Controlling Risks Flashcards
6 cards from real IOSH practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 Controlling Risks flashcards as text
What is 'elimination' in the hierarchy of control?
Answer: Completely removing the hazard from the workplace
Elimination means completely removing the hazard so that the risk no longer exists. For example, removing a trip hazard, stopping a dangerous process, or redesigning work so a hazardous activity is no longer needed. It is the most effective control.
What is 'substitution' as a control measure?
Answer: Replacing a hazardous substance, process or equipment with a less hazardous alternative
Substitution involves replacing something hazardous with something less hazardous. For example, using a water-based paint instead of a solvent-based one, or using a less noisy machine. It is the second most effective control after elimination.
What is an 'engineering control'?
Answer: A physical control such as a guard, ventilation system, or enclosure that reduces exposure
Engineering controls use physical means to reduce or prevent exposure to hazards. Examples include machine guards, local exhaust ventilation (LEV), acoustic enclosures, safety interlocks, and handrails. They are preferred over administrative controls and PPE.
What is an 'administrative control' measure?
Answer: A control that relies on procedures, training, signage, job rotation or scheduling
Administrative controls change the way people work rather than removing or physically controlling the hazard. Examples include safe systems of work, procedures, training, supervision, signage, job rotation, and limiting exposure time.
Why is PPE considered the last resort in the hierarchy of control?
Answer: Because it only protects the individual, can fail, and depends on correct use
PPE is the least effective control because it only protects the individual wearing it, it can be uncomfortable, it may not be worn correctly, it can fail or degrade, and it doesn't reduce the hazard itself. Higher-level controls protect everyone.
What is a 'safe system of work'?
Answer: A formal procedure based on systematic examination of work to identify hazards and define safe methods
A safe system of work is a formal procedure resulting from a systematic examination of a task to identify all the hazards. It defines safe methods of working that eliminate those hazards or minimise the risks. It considers people, equipment, materials and the environment.