IRONWORKER (REINFORCING) CERTIFICATE OF
QUALIFICATION Exam QUESTIONS WITH CORRECT
ANSWERS (VERIFIED ANSWERS) PLUS RATIONALES
2026 Q&A|INSTANT DOWNLOD PDF
1. What is the primary purpose of reinforcing steel (rebar) in
concrete structures?
A. To improve aesthetic appearance
B. To increase concrete tensile strength
C. To reduce concrete curing time
D. To prevent concrete shrinkage
Answer: B
Rationale: Concrete is strong in compression but weak in
tension; rebar adds tensile strength.
2. What does the term “cover” refer to in reinforced concrete?
A. The amount of concrete over the reinforcing steel
B. The type of protective paint on steel
C. The width of the concrete slab
D. The spacing between rebars
Answer: A
Rationale: Cover ensures rebar is protected from corrosion and
fire, and provides proper concrete bonding.
3. Which tool is commonly used to cut reinforcing bars on-
site?
,A. Hand saw
B. Bolt cutter
C. Rebar cutter or angle grinder
D. Screwdriver
Answer: C
Rationale: Rebar cutters and angle grinders provide clean,
precise cuts for installation.
4. What is the standard spacing between ties in vertical
reinforced columns?
A. 100 mm
B. 200 mm
C. 300 mm
D. It depends on structural design
Answer: D
Rationale: Tie spacing varies based on structural load, rebar
size, and building codes.
5. Which of the following rebar grades is commonly used in
reinforced concrete?
A. Grade 25
B. Grade 40
C. Grade 60
D. All of the above
Answer: D
Rationale: Different grades are selected based on tensile
strength and project requirements.
,6. What is the purpose of a lap splice in rebar installation?
A. To anchor rebar to the foundation
B. To extend rebar length when bars are shorter than required
C. To decorate concrete surfaces
D. To prevent concrete cracking
Answer: B
Rationale: Lap splices connect two bars to transfer stress and
maintain structural integrity.
7. Which safety equipment is essential for ironworkers
handling rebar?
A. Gloves, safety glasses, hard hat, steel-toed boots
B. Sandals and sunglasses
C. Apron and scarf
D. None of the above
Answer: A
Rationale: Personal protective equipment (PPE) prevents cuts,
impact injuries, and eye damage.
8. Which method is commonly used to secure rebar
intersections?
A. Welding
B. Wire tying
C. Gluing
D. Bolting
Answer: B
, Rationale: Wire tying holds bars in place while concrete is
poured, ensuring proper alignment.
9. How should rebar be stored on-site to prevent corrosion?
A. On bare soil
B. Under cover and off the ground
C. Submerged in water
D. Tightly stacked in piles
Answer: B
Rationale: Elevated storage with cover prevents moisture and
soil from causing rust.
10. What does the term “hook” refer to in reinforcing steel?
A. A bending at the end of rebar to improve anchorage
B. A tool for lifting concrete
C. A type of tie wire
D. The curved edge of a concrete form
Answer: A
Rationale: Hooks anchor rebar securely in concrete and
improve structural performance.
11. Which factor primarily determines the diameter of rebar
used in a slab?
A. Aesthetic appearance
B. Structural load and span
C. Color preference
D. Concrete curing speed
Answer: B
QUALIFICATION Exam QUESTIONS WITH CORRECT
ANSWERS (VERIFIED ANSWERS) PLUS RATIONALES
2026 Q&A|INSTANT DOWNLOD PDF
1. What is the primary purpose of reinforcing steel (rebar) in
concrete structures?
A. To improve aesthetic appearance
B. To increase concrete tensile strength
C. To reduce concrete curing time
D. To prevent concrete shrinkage
Answer: B
Rationale: Concrete is strong in compression but weak in
tension; rebar adds tensile strength.
2. What does the term “cover” refer to in reinforced concrete?
A. The amount of concrete over the reinforcing steel
B. The type of protective paint on steel
C. The width of the concrete slab
D. The spacing between rebars
Answer: A
Rationale: Cover ensures rebar is protected from corrosion and
fire, and provides proper concrete bonding.
3. Which tool is commonly used to cut reinforcing bars on-
site?
,A. Hand saw
B. Bolt cutter
C. Rebar cutter or angle grinder
D. Screwdriver
Answer: C
Rationale: Rebar cutters and angle grinders provide clean,
precise cuts for installation.
4. What is the standard spacing between ties in vertical
reinforced columns?
A. 100 mm
B. 200 mm
C. 300 mm
D. It depends on structural design
Answer: D
Rationale: Tie spacing varies based on structural load, rebar
size, and building codes.
5. Which of the following rebar grades is commonly used in
reinforced concrete?
A. Grade 25
B. Grade 40
C. Grade 60
D. All of the above
Answer: D
Rationale: Different grades are selected based on tensile
strength and project requirements.
,6. What is the purpose of a lap splice in rebar installation?
A. To anchor rebar to the foundation
B. To extend rebar length when bars are shorter than required
C. To decorate concrete surfaces
D. To prevent concrete cracking
Answer: B
Rationale: Lap splices connect two bars to transfer stress and
maintain structural integrity.
7. Which safety equipment is essential for ironworkers
handling rebar?
A. Gloves, safety glasses, hard hat, steel-toed boots
B. Sandals and sunglasses
C. Apron and scarf
D. None of the above
Answer: A
Rationale: Personal protective equipment (PPE) prevents cuts,
impact injuries, and eye damage.
8. Which method is commonly used to secure rebar
intersections?
A. Welding
B. Wire tying
C. Gluing
D. Bolting
Answer: B
, Rationale: Wire tying holds bars in place while concrete is
poured, ensuring proper alignment.
9. How should rebar be stored on-site to prevent corrosion?
A. On bare soil
B. Under cover and off the ground
C. Submerged in water
D. Tightly stacked in piles
Answer: B
Rationale: Elevated storage with cover prevents moisture and
soil from causing rust.
10. What does the term “hook” refer to in reinforcing steel?
A. A bending at the end of rebar to improve anchorage
B. A tool for lifting concrete
C. A type of tie wire
D. The curved edge of a concrete form
Answer: A
Rationale: Hooks anchor rebar securely in concrete and
improve structural performance.
11. Which factor primarily determines the diameter of rebar
used in a slab?
A. Aesthetic appearance
B. Structural load and span
C. Color preference
D. Concrete curing speed
Answer: B
