Certification Exam Practice Questions And

ICC Structural Masonry Inspector Certification Exam Practice Questions And Correct Answers (Verified Answers) Plus Rationales 2026 Q&A | Instant Download Pdf

• Which type of masonry unit is typically hollow and used to reduce the

weight of walls?

• Solid brick
• Concrete masonry unit (CMU)
• Stone block
• Adobe

Rationale:

Concrete masonry units are often hollow to reduce weight, improve insulation, and allow placement of reinforcing steel and grout. 1 / 4

• What is the primary purpose of reinforcing steel in masonry

construction?

• Reduce moisture penetration
• Increase tensile strength
• Increase fire resistance
• Provide aesthetic appeal

Rationale:

Masonry is strong in compression but weak in tension; reinforcing steel improves tensile capacity.

• Which type of mortar is typically used for load-bearing walls?
• Type N
• Type S
• Type O
• Type M

Rationale:

Type M mortar has the highest compressive strength and is suitable for structural load-bearing masonry.

• What is the minimum specified compressive strength of a standard

concrete masonry unit used in structural walls?

• 500 psi
• 1000 psi
• 1900 psi
• 2500 psi 2 / 4

Rationale:

Structural CMUs typically have a minimum compressive strength of 1900 psi per building codes.

• What is the recommended maximum spacing of vertical reinforcement

in a partially grouted masonry wall?

• 24 inches
• 32 inches
• 48 inches
• 60 inches

Rationale:

Building codes specify vertical reinforcement spacing in partially grouted walls, typically not exceeding 48 inches.

• In masonry construction, what is the purpose of control joints?
• To provide aesthetic appeal
• To support loads
• To accommodate movement and reduce cracking
• To hold reinforcing steel

Rationale:

Control joints allow for expansion and contraction of masonry and help prevent uncontrolled cracking.

• What is the typical minimum mortar joint thickness for masonry units?
• 1/8 inch 3 / 4

• 3/8 inch
• 1/2 inch
• 5/8 inch

Rationale:

A 3/8-inch mortar joint is standard for most masonry units to ensure proper bonding and uniformity.

• Which inspection verifies that grout has properly filled the cores of

reinforced masonry units?

• Visual inspection
• Lift test or grout inspection
• Hammer sound test
• Moisture test

Rationale:

Grout inspection ensures the structural integrity of reinforced masonry by confirming cores are fully filled.

• What is the purpose of a bond beam in masonry walls?
• To provide ventilation
• To support insulation
• To tie walls together and distribute loads
• To act as a decorative element
• / 4