CSCS MCQ 4 — Questions and Answers
Question 1: When using a power tool on a wet surface, which of the following is the MOST important precaution?
- Work quickly to reduce exposure time
- Use a Ground Fault Circuit Interrupter (GFCI) protected outlet (Correct answer)
- Stand on a rubber mat and keep going
- Switch to a higher-voltage tool to compensate for resistance
Correct answer: Use a Ground Fault Circuit Interrupter (GFCI) protected outlet
A GFCI detects ground faults and cuts power within milliseconds, preventing electrocution when tools are used in wet conditions.
Question 2: What is the primary purpose of a Method Statement on a construction site?
- To estimate project costs for the client
- To describe step-by-step how a specific task will be carried out safely (Correct answer)
- To record accident statistics for insurance purposes
- To list all subcontractors working on the project
Correct answer: To describe step-by-step how a specific task will be carried out safely
A Method Statement (often paired with a Risk Assessment as RAMS) details the safe sequence of work and control measures for a specific activity.
Question 3: Which PPE is specifically designed to protect workers from falling objects on a construction site?
- High-visibility vest
- Safety harness
- Hard hat (safety helmet) (Correct answer)
- Safety goggles
Correct answer: Hard hat (safety helmet)
Hard hats are designed to absorb and deflect the impact of falling objects, protecting the skull and brain.
Question 4: Under the Hierarchy of Controls, what is the highest (most preferred) level of control for eliminating a hazard?
- Personal Protective Equipment (PPE)
- Administrative controls
- Engineering controls
- Elimination of the hazard (Correct answer)
Correct answer: Elimination of the hazard
Elimination — physically removing the hazard — is the most effective control because it removes the risk entirely rather than managing it.
Question 5: A worker notices a gas leak smell near a trench. What is the CORRECT immediate response?
- Check for the source using a lighter for better visibility
- Evacuate all workers, call the gas company, and restrict the area (Correct answer)
- Continue work but note the smell in the daily log
- Ventilate the trench with a fan and carry on digging
Correct answer: Evacuate all workers, call the gas company, and restrict the area
A suspected gas leak is a life-threatening emergency — evacuate immediately, call emergency services and the utility, and keep ignition sources away.
Question 6: What is the required minimum width of a scaffold working platform used for both work and materials passage?
- 450 mm (18 inches)
- 600 mm (24 inches) (Correct answer)
- 675 mm (27 inches)
- 870 mm (34 inches)
Correct answer: 600 mm (24 inches)
A scaffold platform used for work and materials passage must be at least 600 mm wide to allow safe movement and working room.
Question 7: Which of the following best describes 'near miss' reporting on a construction site?
- Reporting only incidents where someone was injured
- Recording any unplanned event that could have caused injury or damage but didn't (Correct answer)
- Notifying OSHA of every close call within 24 hours
- Reporting incidents to the client but not to the safety officer
Correct answer: Recording any unplanned event that could have caused injury or damage but didn't
Near misses are unplanned events with no injury or damage that still signal a hazard — reporting them allows corrective action before a real accident occurs.
CSCS MCQ 4
When using a power tool on a wet surface, which of the following is the MOST important precaution?