The Lorry and Bus Theory Test: Five Ways Driver CPC Part 1 Is Not Like the Car Test

Plenty of people arrive at the Driver CPC part 1 theory test assuming it is the car theory test with bigger vehicles in the questions. It is not. The structure, the booking process, the pass marks and even the way your two year clock starts are all different, and each of those differences has caught someone out. If you are moving from a car licence towards a lorry, bus or coach licence, here is what actually changes.

You book the two parts separately

This is the difference that surprises people most. The car theory test is booked and taken as a single appointment, with the multiple-choice questions and hazard perception run back to back. Driver CPC part 1 is made up of the same two components, but you book each one separately.

You can sit them on the same day if the slots line up, and it does not matter which you take first. You can also spread them across two different days, which is genuinely useful if you know one half is your weak side and you would rather not carry the fatigue of a hundred questions into the video clips. You can book part 1 as soon as you have your provisional lorry or bus entitlement.

One hundred questions, and a much longer sitting

The car multiple-choice test is 50 questions. Driver CPC part 1 gives you 100 questions and one hour and 55 minutes to answer them, with a pass mark of 85 out of 100.

Two things follow from that. First, the margin is thin: 15 wrong answers and you are out, so there is no comfortable band of topics you can afford to skip. Second, almost two hours of screen time is a stamina problem as much as a knowledge problem. You can flag questions to return to, and you can change any answer at any point before you finish, so a sensible tactic is to move briskly through the whole paper and come back to the flagged ones rather than stalling early. You do not have to use the full time.

Nineteen clips and a different pass mark

The hazard perception half also scales up. You watch 19 video clips rather than 14. Each contains at least one developing hazard, and one of the clips contains two, so there are 20 scoring opportunities worth up to 5 points each. The pass mark is 67 out of 100.

The scoring behaviour is the same as the car test, and so is the trap. You lose nothing for clicking on something that turns out not to be a hazard, but you score nothing at all on a clip if you click continuously or in a pattern, and you get only one attempt at each clip with no chance to review. Click when something genuinely starts to develop, not as insurance.

Your two year clock starts with the first part you pass

Here is the deadline people miss. You must pass both parts within two years of each other to be given your theory test certificate. Once you have it, the certificate is valid for two years from the date you passed the first part, not from the date you finished the second.

So if you pass the multiple choice in January and leave the hazard perception until the following December, you have already spent most of your window before your certificate is even issued. You need to pass the Driver CPC part 3a and part 3b driving tests inside that period, otherwise you go back and sit part 1 again. Booking the two halves close together is the simplest way to protect the time you will need at the practical stage.

If you fail, and what that costs

You get a results letter at the test centre for whichever part you have just taken, with feedback on why you did not pass. You can rebook straight away, but you cannot sit it again for another three clear working days.

The reading list is worth knowing too, because it is broader than the car test. The questions are drawn from the Highway Code, Know Your Traffic Signs, and the DVSA guide to driving goods vehicles or the DVSA guide to driving buses and coaches, depending on which route you are taking. Vehicle-specific content is where car drivers moving up tend to lose their marks, not on general road procedure they already know.

Revise for the test you are actually taking

The habits that got you through the car theory test will not be enough here on their own. Longer paper, tighter pass mark, more clips, and a two year clock that starts earlier than most people expect. Practise the full hundred questions in one sitting so the length stops being a shock, and treat the vehicle-specific material as the part that needs the most attention. Theory Test Passed is DVSA licensed and covers the LGV and PCV question banks alongside cars, so you can revise for the test you are booked on rather than a rough approximation of it.