AR BC-R Residential Building Contractor
Exam Practice Questions And Correct
Answers (Verified Answers) Plus
Rationales 2027 Q&A | Instant
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1.
What is the primary purpose of a footing beneath a residential foundation
wall?
A. To provide insulation
B. To support roof loads
C. To distribute foundation loads over the soil
D. To prevent termite entry
Answer: C. To distribute foundation loads over the soil
Rationale: Footings spread structural loads over a larger soil area,
reducing bearing pressure and helping prevent excessive settlement.
,2.
Which soil condition generally provides the greatest bearing capacity for a
typical residential foundation?
A. Loose organic soil
B. Uncompacted fill
C. Dense, well-compacted granular soil
D. Saturated peat
Answer: C. Dense, well-compacted granular soil
Rationale: Dense, properly compacted soils generally provide better
support and less settlement than loose or organic soils.
3.
What is the primary purpose of a vapor retarder beneath a concrete slab-on-
grade?
A. Increase concrete strength
B. Reduce moisture migration through the slab
C. Replace slab reinforcement
D. Prevent concrete shrinkage
Answer: B. Reduce moisture migration through the slab
,Rationale: A properly installed vapor retarder helps limit moisture
movement from the ground into the concrete slab and finished space.
4.
Which material is commonly used for residential foundation drainage?
A. Perforated drainage pipe
B. Solid copper tubing
C. Flexible gas tubing
D. Unperforated electrical conduit
Answer: A. Perforated drainage pipe
Rationale: Perforated drainage pipe collects groundwater around the
foundation and conveys it to an appropriate discharge or drainage system.
5.
Why is reinforcing steel placed in concrete?
A. To increase its tensile capacity
B. To eliminate the need for curing
C. To make concrete waterproof
D. To reduce concrete weight
Answer: A. To increase its tensile capacity
, Rationale: Concrete performs well in compression but poorly in tension.
Reinforcing steel helps resist tensile and flexural stresses.
6.
What is the primary purpose of properly compacting concrete?
A. Increase air content
B. Remove unnecessary entrapped air and improve consolidation
C. Reduce cement content
D. Eliminate curing requirements
Answer: B. Remove unnecessary entrapped air and improve consolidation
Rationale: Proper consolidation improves contact around reinforcement
and reduces voids, honeycombing, and weak areas.
7.
What is the primary function of anchor bolts connecting a wood sill plate to
a concrete foundation?
A. Provide roof ventilation
B. Secure the sill plate to the foundation
C. Support drywall
D. Drain foundation water
Answer: B. Secure the sill plate to the foundation
Exam Practice Questions And Correct
Answers (Verified Answers) Plus
Rationales 2027 Q&A | Instant
Download Pdf
1.
What is the primary purpose of a footing beneath a residential foundation
wall?
A. To provide insulation
B. To support roof loads
C. To distribute foundation loads over the soil
D. To prevent termite entry
Answer: C. To distribute foundation loads over the soil
Rationale: Footings spread structural loads over a larger soil area,
reducing bearing pressure and helping prevent excessive settlement.
,2.
Which soil condition generally provides the greatest bearing capacity for a
typical residential foundation?
A. Loose organic soil
B. Uncompacted fill
C. Dense, well-compacted granular soil
D. Saturated peat
Answer: C. Dense, well-compacted granular soil
Rationale: Dense, properly compacted soils generally provide better
support and less settlement than loose or organic soils.
3.
What is the primary purpose of a vapor retarder beneath a concrete slab-on-
grade?
A. Increase concrete strength
B. Reduce moisture migration through the slab
C. Replace slab reinforcement
D. Prevent concrete shrinkage
Answer: B. Reduce moisture migration through the slab
,Rationale: A properly installed vapor retarder helps limit moisture
movement from the ground into the concrete slab and finished space.
4.
Which material is commonly used for residential foundation drainage?
A. Perforated drainage pipe
B. Solid copper tubing
C. Flexible gas tubing
D. Unperforated electrical conduit
Answer: A. Perforated drainage pipe
Rationale: Perforated drainage pipe collects groundwater around the
foundation and conveys it to an appropriate discharge or drainage system.
5.
Why is reinforcing steel placed in concrete?
A. To increase its tensile capacity
B. To eliminate the need for curing
C. To make concrete waterproof
D. To reduce concrete weight
Answer: A. To increase its tensile capacity
, Rationale: Concrete performs well in compression but poorly in tension.
Reinforcing steel helps resist tensile and flexural stresses.
6.
What is the primary purpose of properly compacting concrete?
A. Increase air content
B. Remove unnecessary entrapped air and improve consolidation
C. Reduce cement content
D. Eliminate curing requirements
Answer: B. Remove unnecessary entrapped air and improve consolidation
Rationale: Proper consolidation improves contact around reinforcement
and reduces voids, honeycombing, and weak areas.
7.
What is the primary function of anchor bolts connecting a wood sill plate to
a concrete foundation?
A. Provide roof ventilation
B. Secure the sill plate to the foundation
C. Support drywall
D. Drain foundation water
Answer: B. Secure the sill plate to the foundation
