer: B. It can use relatively small injection holes
Rationale: Polyurethane injection systems commonly use small drilled
access holes and can provide lifting and void filling with limited surface
disturbance.
Question 6
Traditional mudjacking generally involves injecting what material beneath a
concrete slab?
A. Hydraulic oil
B. Cementitious slurry
C. Asphalt emulsion only
D. Dry sand only
Answer: B. Cementitious slurry
Rationale: Traditional mudjacking uses a pumpable cementitious or soil-
cement slurry injected beneath the slab to fill voids and lift the concrete.
Question 7
What is a primary purpose of filling voids beneath a settled slab?
A. To reduce structural support
B. To provide more uniform support beneath the slab
Exam Practice Questions And Correct
Answers (Verified Answers) Plus
Rationales 2027 Q&A | Instant
Download Pdf
Question 1
What is the primary purpose of concrete leveling?
A. To increase the concrete's compressive strength
B. To restore a slab to a desired elevation and improve support
C. To change concrete color
D. To eliminate all existing joints
Answer: B. To restore a slab to a desired elevation and improve support
Rationale: Concrete leveling is primarily intended to raise or stabilize
settled concrete and restore proper elevation, drainage, access, and
serviceability.
,Question 2
Which condition is commonly responsible for settlement of a concrete slab?
A. Excessive surface paint
B. Loss or consolidation of supporting soil
C. Properly compacted base material
D. Expansion joint installation
Answer: B. Loss or consolidation of supporting soil
Rationale: Settlement often occurs when underlying soil consolidates,
erodes, washes away, or otherwise loses the capacity to support the slab.
Question 3
Before beginning a concrete leveling project, what should the contractor do
first?
A. Drill holes immediately
B. Inspect and evaluate the slab and surrounding conditions
C. Apply sealant to every joint
D. Remove the entire slab
Answer: B. Inspect and evaluate the slab and surrounding conditions
,Rationale: A site assessment helps identify settlement, cracking, drainage
problems, utilities, voids, slab thickness, and other conditions that affect
the leveling method.
Question 4
Which instrument is commonly used to determine differences in elevation?
A. Pipe wrench
B. Level or laser level
C. Hammer
D. Concrete saw
Answer: B. Level or laser level
Rationale: Levels and laser levels provide accurate elevation references
needed to determine how much a slab has settled and how much it needs
to be raised.
Question 5
What is a major advantage of polyurethane foam leveling?
A. It requires complete slab removal
B. It can use relatively small injection holes
C. It always requires heavy excavation
D. It prevents every future settlement problem
, Answer: B. It can use relatively small injection holes
Rationale: Polyurethane injection systems commonly use small drilled
access holes and can provide lifting and void filling with limited surface
disturbance.
Question 6
Traditional mudjacking generally involves injecting what material beneath a
concrete slab?
A. Hydraulic oil
B. Cementitious slurry
C. Asphalt emulsion only
D. Dry sand only
Answer: B. Cementitious slurry
Rationale: Traditional mudjacking uses a pumpable cementitious or soil-
cement slurry injected beneath the slab to fill voids and lift the concrete.
Question 7
What is a primary purpose of filling voids beneath a settled slab?
A. To reduce structural support
B. To provide more uniform support beneath the slab
