ICC Reinforced Concrete Special Inspector
Certification Newest (2026 Update) Actual
Practice Questions – Set 150+ Most
Common Exam Frequently Tested
Questions And Answers In Details 100%
Verified Exam Highly Recommendable For
Grade A+
1.
A special inspector observes concrete being placed in a slab. Which ASTM
standard governs the determination of slump?
A. ASTM C39
B. ASTM C143
C. ASTM C138
D. ASTM C231
Answer: B ✓ [ASTM C143]
Rationale: This standard governs the test method for slump of hydraulic cement
concrete used to assess workability.
2.
Minimum concrete cover for reinforcing steel cast against and permanently
exposed to earth is typically:
,A. 25 mm (1 in.)
B. 38 mm (1.5 in.)
C. 50 mm (2 in.)
D. 75 mm (3 in.)
Answer: C ✓ [50 mm (2 in.)]
Rationale: ACI 318 requires increased cover for protection against soil exposure
and moisture intrusion.
3.
Which test is used to determine compressive strength of concrete cylinders?
A. ASTM C31
B. ASTM C143
C. ASTM C39
D. ASTM C78
Answer: C ✓ [ASTM C39]
Rationale: ASTM C39 is the standard for compressive strength testing of cylindrical
concrete specimens.
4.
A concrete batch shows excessive bleeding. The most likely cause is:
A. Low water content
B. Excess fine aggregate
C. High water content
D. Excess cement content
Answer: C ✓ [High water content]
Rationale: Excess water increases segregation and bleeding in fresh concrete.
,5.
Who is responsible for ensuring concrete placement complies with approved
construction documents?
A. Concrete supplier
B. Special inspector
C. Structural engineer only
D. Building owner
Answer: B ✓ [Special inspector]
Rationale: The special inspector verifies compliance with approved plans and
codes during construction.
6.
ASTM C31 is used for:
A. Slump testing
B. Making and curing concrete test specimens
C. Air content testing
D. Reinforcing steel inspection
Answer: B ✓ [Making and curing concrete test specimens]
Rationale: ASTM C31 governs field-cured and standard-cured cylinder preparation.
7.
Reinforcing steel is primarily used in concrete to resist:
A. Compression only
B. Shrinkage only
C. Tensile forces
D. Thermal expansion
, Answer: C ✓ [Tensile forces]
Rationale: Concrete is weak in tension, so steel reinforcement resists tensile
stresses.
8.
The most common cause of honeycombing in concrete is:
A. Excess vibration
B. Under-vibration and poor consolidation
C. High cement content
D. Low slump only
Answer: B ✓ [Under-vibration and poor consolidation]
Rationale: Inadequate compaction leaves voids in concrete leading to
honeycombing.
9.
Air-entrained concrete is primarily used to improve:
A. Compressive strength
B. Workability only
C. Freeze-thaw durability
D. Setting time
Answer: C ✓ [Freeze-thaw durability]
Rationale: Entrained air bubbles protect against freeze-thaw damage in cold
environments.
10.
Which of the following affects concrete strength most significantly?
Certification Newest (2026 Update) Actual
Practice Questions – Set 150+ Most
Common Exam Frequently Tested
Questions And Answers In Details 100%
Verified Exam Highly Recommendable For
Grade A+
1.
A special inspector observes concrete being placed in a slab. Which ASTM
standard governs the determination of slump?
A. ASTM C39
B. ASTM C143
C. ASTM C138
D. ASTM C231
Answer: B ✓ [ASTM C143]
Rationale: This standard governs the test method for slump of hydraulic cement
concrete used to assess workability.
2.
Minimum concrete cover for reinforcing steel cast against and permanently
exposed to earth is typically:
,A. 25 mm (1 in.)
B. 38 mm (1.5 in.)
C. 50 mm (2 in.)
D. 75 mm (3 in.)
Answer: C ✓ [50 mm (2 in.)]
Rationale: ACI 318 requires increased cover for protection against soil exposure
and moisture intrusion.
3.
Which test is used to determine compressive strength of concrete cylinders?
A. ASTM C31
B. ASTM C143
C. ASTM C39
D. ASTM C78
Answer: C ✓ [ASTM C39]
Rationale: ASTM C39 is the standard for compressive strength testing of cylindrical
concrete specimens.
4.
A concrete batch shows excessive bleeding. The most likely cause is:
A. Low water content
B. Excess fine aggregate
C. High water content
D. Excess cement content
Answer: C ✓ [High water content]
Rationale: Excess water increases segregation and bleeding in fresh concrete.
,5.
Who is responsible for ensuring concrete placement complies with approved
construction documents?
A. Concrete supplier
B. Special inspector
C. Structural engineer only
D. Building owner
Answer: B ✓ [Special inspector]
Rationale: The special inspector verifies compliance with approved plans and
codes during construction.
6.
ASTM C31 is used for:
A. Slump testing
B. Making and curing concrete test specimens
C. Air content testing
D. Reinforcing steel inspection
Answer: B ✓ [Making and curing concrete test specimens]
Rationale: ASTM C31 governs field-cured and standard-cured cylinder preparation.
7.
Reinforcing steel is primarily used in concrete to resist:
A. Compression only
B. Shrinkage only
C. Tensile forces
D. Thermal expansion
, Answer: C ✓ [Tensile forces]
Rationale: Concrete is weak in tension, so steel reinforcement resists tensile
stresses.
8.
The most common cause of honeycombing in concrete is:
A. Excess vibration
B. Under-vibration and poor consolidation
C. High cement content
D. Low slump only
Answer: B ✓ [Under-vibration and poor consolidation]
Rationale: Inadequate compaction leaves voids in concrete leading to
honeycombing.
9.
Air-entrained concrete is primarily used to improve:
A. Compressive strength
B. Workability only
C. Freeze-thaw durability
D. Setting time
Answer: C ✓ [Freeze-thaw durability]
Rationale: Entrained air bubbles protect against freeze-thaw damage in cold
environments.
10.
Which of the following affects concrete strength most significantly?
