Hawaii C-31 Masonry Contractor Examination
Questions and Correct Answers (Verified
Answers) Plus Rationales 2026 Q&A | Instant
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1.
What is the primary purpose of mortar in masonry construction?
A. To increase the compressive strength of concrete blocks
B. To bond masonry units together and seal joints
C. To act as the main structural support system
D. To replace reinforcement steel
Rationale: Mortar serves primarily as a bonding agent between
masonry units, helping distribute loads evenly and sealing joints
against moisture and air infiltration. It is not intended to provide
primary structural strength or replace reinforcement.
2.
,Which mortar type is typically used for below-grade or high-strength
structural applications?
A. Type O
B. Type N
C. Type S
D. Type K
Rationale: Type S mortar has higher compressive strength and is
commonly used in structural and below-grade applications where
lateral loads and soil pressure are significant.
3.
What is the standard shape of a typical concrete masonry unit (CMU)?
A. Cylindrical
B. Rectangular prism with hollow cores
C. Triangular wedge
D. Hexagonal block
Rationale: CMUs are rectangular blocks with hollow cores designed to
reduce weight, allow reinforcement, and improve insulation
properties.
,4.
What is the purpose of rebar in masonry walls?
A. To reduce curing time
B. To improve mortar adhesion
C. To provide tensile strength
D. To increase block size
Rationale: Masonry is strong in compression but weak in tension.
Reinforcing steel (rebar) provides tensile strength and improves
structural performance.
5.
Which bond pattern is most commonly used in structural block walls?
A. Stack bond
B. Running bond
C. Herringbone bond
D. Basket weave bond
Rationale: Running bond offsets vertical joints between courses,
improving wall strength and load distribution.
6.
, What is the minimum curing time generally recommended for masonry
mortar?
A. 6 hours
B. 12 hours
C. 24–48 hours minimum initial set period
D. 1 week before any inspection
Rationale: Mortar needs adequate time to hydrate and gain initial
strength, typically at least 24–48 hours before significant loads or
stress are applied.
7.
What tool is primarily used to spread mortar on masonry units?
A. Chisel
B. Hammer
C. Trowel
D. Float saw
Rationale: A masonry trowel is designed to pick up, spread, and shape
mortar efficiently during block or brick laying.
8.
Questions and Correct Answers (Verified
Answers) Plus Rationales 2026 Q&A | Instant
Download Pdf
1.
What is the primary purpose of mortar in masonry construction?
A. To increase the compressive strength of concrete blocks
B. To bond masonry units together and seal joints
C. To act as the main structural support system
D. To replace reinforcement steel
Rationale: Mortar serves primarily as a bonding agent between
masonry units, helping distribute loads evenly and sealing joints
against moisture and air infiltration. It is not intended to provide
primary structural strength or replace reinforcement.
2.
,Which mortar type is typically used for below-grade or high-strength
structural applications?
A. Type O
B. Type N
C. Type S
D. Type K
Rationale: Type S mortar has higher compressive strength and is
commonly used in structural and below-grade applications where
lateral loads and soil pressure are significant.
3.
What is the standard shape of a typical concrete masonry unit (CMU)?
A. Cylindrical
B. Rectangular prism with hollow cores
C. Triangular wedge
D. Hexagonal block
Rationale: CMUs are rectangular blocks with hollow cores designed to
reduce weight, allow reinforcement, and improve insulation
properties.
,4.
What is the purpose of rebar in masonry walls?
A. To reduce curing time
B. To improve mortar adhesion
C. To provide tensile strength
D. To increase block size
Rationale: Masonry is strong in compression but weak in tension.
Reinforcing steel (rebar) provides tensile strength and improves
structural performance.
5.
Which bond pattern is most commonly used in structural block walls?
A. Stack bond
B. Running bond
C. Herringbone bond
D. Basket weave bond
Rationale: Running bond offsets vertical joints between courses,
improving wall strength and load distribution.
6.
, What is the minimum curing time generally recommended for masonry
mortar?
A. 6 hours
B. 12 hours
C. 24–48 hours minimum initial set period
D. 1 week before any inspection
Rationale: Mortar needs adequate time to hydrate and gain initial
strength, typically at least 24–48 hours before significant loads or
stress are applied.
7.
What tool is primarily used to spread mortar on masonry units?
A. Chisel
B. Hammer
C. Trowel
D. Float saw
Rationale: A masonry trowel is designed to pick up, spread, and shape
mortar efficiently during block or brick laying.
8.
