COSHH Quiz: Hazardous Substances Questions and Answers
25 questions
About 13 min
Updated
0 of 25 answered
Score 0
Question 1 of 25
What does COSHH stand for?
Question 2 of 25
Which workplace hazard can fall within COSHH?
Question 3 of 25
Which substance has its own specific regulations rather than being covered by COSHH?
Question 4 of 25
Which exposure route must an assessment consider?
Question 5 of 25
Does a lack of a hazard pictogram prove a process is safe?
Question 6 of 25
What is the main purpose of a safety data sheet in an assessment?
Question 7 of 25
Who should be considered when deciding who may be exposed?
Question 8 of 25
What is the preferred starting point for controlling exposure?
Question 9 of 25
Why assess a proposed substitute cleaner?
Question 10 of 25
What is the purpose of local exhaust ventilation?
Question 11 of 25
An LEV airflow indicator shows inadequate flow. What should the operator do?
Question 12 of 25
Under COSHH, what is the usual maximum interval for LEV thorough examination and testing, unless a shorter specified interval applies?
Question 13 of 25
What do routine checks add to periodic LEV examination?
Question 14 of 25
What is a workplace exposure limit (WEL)?
Question 15 of 25
How should a manager interpret exposure below a WEL?
Question 16 of 25
When might respiratory protective equipment be needed?
Question 17 of 25
What is required when initially selecting a tight-fitting respirator for a wearer?
Question 18 of 25
Why can beard growth in the sealing area be a problem?
Question 19 of 25
How should protective gloves be chosen?
Question 20 of 25
What is a suitable housekeeping approach for hazardous dust?
Question 21 of 25
Why separate incompatible chemicals in storage?
Question 22 of 25
A worker finds a leaking container of unknown chemical. What should happen first?
Question 23 of 25
What is the purpose of COSHH health surveillance where required?
Question 24 of 25
When should a COSHH assessment be reviewed?
Question 25 of 25
What should workers be trained to understand about hazardous substances?
About This Quiz
Test your understanding of hazardous-substance assessment and practical exposure controls with 25 original questions. This learning resource is useful for workers, supervisors and safety learners handling chemicals or working with processes that generate harmful dust, fume, vapour or biological exposure.
Scope and independence
This quiz concerns Great Britain's COSHH framework, including the Control of Substances Hazardous to Health Regulations 2002 as amended. It is awareness practice, not a qualification, a workplace COSHH assessment or authorisation to handle a substance. Northern Ireland and other countries have their own legal arrangements. Follow the applicable law, task-specific assessment, safety data and competent advice. Questions distinguish COSHH from the separate asbestos regime.
What you will practise
Start by identifying how exposure occurs during normal work, cleaning and maintenance. Consider whether the substance or process can be removed, then how releases can be contained or captured. Treat PPE as part of an assessed control system, and remember that an SDS informs an assessment but does not replace it.
How to use this quiz
Answer all 25 multiple-choice questions, selecting one answer for each. There is no time limit. The learning pass mark is 70%, answers are shuffled and retakes are allowed. Read the explanations after submission, identify the topics you missed and review them before another attempt. A practice score does not establish workplace competence.
Related learning
Continue with our COSHH risk assessment guide. Compare the scenarios with the controls and procedures used in your workplace.
Authoritative references
Reference information checked on 5 November 2026. Consult the current primary guidance for the task and jurisdiction.
