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 substance is toxic if ingested

Answer

The substance is flammable

Answer

The substance is explosive

Question 2

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

Accepted Answer

Dermal (skin) contact

Answer

Inhalation

Answer

Ingestion

Answer

Injection

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

Acidic with a pH of approximately 3

Answer

A mild irritant comparable to household soap

Answer

Radioactive due to calcium silicate compounds

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

To monitor workers' fitness for physical activity

Answer

To record the number of sick days taken by workers

Answer

To ensure workers are not using recreational drugs on site

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

Wearing barrier cream before work and at break times

Answer

Wearing waterproof gloves when working with wet cement

Answer

Using chrome-reduced cement that meets BS EN 197 standards

Question 6

Under DSEAR 2002, what must be produced before work involving flammable or explosive substances begins?

Accepted Answer

An explosion protection document identifying hazardous zones and the protective measures in place

Answer

A fire safety plan submitted to the fire service

Answer

Insurance documentation proving the site is covered for explosion risk

Answer

A permit to work signed by the HSE