Brakes, Tyres, Steering and Stability
Air build-up, warnings, service and parking brakes, tyres, steering, suspension, retarders and passenger-sensitive control.
How to prepare for DVSA PCV Part 1
Apply passenger-vehicle thinking to every rule: check the saloon and exterior, protect boarding passengers and blind areas, drive smoothly, and keep hours and CPC duties in the correct stage.
Core concepts
Concept 1
Large-PCV braking depends on system condition, pressure, speed, load, tyres, gradient and available grip.
Exam cue: Build air pressure and complete required brake checks before moving.
Concept 2
Air-pressure warnings or abnormal steering and braking response require prompt safe action.
Exam cue: Reduce speed before bends, descents and low-grip areas rather than relying on late braking.
Concept 3
High mass and centre of gravity increase rollover and passenger-injury risk during abrupt steering or braking.
Exam cue: Use progressive controls to protect standing, seated and moving passengers.
Risk pitfalls and guardrails
Moving before safe air pressure is available.
Guardrail: Do not apply car or LGV assumptions without checking passenger capacity, accessibility, service type, blind areas and passenger comfort.
Relying on a retarder without considering slippery-surface grip.
Guardrail: Do not apply car or LGV assumptions without checking passenger capacity, accessibility, service type, blind areas and passenger comfort.
Braking sharply without considering unrestrained passengers.
Guardrail: Do not apply car or LGV assumptions without checking passenger capacity, accessibility, service type, blind areas and passenger comfort.
Memory anchors
Pressure Before Progress
Large-PCV braking depends on system condition, pressure, speed, load, tyres, gradient and available grip.
Warning Means Safe Stop
Air-pressure warnings or abnormal steering and braking response require prompt safe action.
Mass and Height
High mass and centre of gravity increase rollover and passenger-injury risk during abrupt steering or braking.
Brake Check First
Build air pressure and complete required brake checks before moving.
Speed Before Risk
Reduce speed before bends, descents and low-grip areas rather than relying on late braking.
Passenger-Smooth Control
Use progressive controls to protect standing, seated and moving passengers.
Checkpoint rule
Do the check-up only after you can summarize each concept in one sentence and identify one dangerous pitfall from memory.
Knowledge Check (after reading)
Short check-up to confirm understanding of this module.
Check-up Questions
Why must air pressure reach the safe operating range before a large PCV moves?
The coach has had normal time to charge its air system, yet the low-pressure lamp remains lit. What is the safest decision?
Answer all questions to submit.
Next step personalized recommendations
Continue learning
Move forward only after this module is stable.
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