Health and Safety for Oil Firing Work
Why this domain matters
Oil firing work combines three hazards that rarely appear together elsewhere: flammable liquid fuel, combustion products including carbon monoxide, and mains electrical controls. Questions in this domain test whether you can identify the hazard, name the control, and know the legal duty behind it.
Core concepts to know
- Fuel hazards: kerosene is classified by flash point, not by how easily it ignites in bulk. Understand flash point, auto-ignition temperature, and why vapour (not liquid) burns.
- Fire triangle/tetrahedron and the classes of fire; which extinguisher media suit Class B (flammable liquid) fires and why water is dangerous on burning oil.
- COSHH: oil mists, combustion gases, and cleaning solvents all need assessment; know the difference between hazard and risk.
- Manual handling, working at height, confined spaces (oil tanks are confined spaces - never enter without a permit and rescue plan).
- Electrical safety: safe isolation, proving dead, locking off. Wet plant rooms raise shock risk.
- PPE, RIDDOR reporting, accident reporting, and the hierarchy of control.
Traps in questions
- Confusing flash point with fire point or auto-ignition temperature.
- Assuming a tank can be entered for cleaning without a confined-space regime.
- Picking an extinguisher type that conducts electricity or reacts with hot oil.
- Mixing up the employer's duty to assess risk with the employee's duty to follow controls.
Worked example
A technician must replace a burner nozzle in a basement plant room. Rule of thumb: isolate, prove dead, lock off, then work - never rely on a switch alone. Add forced ventilation before running the appliance, because spillage of a few millilitres of kerosene in a low-lying basement creates a vapour pool at floor level.