Written subject 4
Shared principles of electrical and chemical safety
Compare shock, static electricity, fire, and explosion through energy control and ignition prevention.
View electricity as path and interruption
Shock risk depends on current path, duration, and environment as well as voltage. Keep grounding, insulation, and protective-device roles distinct.
Find the fire triangle
Identify fuel, oxygen, and ignition in each scenario. Link ventilation, inerting, static control, and explosion-proof equipment to the condition each one reduces.
Read hazard information before work
Safety data and labels guide storage, handling, spill response, firefighting, and PPE selection. Check material properties and incompatibilities first.