This is a serious exam type thing you are now likely to need to Pass before you can go near any building work. cscstest.org.uk/#start-practice I got 46/50 (pass!), it gives you 45 minutes to do it but most will manage in about ten minutes if you want to try. It's mostly common sense but some deliberately tricky ones sneaked in. It doesn't ask for emails or anything intrusive
It's a mystery, I got that wrong too. Send an illegal immigrant up?
Must be something to do with Poles.
That question didn't occur in the sample test I tried: 48 out of 50, because I regard sharp glass as more hazardous than clean oil soaked pads. Contaminated oil is definitely hazardous waste, and even clean oil soaked into cotton rags is also hazardous (it can catch fire spontaneously), but soaked into pads made for the job it's harmless.