CSCS Tools and Equipment Safety 2 — Questions and Answers
Question 1: What is the main purpose of a residual current device (RCD) used with electrical tools?
- To boost the power output of the tool
- To cut off the electricity supply quickly if a fault occurs (Correct answer)
- To regulate voltage automatically
- To prevent the tool from overheating
Correct answer: To cut off the electricity supply quickly if a fault occurs
An RCD rapidly disconnects the power supply when it detects a leakage current, protecting users from electric shock.
Question 2: When should you stop using a ladder as a work platform and use scaffolding instead?
- When the work takes longer than 30 minutes or both hands are needed (Correct answer)
- When it is windy outside
- When the ladder is more than 2 meters tall
- When working indoors
Correct answer: When the work takes longer than 30 minutes or both hands are needed
Ladders are only suitable for short-duration, light-duty tasks; if the job requires both hands or takes more than 30 minutes, a scaffold or working platform should be used.
Question 3: What does a color-coded inspection tag on a tool or piece of equipment indicate?
- The tool's country of manufacture
- That the tool has been inspected and is safe to use within a specific period (Correct answer)
- The tool's maximum operating speed
- The tool belongs to a specific worker
Correct answer: That the tool has been inspected and is safe to use within a specific period
Color-coded inspection tags show the date of the last safety inspection and confirm the equipment is approved for use during the relevant period.
Question 4: Which type of fire extinguisher should be used on an electrical equipment fire?
- Water extinguisher
- Foam extinguisher
- CO2 (carbon dioxide) extinguisher (Correct answer)
- Wet chemical extinguisher
Correct answer: CO2 (carbon dioxide) extinguisher
CO2 extinguishers are safe to use on electrical fires because they do not conduct electricity and leave no residue that could cause further damage.
Question 5: What is the correct procedure when a tool breaks during use on site?
- Attempt to repair it yourself immediately
- Continue using it if the break is minor
- Tag it out of service and report it to the supervisor (Correct answer)
- Leave it where it is and start a new task
Correct answer: Tag it out of service and report it to the supervisor
A broken tool must be taken out of service, clearly tagged or removed from the work area, and reported so it can be properly repaired or replaced.
Question 6: Why should compressed air never be used to clean dust off clothing or skin?
- Because it is too expensive to use for cleaning
- Because it can force air into the body causing serious injury or death (Correct answer)
- Because it leaves an oily residue
- Because it is too cold and can cause frostbite
Correct answer: Because it can force air into the body causing serious injury or death
Compressed air directed at the body can penetrate the skin or enter body openings, causing an air embolism or other life-threatening injuries.
CSCS Tools and Equipment Safety 2
What is the main purpose of a residual current device (RCD) used with electrical tools?