Free mock exam
The substances electricians meet — COSHH Practice
Free topic-focused mock exam: all 30 questions on The substances electricians meet, drawn from the wider COSHH bank. 35-minute timer, 70% to pass, worked explanation on every question. Use this when you've taken the full mock once and want to drill the topics you got wrong.
- Questions
- 30
- Time limit
- 35 min
- Pass mark
- 70% · 21/30
- Question bank
- 30
Free, no sign-up. Retake as many times as you like — the questions are reshuffled, with the answer order changed.
Sample questions
01An apprentice asks why the firm is so strict about chasing dust. Which diseases does HSE link to respirable crystalline silica?
- ASkin burns and dermatitis from the dry dust only
- BHay fever, sinusitis and short-term eye strain only
- CTetanus, hepatitis and other infections from cuts
- DSilicosis, COPD, lung cancer and asthma
Why: HSE names silicosis, chronic obstructive pulmonary disease (COPD), lung cancer and asthma as the main diseases from RCS. Most develop slowly over years with no warning, and the damage can be serious and permanent by the time it is noticed. The other options describe infections or skin effects, which are not what HSE links to silica dust.
02EH40 Table 1 puts a notation against respirable crystalline silica. What is it, and when does it apply?
- ACarc, where it is generated as a result of a work process
- BNo notation, as silica is a natural mineral in rock
- CSen, where it is used as a raw material in a factory
- DSk, where the dust settles on bare skin during the work
Why: EH40 Table 1 marks RCS Carc, capable of causing cancer, where it is generated as a result of a work process, which is exactly what chasing and drilling do. Sk is the skin absorption notation and Sen the occupational asthma notation, and neither is printed against RCS. Being found naturally in rock does not take it off the list.
03You will be chasing walls for most of the morning with few breaks, using on-tool extraction. What does HSE suggest you consider for the RPE?
- ATaking the RPE off once the extraction is running well
- BWearing two FFP1 masks, one on top of the other
- CSwapping to an FFP2 mask, as it is easier to breathe through
- DPowered RPE giving the same level of protection
Why: HSE says that for longer chasing work, meaning over an hour without a break, powered RPE with the same level of protection should be considered. An FFP2 has an APF of 10, below the APF of 20 HSE gives for construction dust. Extraction does not capture all the dust, so the RPE stays on, and HSE gives an FFP1 an APF of only 4; doubling up masks is not a control HSE describes.
Common questions
Is the The substances electricians meet mock exam free?
Yes, it is free with no sign-up needed. Questions are pulled at random from a substantial bank, with a worked explanation on every question after you submit.
Can I retake the mock exam?
Yes. Every attempt picks a different random selection and reshuffles the options, so each retake gives you genuinely new questions. No limit on retakes.
Does this count as a qualification?
No. This is independent practice material and does not award a qualification, card or certificate. Where a subject has a formal qualification or card, you gain it through an approved provider.