AK CORE DRILLING CONTRACTOR EXAM
QUESTIONS AND CORRECT ANSWERS (VERIFIED
ANSWERS) Q&A 2027 |INSTANT DOWNLOAD PDF
1. What is the primary purpose of core drilling?
A. To polish concrete surfaces
B. To create precise circular holes through concrete, masonry,
or similar materials
C. To remove paint from concrete
D. To compact soil
Correct answer: B. To create precise circular holes through
concrete, masonry, or similar materials
Rationale: Core drilling uses a cylindrical diamond bit to
produce accurate round openings for utilities, anchors, testing,
and other construction purposes.
2. Which cutting medium is most commonly used for
professional concrete core drilling?
A. Diamond
B. Wood
C. Plastic
D. Aluminum
Correct answer: A. Diamond
,Rationale: Diamond segments provide the hardness and
abrasion resistance needed to cut concrete and masonry
efficiently.
3. What is the main function of a core drill bit?
A. To create a cylindrical opening
B. To flatten a floor
C. To mix concrete
D. To compact gravel
Correct answer: A. To create a cylindrical opening
Rationale: A core bit cuts around the circumference of the hole
while producing a cylindrical core.
4. Why is water commonly used during wet core drilling?
A. To increase electrical voltage
B. To cool the bit and control dust
C. To make concrete stronger
D. To lubricate electrical wires
Correct answer: B. To cool the bit and control dust
Rationale: Water helps dissipate heat generated during drilling
and suppresses airborne silica-containing dust.
5. What is a major hazard associated with dry cutting
concrete?
,A. Excessive moisture
B. Respirable crystalline silica exposure
C. Low humidity only
D. Rust formation
Correct answer: B. Respirable crystalline silica exposure
Rationale: Cutting and drilling concrete can generate respirable
silica dust, which requires appropriate exposure controls.
6. Before drilling into an existing concrete slab, what should
be determined whenever applicable?
A. Paint color
B. Location of embedded utilities and reinforcement
C. Brand of concrete mixer
D. Age of nearby vehicles
Correct answer: B. Location of embedded utilities and
reinforcement
Rationale: Drilling can damage reinforcing steel, electrical
conduits, post-tensioning tendons, plumbing, or other
embedded systems.
7. What tool is commonly used to locate embedded
reinforcing steel and other metallic objects?
A. Concrete scanner
B. Tape measure only
, C. Wood plane
D. Pipe wrench
Correct answer: A. Concrete scanner
Rationale: Specialized scanners can help identify embedded
metallic components before drilling.
8. What is the purpose of a drilling stand or rig?
A. To store concrete
B. To guide and stabilize the core drill
C. To sharpen lumber
D. To transport water
Correct answer: B. To guide and stabilize the core drill
Rationale: A properly secured rig provides controlled
movement and helps maintain hole alignment.
9. Why must a core drilling rig be securely anchored?
A. To make it heavier for transportation
B. To prevent movement during drilling
C. To reduce the diameter of the bit
D. To increase concrete strength
Correct answer: B. To prevent movement during drilling
Rationale: Rig movement can cause inaccurate holes, damaged
tooling, binding, and dangerous loss of control.
QUESTIONS AND CORRECT ANSWERS (VERIFIED
ANSWERS) Q&A 2027 |INSTANT DOWNLOAD PDF
1. What is the primary purpose of core drilling?
A. To polish concrete surfaces
B. To create precise circular holes through concrete, masonry,
or similar materials
C. To remove paint from concrete
D. To compact soil
Correct answer: B. To create precise circular holes through
concrete, masonry, or similar materials
Rationale: Core drilling uses a cylindrical diamond bit to
produce accurate round openings for utilities, anchors, testing,
and other construction purposes.
2. Which cutting medium is most commonly used for
professional concrete core drilling?
A. Diamond
B. Wood
C. Plastic
D. Aluminum
Correct answer: A. Diamond
,Rationale: Diamond segments provide the hardness and
abrasion resistance needed to cut concrete and masonry
efficiently.
3. What is the main function of a core drill bit?
A. To create a cylindrical opening
B. To flatten a floor
C. To mix concrete
D. To compact gravel
Correct answer: A. To create a cylindrical opening
Rationale: A core bit cuts around the circumference of the hole
while producing a cylindrical core.
4. Why is water commonly used during wet core drilling?
A. To increase electrical voltage
B. To cool the bit and control dust
C. To make concrete stronger
D. To lubricate electrical wires
Correct answer: B. To cool the bit and control dust
Rationale: Water helps dissipate heat generated during drilling
and suppresses airborne silica-containing dust.
5. What is a major hazard associated with dry cutting
concrete?
,A. Excessive moisture
B. Respirable crystalline silica exposure
C. Low humidity only
D. Rust formation
Correct answer: B. Respirable crystalline silica exposure
Rationale: Cutting and drilling concrete can generate respirable
silica dust, which requires appropriate exposure controls.
6. Before drilling into an existing concrete slab, what should
be determined whenever applicable?
A. Paint color
B. Location of embedded utilities and reinforcement
C. Brand of concrete mixer
D. Age of nearby vehicles
Correct answer: B. Location of embedded utilities and
reinforcement
Rationale: Drilling can damage reinforcing steel, electrical
conduits, post-tensioning tendons, plumbing, or other
embedded systems.
7. What tool is commonly used to locate embedded
reinforcing steel and other metallic objects?
A. Concrete scanner
B. Tape measure only
, C. Wood plane
D. Pipe wrench
Correct answer: A. Concrete scanner
Rationale: Specialized scanners can help identify embedded
metallic components before drilling.
8. What is the purpose of a drilling stand or rig?
A. To store concrete
B. To guide and stabilize the core drill
C. To sharpen lumber
D. To transport water
Correct answer: B. To guide and stabilize the core drill
Rationale: A properly secured rig provides controlled
movement and helps maintain hole alignment.
9. Why must a core drilling rig be securely anchored?
A. To make it heavier for transportation
B. To prevent movement during drilling
C. To reduce the diameter of the bit
D. To increase concrete strength
Correct answer: B. To prevent movement during drilling
Rationale: Rig movement can cause inaccurate holes, damaged
tooling, binding, and dangerous loss of control.
