NYC MASON (DCAS) CERTIFICATION
PRACTICE EXAM Questions With 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 brick strength
B. To bond masonry units together
C. To waterproof the wall completely
D. To replace reinforcement steel
Answer: B (To bond masonry units together) ✓
Rationale: Mortar’s key function is to bond masonry units, distribute loads, and
fill joints rather than provide structural strength.
2. Which tool is commonly used to spread mortar on masonry units?
A. Chisel
B. Joiner
C. Trowel
D. Line pin
Answer: C (Trowel) ✓
Rationale: A trowel is the standard hand tool for applying and spreading mortar.
3. What is the standard term for a horizontal layer of bricks?
A. Wythe
, B. Course
C. Header
D. Bed joint
Answer: B (Course) ✓
Rationale: A course refers to a single horizontal layer of masonry units.
4. Which safety equipment is most essential when cutting masonry units?
A. Earplugs only
B. Hard hat only
C. Safety goggles
D. Leather gloves only
Answer: C (Safety goggles) ✓
Rationale: Eye protection is critical due to flying chips and dust during cutting.
5. What is the purpose of a masonry line (string line)?
A. To measure cement strength
B. To align courses horizontally
C. To cure mortar faster
D. To test wall load capacity
Answer: B (To align courses horizontally) ✓
Rationale: A string line ensures straight, level masonry courses.
6. Which bond pattern alternates headers and stretchers in each course?
A. Running bond
B. Flemish bond
C. Stack bond
D. English bond
Answer: B (Flemish bond) ✓
Rationale: Flemish bond alternates headers and stretchers within the same
course.
7. What is the main purpose of scaffolding on a masonry job site?
A. Material storage
, B. Worker elevation and access
C. Mixing mortar
D. Water drainage
Answer: B (Worker elevation and access) ✓
Rationale: Scaffolding provides safe elevated access for construction work.
8. Which material is primarily used as the binding agent in mortar?
A. Clay
B. Lime or cement
C. Gravel
D. Sand only
Answer: B (Lime or cement) ✓
Rationale: Cement or lime acts as the binder in mortar mixtures.
9. What is the correct term for vertical mortar joints?
A. Bed joints
B. Head joints
C. Collar joints
D. Control joints
Answer: B (Head joints) ✓
Rationale: Head joints are vertical joints between masonry units.
10.Which factor most affects mortar strength?
A. Brick color
B. Water content
C. Wall height
D. Joint thickness only
Answer: B (Water content) ✓
Rationale: Excess or insufficient water content significantly affects mortar
strength.
11.What does “plumb” mean in masonry work?
A. Perfectly horizontal
PRACTICE EXAM Questions With Correct
Answers (Verified Answers) Plus
Rationales 2026 Q&A | Instant
Download Pdf A+ Grade Guarantee
Verified By Professionals
1. What is the primary purpose of mortar in masonry construction?
A. To increase brick strength
B. To bond masonry units together
C. To waterproof the wall completely
D. To replace reinforcement steel
Answer: B (To bond masonry units together) ✓
Rationale: Mortar’s key function is to bond masonry units, distribute loads, and
fill joints rather than provide structural strength.
2. Which tool is commonly used to spread mortar on masonry units?
A. Chisel
B. Joiner
C. Trowel
D. Line pin
Answer: C (Trowel) ✓
Rationale: A trowel is the standard hand tool for applying and spreading mortar.
3. What is the standard term for a horizontal layer of bricks?
A. Wythe
, B. Course
C. Header
D. Bed joint
Answer: B (Course) ✓
Rationale: A course refers to a single horizontal layer of masonry units.
4. Which safety equipment is most essential when cutting masonry units?
A. Earplugs only
B. Hard hat only
C. Safety goggles
D. Leather gloves only
Answer: C (Safety goggles) ✓
Rationale: Eye protection is critical due to flying chips and dust during cutting.
5. What is the purpose of a masonry line (string line)?
A. To measure cement strength
B. To align courses horizontally
C. To cure mortar faster
D. To test wall load capacity
Answer: B (To align courses horizontally) ✓
Rationale: A string line ensures straight, level masonry courses.
6. Which bond pattern alternates headers and stretchers in each course?
A. Running bond
B. Flemish bond
C. Stack bond
D. English bond
Answer: B (Flemish bond) ✓
Rationale: Flemish bond alternates headers and stretchers within the same
course.
7. What is the main purpose of scaffolding on a masonry job site?
A. Material storage
, B. Worker elevation and access
C. Mixing mortar
D. Water drainage
Answer: B (Worker elevation and access) ✓
Rationale: Scaffolding provides safe elevated access for construction work.
8. Which material is primarily used as the binding agent in mortar?
A. Clay
B. Lime or cement
C. Gravel
D. Sand only
Answer: B (Lime or cement) ✓
Rationale: Cement or lime acts as the binder in mortar mixtures.
9. What is the correct term for vertical mortar joints?
A. Bed joints
B. Head joints
C. Collar joints
D. Control joints
Answer: B (Head joints) ✓
Rationale: Head joints are vertical joints between masonry units.
10.Which factor most affects mortar strength?
A. Brick color
B. Water content
C. Wall height
D. Joint thickness only
Answer: B (Water content) ✓
Rationale: Excess or insufficient water content significantly affects mortar
strength.
11.What does “plumb” mean in masonry work?
A. Perfectly horizontal
