AR BD Bridge Construction 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 bridge foundation?
A. Provide a finished riding surface
B. Transfer structural loads safely to the supporting soil or rock
C. Reduce the width of the bridge
D. Eliminate the need for reinforcement
Answer: B. Transfer structural loads safely to the supporting soil or rock
Rationale: The foundation transfers dead loads, live loads, and other
structural forces into the ground while maintaining acceptable settlement
and stability.
2. Which type of foundation is commonly used when competent bearing
material is located deep below the ground surface?
, A. Shallow spread footing
B. Slab-on-grade
C. Deep foundation
D. Pavement base
Answer: C. Deep foundation
Rationale: Deep foundations such as piles and drilled shafts transfer loads
to deeper, stronger soil or rock strata when shallow soils are inadequate.
3. What is the main function of reinforcing steel in a reinforced concrete
bridge member?
A. Resist tensile stresses
B. Prevent all concrete shrinkage
C. Replace the concrete
D. Increase concrete workability
Answer: A. Resist tensile stresses
Rationale: Concrete is strong in compression but relatively weak in tension,
so reinforcing steel is provided to resist tensile forces and control cracking.
4. What does concrete slump primarily measure?
A. Compressive strength
B. Air content
, C. Consistency or workability
D. Cement content
Answer: C. Consistency or workability
Rationale: The slump test provides an indication of fresh concrete
consistency and workability before placement.
5. Which factor generally has the greatest effect on concrete strength
when other materials are properly selected?
A. Water-cement ratio
B. Form color
C. Aggregate shape alone
D. Delivery truck size
Answer: A. Water-cement ratio
Rationale: A lower water-cement ratio generally produces stronger, more
durable concrete when the mixture is properly proportioned, placed, and
cured.
6. Why is concrete curing important?
A. It removes all reinforcement
B. It promotes hydration and development of strength
C. It increases the water-cement ratio
D. It eliminates the need for finishing
, Answer: B. It promotes hydration and development of strength
Rationale: Proper curing maintains suitable moisture and temperature
conditions so cement hydration can continue and the concrete can develop
strength and durability.
7. What is concrete cover over reinforcing steel primarily intended to
provide?
A. Decorative appearance
B. Protection against corrosion and adequate bond
C. Easier demolition
D. Increased concrete slump
Answer: B. Protection against corrosion and adequate bond
Rationale: Adequate concrete cover protects reinforcement from
environmental exposure and contributes to proper development and
anchorage of the reinforcing steel.
8. What is the purpose of a construction joint in concrete?
A. Provide a planned location where concrete placement can be
interrupted
B. Eliminate reinforcement
C. Increase concrete temperature
D. Replace expansion joints
Exam Practice Questions And Correct
Answers (Verified Answers) Plus
Rationales 2027 Q&A | Instant
Download Pdf
1. What is the primary purpose of a bridge foundation?
A. Provide a finished riding surface
B. Transfer structural loads safely to the supporting soil or rock
C. Reduce the width of the bridge
D. Eliminate the need for reinforcement
Answer: B. Transfer structural loads safely to the supporting soil or rock
Rationale: The foundation transfers dead loads, live loads, and other
structural forces into the ground while maintaining acceptable settlement
and stability.
2. Which type of foundation is commonly used when competent bearing
material is located deep below the ground surface?
, A. Shallow spread footing
B. Slab-on-grade
C. Deep foundation
D. Pavement base
Answer: C. Deep foundation
Rationale: Deep foundations such as piles and drilled shafts transfer loads
to deeper, stronger soil or rock strata when shallow soils are inadequate.
3. What is the main function of reinforcing steel in a reinforced concrete
bridge member?
A. Resist tensile stresses
B. Prevent all concrete shrinkage
C. Replace the concrete
D. Increase concrete workability
Answer: A. Resist tensile stresses
Rationale: Concrete is strong in compression but relatively weak in tension,
so reinforcing steel is provided to resist tensile forces and control cracking.
4. What does concrete slump primarily measure?
A. Compressive strength
B. Air content
, C. Consistency or workability
D. Cement content
Answer: C. Consistency or workability
Rationale: The slump test provides an indication of fresh concrete
consistency and workability before placement.
5. Which factor generally has the greatest effect on concrete strength
when other materials are properly selected?
A. Water-cement ratio
B. Form color
C. Aggregate shape alone
D. Delivery truck size
Answer: A. Water-cement ratio
Rationale: A lower water-cement ratio generally produces stronger, more
durable concrete when the mixture is properly proportioned, placed, and
cured.
6. Why is concrete curing important?
A. It removes all reinforcement
B. It promotes hydration and development of strength
C. It increases the water-cement ratio
D. It eliminates the need for finishing
, Answer: B. It promotes hydration and development of strength
Rationale: Proper curing maintains suitable moisture and temperature
conditions so cement hydration can continue and the concrete can develop
strength and durability.
7. What is concrete cover over reinforcing steel primarily intended to
provide?
A. Decorative appearance
B. Protection against corrosion and adequate bond
C. Easier demolition
D. Increased concrete slump
Answer: B. Protection against corrosion and adequate bond
Rationale: Adequate concrete cover protects reinforcement from
environmental exposure and contributes to proper development and
anchorage of the reinforcing steel.
8. What is the purpose of a construction joint in concrete?
A. Provide a planned location where concrete placement can be
interrupted
B. Eliminate reinforcement
C. Increase concrete temperature
D. Replace expansion joints
