NCCER CORE INTRODUCTION TO BASIC
CONSTRUCTION SKILLS (6TH EDITION)
EXAM PREP 2025-2026 – 200 QUESTIONS &
ANSWERS A+ VERIFIED LATEST VERSION
1. What does OSHA stand for?
A. Occupational Safety and Hazard Administration
B. Occupational Safety and Health Administration
C. Operational Safety and Health Agency
D. Occupational Standards and Hazard Association
Answer: B. Occupational Safety and Health Administration
Rationale: OSHA is the federal agency responsible for enforcing workplace safety and health regulations.
2. What is the primary purpose of Personal Protective Equipment (PPE)?
A. Improve productivity
B. Reduce equipment costs
C. Protect workers from hazards
D. Increase tool lifespan
Answer: C. Protect workers from hazards
Rationale: PPE minimizes exposure to workplace injuries and health hazards.
3. Which hard hat class provides protection against electrical hazards?
A. Class C
B. Class G
C. Class E
D. Class D
Answer: C. Class E
Rationale: Class E hard hats provide the highest electrical protection.
4. Before using a ladder, a worker should always:
,A. Paint the ladder
B. Inspect it for damage
C. Remove warning labels
D. Use it on uneven ground
Answer: B. Inspect it for damage
Rationale: Damaged ladders can fail and cause falls.
5. What is the safest way to lift a heavy object?
A. Bend at the waist
B. Keep legs straight
C. Lift with your back
D. Bend your knees and lift with your legs
Answer: D. Bend your knees and lift with your legs
Rationale: Proper lifting reduces back injuries.
6. Which tool is primarily used to drive nails?
A. Chisel
B. Hammer
C. Level
D. Wrench
Answer: B. Hammer
7. A GFCI is designed to protect workers from:
A. Fires
B. Falling objects
C. Electric shock
D. Loud noises
Answer: C. Electric shock
Rationale: Ground Fault Circuit Interrupters shut off power during electrical faults.
8. What should you do before operating a power tool?
A. Remove safety guards
B. Read the manufacturer’s instructions
,C. Oil the floor
D. Disconnect PPE
Answer: B. Read the manufacturer’s instructions
9. Which fire extinguisher is used for electrical fires?
A. Class A
B. Class B
C. Class C
D. Class D
Answer: C. Class C
10. What is the first step in hazard communication?
A. Ignore warning labels
B. Identify workplace hazards
C. Remove PPE
D. Hide chemicals
Answer: B. Identify workplace hazards
11. Which hand tool is used to tighten bolts?
A. Screwdriver
B. Wrench
C. Pliers
D. Utility knife
Answer: B. Wrench
12. What is the recommended ladder angle ratio?
A. 1:1
B. 2:1
C. 4:1
D. 6:1
Answer: C. 4:1
Rationale: For every 4 feet of ladder height, the base should be 1 foot away from the wall.
, 13. Which of the following is considered a struck-by hazard?
A. Electric shock
B. Falling object hitting a worker
C. Loud machinery
D. Chemical exposure
Answer: B. Falling object hitting a worker
14. What should be done if a power tool cord is damaged?
A. Wrap it with paper
B. Continue using it carefully
C. Replace or repair it immediately
D. Paint over the damage
Answer: C. Replace or repair it immediately
15. Which mathematical operation is commonly used to determine area?
A. Addition
B. Division
C. Multiplication
D. Subtraction
Answer: C. Multiplication
16. What is the safest action when working around trenches?
A. Jump across trenches
B. Ignore trench walls
C. Use protective systems
D. Work alone
Answer: C. Use protective systems
17. What does SDS stand for?
A. Safety Data Sheet
B. Secure Document System
C. Safety Direction Standard
D. Standard Data Sheet
Answer: A. Safety Data Sheet
CONSTRUCTION SKILLS (6TH EDITION)
EXAM PREP 2025-2026 – 200 QUESTIONS &
ANSWERS A+ VERIFIED LATEST VERSION
1. What does OSHA stand for?
A. Occupational Safety and Hazard Administration
B. Occupational Safety and Health Administration
C. Operational Safety and Health Agency
D. Occupational Standards and Hazard Association
Answer: B. Occupational Safety and Health Administration
Rationale: OSHA is the federal agency responsible for enforcing workplace safety and health regulations.
2. What is the primary purpose of Personal Protective Equipment (PPE)?
A. Improve productivity
B. Reduce equipment costs
C. Protect workers from hazards
D. Increase tool lifespan
Answer: C. Protect workers from hazards
Rationale: PPE minimizes exposure to workplace injuries and health hazards.
3. Which hard hat class provides protection against electrical hazards?
A. Class C
B. Class G
C. Class E
D. Class D
Answer: C. Class E
Rationale: Class E hard hats provide the highest electrical protection.
4. Before using a ladder, a worker should always:
,A. Paint the ladder
B. Inspect it for damage
C. Remove warning labels
D. Use it on uneven ground
Answer: B. Inspect it for damage
Rationale: Damaged ladders can fail and cause falls.
5. What is the safest way to lift a heavy object?
A. Bend at the waist
B. Keep legs straight
C. Lift with your back
D. Bend your knees and lift with your legs
Answer: D. Bend your knees and lift with your legs
Rationale: Proper lifting reduces back injuries.
6. Which tool is primarily used to drive nails?
A. Chisel
B. Hammer
C. Level
D. Wrench
Answer: B. Hammer
7. A GFCI is designed to protect workers from:
A. Fires
B. Falling objects
C. Electric shock
D. Loud noises
Answer: C. Electric shock
Rationale: Ground Fault Circuit Interrupters shut off power during electrical faults.
8. What should you do before operating a power tool?
A. Remove safety guards
B. Read the manufacturer’s instructions
,C. Oil the floor
D. Disconnect PPE
Answer: B. Read the manufacturer’s instructions
9. Which fire extinguisher is used for electrical fires?
A. Class A
B. Class B
C. Class C
D. Class D
Answer: C. Class C
10. What is the first step in hazard communication?
A. Ignore warning labels
B. Identify workplace hazards
C. Remove PPE
D. Hide chemicals
Answer: B. Identify workplace hazards
11. Which hand tool is used to tighten bolts?
A. Screwdriver
B. Wrench
C. Pliers
D. Utility knife
Answer: B. Wrench
12. What is the recommended ladder angle ratio?
A. 1:1
B. 2:1
C. 4:1
D. 6:1
Answer: C. 4:1
Rationale: For every 4 feet of ladder height, the base should be 1 foot away from the wall.
, 13. Which of the following is considered a struck-by hazard?
A. Electric shock
B. Falling object hitting a worker
C. Loud machinery
D. Chemical exposure
Answer: B. Falling object hitting a worker
14. What should be done if a power tool cord is damaged?
A. Wrap it with paper
B. Continue using it carefully
C. Replace or repair it immediately
D. Paint over the damage
Answer: C. Replace or repair it immediately
15. Which mathematical operation is commonly used to determine area?
A. Addition
B. Division
C. Multiplication
D. Subtraction
Answer: C. Multiplication
16. What is the safest action when working around trenches?
A. Jump across trenches
B. Ignore trench walls
C. Use protective systems
D. Work alone
Answer: C. Use protective systems
17. What does SDS stand for?
A. Safety Data Sheet
B. Secure Document System
C. Safety Direction Standard
D. Standard Data Sheet
Answer: A. Safety Data Sheet
