Minnesota Reinforced Concrete Special
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Rationales 2026 Q&A | Instant
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1. What is the primary purpose of reinforcement in concrete?
A. Increase concrete density
B. Reduce cement content
C. Improve resistance to tensile forces
D. Increase slump
Answer: C. Improve resistance to tensile forces
Rationale: Concrete is strong in compression but weak in tension.
Reinforcing steel provides the tensile strength needed in structural
members.
, 2. Which code primarily governs structural concrete construction and
inspection?
A. International Plumbing Code
B. ACI 318
C. National Electrical Code
D. International Fuel Gas Code
Answer: B. ACI 318
Rationale: ACI 318 establishes requirements for design, construction, and
inspection of structural concrete.
3. What is the minimum clear cover typically required for reinforcement
cast against and permanently exposed to earth?
A. 1 inch
B. 1½ inches
C. 2 inches
D. 3 inches
Answer: D. 3 inches
Rationale: Reinforcement cast directly against earth generally requires 3
inches of concrete cover for durability and corrosion protection.
4. What is the primary purpose of concrete cover over reinforcing steel?
,A. Reduce weight
B. Improve workability
C. Protect reinforcement from corrosion and fire
D. Increase slump
Answer: C. Protect reinforcement from corrosion and fire
Rationale: Adequate cover shields steel from environmental exposure and
enhances fire resistance.
5. Which test is commonly used to measure concrete consistency in the
field?
A. Compression test
B. Slump test
C. Tensile test
D. Flexural test
Answer: B. Slump test
Rationale: The slump test measures the consistency and workability of
fresh concrete.
6. What is the standard cylinder size commonly used for concrete
compressive strength testing?
, A. 2 in. × 4 in.
B. 3 in. × 6 in.
C. 4 in. × 8 in.
D. 6 in. × 12 in.
Answer: D. 6 in. × 12 in.
Rationale: The traditional ASTM cylinder size is 6 inches by 12 inches,
although 4-inch by 8-inch cylinders are also permitted.
7. Reinforcing bars are identified by bar numbers representing:
A. Length in feet
B. Weight per foot
C. Nominal diameter in eighths of an inch
D. Yield strength
Answer: C. Nominal diameter in eighths of an inch
Rationale: A No. 8 bar has a nominal diameter of 8/8 inch or 1 inch.
8. What is the typical minimum yield strength for Grade 60 reinforcing
steel?
A. 40,000 psi
B. 50,000 psi
Inspector Exam Practice Questions And
Correct Answers (Verified Answers) Plus
Rationales 2026 Q&A | Instant
Download Pdf
1. What is the primary purpose of reinforcement in concrete?
A. Increase concrete density
B. Reduce cement content
C. Improve resistance to tensile forces
D. Increase slump
Answer: C. Improve resistance to tensile forces
Rationale: Concrete is strong in compression but weak in tension.
Reinforcing steel provides the tensile strength needed in structural
members.
, 2. Which code primarily governs structural concrete construction and
inspection?
A. International Plumbing Code
B. ACI 318
C. National Electrical Code
D. International Fuel Gas Code
Answer: B. ACI 318
Rationale: ACI 318 establishes requirements for design, construction, and
inspection of structural concrete.
3. What is the minimum clear cover typically required for reinforcement
cast against and permanently exposed to earth?
A. 1 inch
B. 1½ inches
C. 2 inches
D. 3 inches
Answer: D. 3 inches
Rationale: Reinforcement cast directly against earth generally requires 3
inches of concrete cover for durability and corrosion protection.
4. What is the primary purpose of concrete cover over reinforcing steel?
,A. Reduce weight
B. Improve workability
C. Protect reinforcement from corrosion and fire
D. Increase slump
Answer: C. Protect reinforcement from corrosion and fire
Rationale: Adequate cover shields steel from environmental exposure and
enhances fire resistance.
5. Which test is commonly used to measure concrete consistency in the
field?
A. Compression test
B. Slump test
C. Tensile test
D. Flexural test
Answer: B. Slump test
Rationale: The slump test measures the consistency and workability of
fresh concrete.
6. What is the standard cylinder size commonly used for concrete
compressive strength testing?
, A. 2 in. × 4 in.
B. 3 in. × 6 in.
C. 4 in. × 8 in.
D. 6 in. × 12 in.
Answer: D. 6 in. × 12 in.
Rationale: The traditional ASTM cylinder size is 6 inches by 12 inches,
although 4-inch by 8-inch cylinders are also permitted.
7. Reinforcing bars are identified by bar numbers representing:
A. Length in feet
B. Weight per foot
C. Nominal diameter in eighths of an inch
D. Yield strength
Answer: C. Nominal diameter in eighths of an inch
Rationale: A No. 8 bar has a nominal diameter of 8/8 inch or 1 inch.
8. What is the typical minimum yield strength for Grade 60 reinforcing
steel?
A. 40,000 psi
B. 50,000 psi
