Electrical Tools and Equipment Safety Flashcards

What is the FIRST check you should perform before using a power tool on an electrotechnical work site?

Answer: Visually inspect the tool, cord, and plug for damage before use

A pre-use visual inspection identifies damaged insulation, cracked casings, or defective plugs that could cause electric shock or fire.

What does 'Class II' (double insulated) mean for a power tool?

Answer: The tool has two layers of insulation and does not require an earth (ground) connection for safety

Class II tools use double insulation to protect the user from electric shock without needing a grounding wire, reducing shock risk even if internal insulation fails.

What is the purpose of a Residual Current Device (RCD) when using portable power tools?

Answer: To detect earth leakage current and disconnect the supply within milliseconds to prevent fatal shock

An RCD monitors for imbalance between line and neutral current, tripping instantly if earth fault current flows through a person.

What should you do immediately if a power tool is found to be damaged or faulty?

Answer: Tag it out of service, remove it from use, and report it for repair

Damaged tools must be immediately taken out of service and tagged to prevent others from using them until they are professionally repaired or replaced.

What does PAT testing stand for in the context of electrical safety?

Answer: Portable Appliance Testing — the inspection and testing of portable electrical equipment for safety

Portable Appliance Testing (PAT) involves inspecting and electrically testing portable tools and appliances to confirm they are safe to use.

Which type of drill is most appropriate for boring into concrete or masonry on an electrotechnical installation site?

Answer: Rotary hammer drill (SDS drill) with carbide-tipped bits

An SDS rotary hammer drill combines rotation and impact action to efficiently penetrate concrete and masonry, which resists ordinary drill bits.