South Carolina Block Mason
Certification License Exam Practice
Questions And Correct Answers
(Verified Answers) Plus Rationale 2026
Q&A| Instant Download Pdf
1. Which of the following best describes the primary purpose of a bond
beam in concrete masonry construction?
A. To provide thermal insulation within the wall
B. To distribute lateral loads and tie wall segments together
C. To increase aesthetic appeal of the masonry
D. To reduce moisture penetration through the wall
A bond beam reinforces the masonry wall by distributing lateral
forces and tying wall segments, improving structural integrity.
2. What is the minimum compressive strength requirement for grout
used in reinforced concrete masonry walls in South Carolina per
applicable codes?
A. 1,500 psi
B. 2,000 psi
C. 2,500 psi
D. 3,000 psi
The code specifies that grout for reinforced concrete masonry walls
must achieve a minimum compressive strength of 2,500 psi to ensure
structural adequacy.
,3. Which mortar type is most commonly specified for general masonry
work with moderate strength requirements?
A. Type M
B. Type S
C. Type N
D. Type O
Type S mortar is commonly used for general masonry because it
offers a balance of strength and flexibility suitable for many
structural applications.
4. What is the primary function of control joints in masonry walls?
A. To enhance wall insulation
B. To anchor the masonry to framing
C. To allow for movement and minimize cracking
D. To improve the wall’s fire resistance
Control joints let masonry expand and contract due to temperature
and moisture changes without uncontrolled cracking.
5. When constructing a masonry wall, how often should vertical
reinforcement be placed in cells?
A. Every third cell
B. Only at corners
C. At every 48 inches on center maximum
D. There is no requirement
Codes require vertical reinforcement at a maximum of 48 inches on
center in reinforced masonry walls to maintain structural
performance.
6. Which of the following best describes efflorescence?
A. A type of termite damage
B. A structural failure of masonry
C. A white crystalline deposit caused by soluble salts
, D. A form of paint blisters on masonry
Efflorescence results when soluble salts are brought to the surface by
moisture and crystallize, leaving a white residue.
7. What is the acceptable maximum size for coarse aggregate in grout
used with #8 or larger reinforcement bars?
A. 3/8 inch
B. 1/2 inch
C. 3/4 inch
D. 1 inch
When reinforcement bars #8 or larger are used, grout must have
coarse aggregate not exceeding 1/2 inch to ensure proper flow and
bond.
8. Which test method is used to determine the compressive strength of
masonry prisms?
A. ASTM C270
B. ASTM C97
C. ASTM C1314
D. ASTM C140
ASTM C1314 specifies the procedure for testing masonry prisms to
evaluate compressive strength of built-up masonry.
9. What is the minimum thickness for a nonload-bearing concrete
masonry unit (CMU) wall?
A. 4 inches
B. 6 inches
C. 8 inches
D. 10 inches
A 8-inch minimum thickness is required for nonload-bearing CMU
walls to ensure durability and performance.
Certification License Exam Practice
Questions And Correct Answers
(Verified Answers) Plus Rationale 2026
Q&A| Instant Download Pdf
1. Which of the following best describes the primary purpose of a bond
beam in concrete masonry construction?
A. To provide thermal insulation within the wall
B. To distribute lateral loads and tie wall segments together
C. To increase aesthetic appeal of the masonry
D. To reduce moisture penetration through the wall
A bond beam reinforces the masonry wall by distributing lateral
forces and tying wall segments, improving structural integrity.
2. What is the minimum compressive strength requirement for grout
used in reinforced concrete masonry walls in South Carolina per
applicable codes?
A. 1,500 psi
B. 2,000 psi
C. 2,500 psi
D. 3,000 psi
The code specifies that grout for reinforced concrete masonry walls
must achieve a minimum compressive strength of 2,500 psi to ensure
structural adequacy.
,3. Which mortar type is most commonly specified for general masonry
work with moderate strength requirements?
A. Type M
B. Type S
C. Type N
D. Type O
Type S mortar is commonly used for general masonry because it
offers a balance of strength and flexibility suitable for many
structural applications.
4. What is the primary function of control joints in masonry walls?
A. To enhance wall insulation
B. To anchor the masonry to framing
C. To allow for movement and minimize cracking
D. To improve the wall’s fire resistance
Control joints let masonry expand and contract due to temperature
and moisture changes without uncontrolled cracking.
5. When constructing a masonry wall, how often should vertical
reinforcement be placed in cells?
A. Every third cell
B. Only at corners
C. At every 48 inches on center maximum
D. There is no requirement
Codes require vertical reinforcement at a maximum of 48 inches on
center in reinforced masonry walls to maintain structural
performance.
6. Which of the following best describes efflorescence?
A. A type of termite damage
B. A structural failure of masonry
C. A white crystalline deposit caused by soluble salts
, D. A form of paint blisters on masonry
Efflorescence results when soluble salts are brought to the surface by
moisture and crystallize, leaving a white residue.
7. What is the acceptable maximum size for coarse aggregate in grout
used with #8 or larger reinforcement bars?
A. 3/8 inch
B. 1/2 inch
C. 3/4 inch
D. 1 inch
When reinforcement bars #8 or larger are used, grout must have
coarse aggregate not exceeding 1/2 inch to ensure proper flow and
bond.
8. Which test method is used to determine the compressive strength of
masonry prisms?
A. ASTM C270
B. ASTM C97
C. ASTM C1314
D. ASTM C140
ASTM C1314 specifies the procedure for testing masonry prisms to
evaluate compressive strength of built-up masonry.
9. What is the minimum thickness for a nonload-bearing concrete
masonry unit (CMU) wall?
A. 4 inches
B. 6 inches
C. 8 inches
D. 10 inches
A 8-inch minimum thickness is required for nonload-bearing CMU
walls to ensure durability and performance.
