Braking Systems Practice Questions
About This Topic
Large vehicles rely on air brakes, and this module tests how they work and what their warnings mean: low-pressure warnings, the different brake lines, endurance brakes and retarders, anti-lock systems and coupling brakes on trailers. Brake fade and descending long hills safely are examined in detail.
What the DVSA tests here
- Air brake systems: pressure build-up, warning devices and line failures
- Endurance brakes and retarders on long descents
- Causes of brake fade, frozen moisture and trailer brake faults
Practising this topic
This section holds 65 practice questions on braking systems, each followed by a clear explanation of the right answer. The LGV and PCV multiple-choice exam runs to 100 questions with a pass mark of 85, drawing on every module in the vocational syllabus. Revisit your wrong answers a day or two later — spaced repetition works far better than answering the same questions back to back.
In the run-up to test day
Professional drivers usually revise around shifts, which makes short, focused sessions the practical choice: a module like this one can be reviewed in fifteen minutes at the start or end of a working day. Treat exact figures — weights, hours, pressures and speed limits — as facts to memorise rather than rules of thumb, because the exam tests them precisely. Once the module feels secure, fold it into 100-question mock papers so your accuracy holds across the full hour and fifty-five minutes of the real test.