Vehicle Safety & Mechanics Flashcards

What is the minimum legal tread depth for car tyres in the UK?

Answer: 1.6 mm across the central 75% of the width around the full circumference

The legal minimum tread depth for cars in the UK is 1.6 mm across the central three-quarters of the tread width around the entire circumference of the tyre.

What does the engine management warning light (amber) indicate?

Answer: A fault has been detected in the engine management system that requires investigation

The amber engine management light (EML) indicates that the engine control unit has detected a fault; the vehicle may still be driven but should be inspected by a qualified mechanic.

How often should tyre pressures be checked?

Answer: At least monthly and before any long journey

Tyre pressures should be checked monthly and before long journeys; under-inflated tyres cause increased fuel consumption, uneven wear and can overheat, potentially causing a blowout.

Anti-lock braking system (ABS) is designed to:

Answer: Prevent wheel lock-up under heavy braking, maintaining steering control

ABS modulates brake pressure to prevent wheel lock-up, allowing the driver to steer while braking hard; it does not necessarily reduce stopping distance but maintains directional control.

Which fluid level should be checked as part of routine vehicle safety before a long journey?

Answer: Engine oil, coolant, brake fluid, power steering fluid and screenwash

Before a long journey a driver should check all fluid levels: engine oil, coolant, brake fluid, power steering fluid (if applicable) and screenwash, as well as tyre pressures and lights.

Electronic stability control (ESC) helps prevent:

Answer: Skidding and loss of control by automatically applying brakes to individual wheels

ESC monitors the vehicle's direction versus the driver's steering input and automatically applies individual brakes to prevent slides and loss of control, particularly in cornering.