CITB Health, Safety and Environment Test (Operatives) — Practice
Hazardous substances (COSHH): practice questions
Our CITB HS&E Operatives bank has 25 questions on this topic. Here are 3 of them with answers; the full mock exam draws from every topic, like the real one.
Question 1
Which group of chemicals found in some two-pack paints and spray foams is a leading cause of occupational asthma?
- Chlorinated salts
- Isocyanates
- Silicates
- Nitrogen
Show the answer
B. Isocyanates — Isocyanates are respiratory sensitisers; spraying them needs strict controls and air-fed RPE.
Question 2
Under COSHH, what is the first thing an employer should consider when a task involves a hazardous substance?
- Which type of gloves are the cheapest to buy
- How many workers can share one respirator
- Whether a warning sign can be put on the store door
- Whether the substance can be avoided or replaced
Show the answer
D. Whether the substance can be avoided or replaced — Prevention by elimination or substitution comes before control measures and PPE.
Question 3
What is the best way to control dust when cutting a paving slab with a petrol saw?
- Cut it upwind and hold your breath
- Sweep up the dust afterwards with a dry stiff brush
- Use water suppression on the saw and suitable RPE
- Wear a paper dust mask with no other controls
Show the answer
C. Use water suppression on the saw and suitable RPE — HSE advises on-tool controls such as water suppression or extraction, backed up by RPE.