Arizona CR-31 Masonry Contractor
Exam Practice Questions And Correct
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Rationale 2026 Q&A| Instant Download
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1. Which type of mortar is most appropriate for laying CMU (concrete
masonry units) above grade where moderate compressive strength
and durability is required?
A. Type M
B. Type S
C. Type N
D. Type O
Rationale: Type S mortar offers higher compressive strength and
better bond for load-bearing and above-grade CMU work than Type
N, making it suitable for masonry contractor applications.
2. What is the minimum compressive strength requirement for a Type
M mortar mix used in structural walls?
A. 500 psi
B. 750 psi
C. 2,500 psi
D. 3,500 psi
Rationale: Type M mortar must achieve approximately 2,500 psi
, compressive strength, providing the highest strength among
standard mortar types for structural applications.
3. In reinforced masonry, what is the primary purpose of grout fill in
hollow CMU cells?
A. Aesthetic finish
B. Moisture barrier
C. Thermal insulation
D. Bond and load transfer
Rationale: Grout in reinforced masonry solidifies around
reinforcement, improving bond and transferring loads between units,
enhancing structural performance.
4. When placing reinforcing steel in a masonry wall, the minimum clear
cover from the face of the wall must be at least:
A. ¾ inch
B. 1 inch
C. 1½ inches
D. 2 inches
Rationale: Minimum cover ensures protection of reinforcement from
corrosion and fire exposure, and 1 inch is the typical required clear
cover in masonry construction.
5. What is the typical slump range for grout used in reinforced
masonry?
A. 2–4 inches
B. 4–6 inches
C. 8–11 inches
D. 12–14 inches
Rationale: Grout must be flowable enough to fill cells and
encapsulate rebar; an 8–11 inch slump achieves this without
segregation.
, 6. Control joints in masonry walls are primarily installed to:
A. Improve moisture resistance
B. Increase thermal rating
C. Control cracking
D. Support structural loads
Rationale: Control joints allow planned movement due to shrinkage
or thermal change, reducing random cracking in masonry walls.
7. What is the maximum recommended spacing for vertical control
joints in a CMU wall?
A. 10 feet
B. 20 feet
C. 30 feet
D. 40 feet
Rationale: Industry standards suggest control joints at approximately
20-foot intervals to accommodate movement and reduce stresses.
8. For lateral support of a masonry wall higher than 8 feet, what must
be provided at intervals to stabilize the wall?
A. Expansion joints
B. Control joints
C. Weep holes
D. Bond beams and ties
Rationale: Bond beams and wall ties help resist lateral forces,
stabilizing taller masonry walls against overturning and movement.
9. What is the primary function of weep holes at the base of a masonry
veneer?
A. Provide ventilation
B. Allow moisture drainage
C. Improve insulation
D. Increase structural strength
Exam Practice Questions And Correct
Answers (Verified Answers) Plus
Rationale 2026 Q&A| Instant Download
1. Which type of mortar is most appropriate for laying CMU (concrete
masonry units) above grade where moderate compressive strength
and durability is required?
A. Type M
B. Type S
C. Type N
D. Type O
Rationale: Type S mortar offers higher compressive strength and
better bond for load-bearing and above-grade CMU work than Type
N, making it suitable for masonry contractor applications.
2. What is the minimum compressive strength requirement for a Type
M mortar mix used in structural walls?
A. 500 psi
B. 750 psi
C. 2,500 psi
D. 3,500 psi
Rationale: Type M mortar must achieve approximately 2,500 psi
, compressive strength, providing the highest strength among
standard mortar types for structural applications.
3. In reinforced masonry, what is the primary purpose of grout fill in
hollow CMU cells?
A. Aesthetic finish
B. Moisture barrier
C. Thermal insulation
D. Bond and load transfer
Rationale: Grout in reinforced masonry solidifies around
reinforcement, improving bond and transferring loads between units,
enhancing structural performance.
4. When placing reinforcing steel in a masonry wall, the minimum clear
cover from the face of the wall must be at least:
A. ¾ inch
B. 1 inch
C. 1½ inches
D. 2 inches
Rationale: Minimum cover ensures protection of reinforcement from
corrosion and fire exposure, and 1 inch is the typical required clear
cover in masonry construction.
5. What is the typical slump range for grout used in reinforced
masonry?
A. 2–4 inches
B. 4–6 inches
C. 8–11 inches
D. 12–14 inches
Rationale: Grout must be flowable enough to fill cells and
encapsulate rebar; an 8–11 inch slump achieves this without
segregation.
, 6. Control joints in masonry walls are primarily installed to:
A. Improve moisture resistance
B. Increase thermal rating
C. Control cracking
D. Support structural loads
Rationale: Control joints allow planned movement due to shrinkage
or thermal change, reducing random cracking in masonry walls.
7. What is the maximum recommended spacing for vertical control
joints in a CMU wall?
A. 10 feet
B. 20 feet
C. 30 feet
D. 40 feet
Rationale: Industry standards suggest control joints at approximately
20-foot intervals to accommodate movement and reduce stresses.
8. For lateral support of a masonry wall higher than 8 feet, what must
be provided at intervals to stabilize the wall?
A. Expansion joints
B. Control joints
C. Weep holes
D. Bond beams and ties
Rationale: Bond beams and wall ties help resist lateral forces,
stabilizing taller masonry walls against overturning and movement.
9. What is the primary function of weep holes at the base of a masonry
veneer?
A. Provide ventilation
B. Allow moisture drainage
C. Improve insulation
D. Increase structural strength
