Vehicle Condition
Daily walk-round checks, tyre wear, oil leaks and reporting defects.
What this topic covers
Daily walk-round checks, tyre wear, oil leaks and reporting defects. The full LGV Theory Test app contains 91 questions on this topic, drawn from the official DVSA bank.
Worked examples
Here are a few practice questions from this topic. Try answering each before reading the explanation.
Example 1
What is the main reason for cleaning your wheels and tyres when leaving a building site?
- A. It helps to keep the tyres in good condition
- B. So that the tyres will not cause damage to the road surface
- C. So that air pressure will not leak from the tyre valves
- D. It is illegal for you to spread mud on the road ✓ correct
Explanation: If your wheels leave mud on the road you must arrange for it to be cleared. A slippery, muddy surface could cause danger to other road users.
Example 2
A fifth wheel coupling relies on which of the following connecting devices?
- A. Suzie
- B. Kingpin ✓ correct
- C. D link
- D. Eyelet
Explanation: It is important to check that the kingpin locking mechanism is secure when recoupling. You should do this by attempting to move forward with the trailer brake applied. Also remember to connect the dog-clip.
Example 3
You notice that two wheel nuts are missing from one of the wheels. What should you do?
- A. Continue your journey
- B. Drive to the nearest tyre depot
- C. Use a nut from another wheel
- D. Park and phone for assistance ✓ correct
Explanation: If you notice any missing wheel nuts, park and phone for assistance. It’s essential that all wheel fixings are tightened to the torque specified by the manufacturer, with an approved calibrated torque wrench. As a professional driver you must ensure that your vehicle is in serviceable condition at all times. Checks should be made before you leave on any journey, but make a visual check every time you start up again after a rest stop. Don’t take risks by driving a defective vehicle.
Example 4
Air tanks on brake systems require draining because
- A. excess coolant may collect in them
- B. rain water can often seep in
- C. any engine leakages are directed here
- D. of moisture drawn in from the atmosphere ✓ correct
Explanation: This moisture condenses in the air and can be transmitted around a vehicle’s braking system. This is especially dangerous in cold weather, as it can lead to ice building up in the valves and pipes.
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