CITB Hazardous Substances 2

Question 1

What does the GHS pictogram showing a flame over a circle indicate on a chemical container?

Accepted Answer

The substance is an oxidiser that can intensify fires

Answer

The flame over circle pictogram identifies oxidising substances — they can cause or intensify fires by releasing oxygen, making them extremely dangerous near combustible materials.

Question 2

Which exposure route most commonly causes skin disorders on construction sites?

Accepted Answer

Dermal (skin) contact

Answer

Skin contact with substances such as cement, epoxy resins, and solvents is the most common exposure route for occupational skin disorders on construction sites.

Question 3

Wet cement causes chemical burns primarily because it is:

Accepted Answer

Strongly alkaline with a pH of 11–13, capable of destroying skin tissue on prolonged contact

Answer

Wet concrete and cement are highly alkaline (pH 11–13); prolonged skin contact causes progressive chemical burns that may not be immediately painful, leading workers to underestimate the damage.

Question 4

What is the purpose of health surveillance under COSHH?

Accepted Answer

To detect early signs of work-related ill health caused by hazardous substance exposure so action can be taken before serious harm occurs

Answer

COSHH health surveillance detects early symptoms of occupational disease such as dermatitis or asthma, enabling prompt action to protect the worker and review control measures.

Question 5

Which of the following is NOT an effective control for cement dermatitis?

Accepted Answer

Repeatedly washing hands with solvent-based cleaning products

Answer

Solvent-based skin cleaners strip natural skin oils and worsen dermatitis; gentle soap and water with barrier cream, plus gloves, are the correct controls.

CITB HS&E Operatives Practice Test

CITB HS&E Operatives Practice Test

CITB Hazardous Substances 2