CSCS MCQ 2 — Questions and Answers
Question 1: What is the minimum height at which edge protection (guardrails) must be provided on a construction site scaffold?
- 1.5 meters
- 2 meters (Correct answer)
- 4 feet
- 5 feet
Correct answer: 2 meters
Under Work at Height Regulations, edge protection must be provided when working at 2 meters or more above ground level.
Question 2: A co-worker is using a circular saw without blade guards fitted. What should you do first?
- Continue working and report it at the end of the shift
- Stop the worker immediately and report to the supervisor (Correct answer)
- Replace the guard yourself without telling anyone
- Ignore it — guards slow down productivity
Correct answer: Stop the worker immediately and report to the supervisor
Missing machine guards are an immediate danger; stop the unsafe work and report it to a supervisor right away.
Question 3: Which type of fire extinguisher is SAFE to use on an electrical fire?
- Water (red)
- Foam (cream)
- CO2 (black) (Correct answer)
- Wet chemical (yellow)
Correct answer: CO2 (black)
CO2 extinguishers (black label) are non-conductive and safe for use on live electrical equipment.
Question 4: What does a blue and white safety sign on a construction site indicate?
- Prohibition — action is forbidden
- Warning — hazard present
- Mandatory — action must be taken (Correct answer)
- Safe condition — emergency route
Correct answer: Mandatory — action must be taken
Blue circular signs are mandatory signs that require specific behavior, such as wearing PPE.
Question 5: Before excavating near underground services, a worker should FIRST:
- Begin digging carefully with a mini-excavator
- Obtain up-to-date service drawings and use a CAT scanner (Correct answer)
- Call 811 (Dig Safe) and wait 24 hours
- Ask a coworker who worked on the site previously
Correct answer: Obtain up-to-date service drawings and use a CAT scanner
Always obtain current service drawings and use a cable avoidance tool (CAT) before any excavation to locate buried utilities.
Question 6: Under OSHA regulations, what is the maximum weight an individual worker is generally expected to lift without mechanical assistance?
- 25 lbs (11 kg)
- 50 lbs (23 kg) (Correct answer)
- 75 lbs (34 kg)
- 100 lbs (45 kg)
Correct answer: 50 lbs (23 kg)
OSHA generally recommends a maximum single lift of 50 lbs (23 kg); heavier loads should use mechanical aids or team lifts.
Question 7: If you discover asbestos-containing material while breaking out a wall, you should:
- Wet it down and continue carefully
- Stop work, leave the area undisturbed, and report to the supervisor (Correct answer)
- Remove it yourself using a dust mask
- Bag it in black refuse sacks and dispose of it in the dumpster
Correct answer: Stop work, leave the area undisturbed, and report to the supervisor
Disturbing asbestos releases dangerous fibers; stop all work immediately and report so licensed removal contractors can be engaged.
CSCS MCQ 2
What is the minimum height at which edge protection (guardrails) must be provided on a construction site scaffold?