CITB Hazardous Substances

Question 1

Which regulations require employers to assess risk from hazardous substances and implement control measures?

Accepted Answer

The Control of Substances Hazardous to Health Regulations 2002 (COSHH)

Answer

The Dangerous Substances and Explosive Atmospheres Regulations 2002

Answer

The Chemicals (Hazard Information and Packaging for Supply) Regulations 2009

Answer

The Health and Safety (First-Aid) Regulations 1981

Question 2

What does a Safety Data Sheet (SDS) provide?

Accepted Answer

Detailed information on a substance's hazards, safe handling, storage, first aid, and emergency measures

Answer

The purchase price and supplier contact details only

Answer

Legal confirmation that the substance is safe to use

Answer

The manufacturer's quality certification

Question 3

What health risk does prolonged exposure to respirable crystalline silica (RCS) dust pose?

Accepted Answer

Silicosis — irreversible, potentially fatal scarring of the lungs

Answer

Skin sensitisation and dermatitis

Answer

Hearing loss

Answer

Vibration white finger

Question 4

Under COSHH, what is the preferred approach to controlling exposure to hazardous substances?

Accepted Answer

Substitute the hazardous substance with a less hazardous alternative, or eliminate it entirely

Answer

Provide respiratory protective equipment (RPE) as the first control

Answer

Rotate workers so no individual exceeds the WEL

Answer

Post warning signs near the hazardous substance

Question 5

What is a Workplace Exposure Limit (WEL)?

Accepted Answer

The maximum airborne concentration of a hazardous substance to which workers must not be exposed over a specified period

Answer

The concentration at which a substance becomes flammable

Answer

The maximum weight of a hazardous substance that can be stored on site

Answer

The minimum PPE standard required when working with chemicals

Question 6

Which common construction chemical is classified as a sensitiser that can cause occupational asthma?

Accepted Answer

Isocyanates found in two-pack paints, adhesives, and spray foam

Answer

Diesel exhaust fumes

Answer

Mineral water used for mixing

Answer

Sand used as a building aggregate