In short
Two UK practical-test vehicle-safety questions: one asked before you drive, one asked while you drive.
The examiner asks one 'tell me' question before you start driving (e.g. 'tell me how you'd check the tyres are safe to use') and one 'show me' question while you are driving (e.g. 'show me how you'd wash the windscreen').
There are 12 tell-me questions and 9 show-me questions in the published bank. Getting one wrong is a single driving fault; getting both wrong still counts as one fault, not two.
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