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Total Questions 87
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Vehicle condition

You notice that one of your tyres has a bulge in the side wall. What will happen if you drive the vehicle?

What does this warning light on the instrument panel mean?

www.drivingtheorytest.uk - Vehicle condition - What does this warning light on the instrument panel mean? You should be familiar with all warning lights and buzzers fitted to your vehicle. If you're driving the vehicle for the first time, make sure that you know the function of each. If the brake warning light shows a fault in the system, stop as soon as it's safe to do so. Report the fault, and don't continue until it's been corrected.

You're driving a three-axle double-deck bus and have the steering turned onto full lock. What should you do to avoid rear tyre scrub?

What's the purpose of a preheating device?

www.drivingtheorytest.uk - Vehicle condition - What's the purpose of a preheating device? Most diesel engines have glow plugs to preheat the combustion chambers, so helping the engine to start when it's cold. When the ignition is switched on, the preheat warning lamp will show and the glow-plugs will rapidly heat up.
In cold weather, the starter should only be operated when the glow plugs reach operating temperature and the warning light goes out.

What should you do before changing a wheel on your vehicle?

When should anti-freeze be used in the cooling system?

What should you do before stopping a turbocharged engine?

How can you check the age of a tyre fitted to your vehicle?

While driving, your engine-oil warning light comes on. Why could it be dangerous to continue driving?

In very cold weather, moisture can freeze in your vehicle's air storage tanks. What can you do to help prevent this from happening?

Before starting a journey, you want to check your brake-system warning lights. What can you do when these aren't operated by the ignition switch?

What's the most likely reason for a diesel-engined vehicle running erratically in very cold weather?

Which tool is essential for fitting a road wheel?

What could happen if you overfill your engine with oil?

What does it mean if the ignition warning light comes on while you're driving?

www.drivingtheorytest.uk - Vehicle condition - What does it mean if the ignition warning light comes on while you're driving? The ignition light should go out when the engine has started. If it fails to go out or comes on while you're driving, it means that there's an electrical fault of some kind.

What proportion of the width of a tyre must have at least the legal minimum depth of tread?

What's the purpose of the oil filter?

Why is it important to avoid overfilling the engine with oil?

Some buses have different-sized wheels on the front and rear. What do you need to be aware of when driving at high speeds on long journeys?

When can 'selective' or 'block' gear changing be used?

Why do air tanks on brake systems need to be drained?

What do heated fuel lines prevent?

You've had to change a wheel on your vehicle. When should the wheel nuts be checked again?

You're driving at night on a very busy road when your headlights fail. What should you do if the fuse box is on the outside of the bus, on the right-hand side?

What's it advisable to do when you replace a tubeless tyre?

You're driving a three-axle double-deck bus. Why should you take extra care when using full steering lock?

What must vehicle operators provide for their drivers?

What does this warning light on the instrument panel mean?

www.drivingtheorytest.uk - Vehicle condition - What does this warning light on the instrument panel mean? You should be familiar with all the warning lights fitted to your vehicle. The oil warning light indicates low oil pressure or lack of oil. If it lights up, report the fault and don't continue until it's been corrected.

Where does a high-pressure fuel injector deliver fuel?

What could happen if there isn't enough oil in your engine?

You're about to start a long journey midway through the day. What should you do if you notice that the sidelights work but the headlights are faulty?

The Driver and Vehicle Standards Agency (DVSA) and the police carry out spot checks for faulty vehicles. What will happen to the vehicle if serious defects are found?

A tyre has been replaced on your vehicle. What precautions should be taken when tightening the wheel nuts?

How frequently should a driver carry out a walk-round check?

Before each journey, you should check all warning lights. What should you do if a warning light remains lit?

When should you check the oil level in your engine?

On your daily walk-round check, you see that one front tyre is more than 10 years old. What should you do before using the vehicle?

What should you do if thick black smoke is coming from the exhaust of your vehicle?

Why are frequent tyre checks advisable on a tri-axle double-deck vehicle?

www.drivingtheorytest.uk - Vehicle condition - Why are frequent tyre checks advisable on a tri-axle double-deck vehicle? On multi-axled vehicles, the inside wheels on the rear twin-axle are the most difficult to check for punctures and damage. A deflated tyre will transfer the weight to the second tyre of the twin-axle pair. This will overload it and could cause it to burst.

The bus you're driving is fitted with automatic transmission. When would you use kickdown?

You're checking your vehicle's tyres before starting a long motorway journey. What check should be made on each tyre?

You're driving a double-deck bus. What's the minimum depth of tread required over three-quarters of each tyre's width?

What should you do if the brake pedal becomes hard to press?

Your coach often tows a trailer. How often should you check the trailer tyres for pressure?

A passenger tells you they've noticed that a wheel nut is missing from your bus. How often should you check your vehicle's wheel nuts?

At a Driver and Vehicle Standards Agency (DVSA) roadside check, your vehicle is found to have serious defects and you may no longer use it. Who will DVSA share this information with?

What should you do before uncoupling your trailer?

Your vehicle has broken down at night on a two-way road. How should you try to leave the vehicle?

What should you regularly check on the tyres of your bus?

What should you do if your power-assisted steering fails suddenly?

What would be illegal?

Why should your engine oil be changed at the recommended intervals?

When would you use 'kickdown' on a vehicle that has automatic transmission?

Where can you get advice to help carry out minor repairs?

Bus and lorry tyres have codes on their side walls. What do these codes refer to?

You hit the kerb at speed. What part of your vehicle should you check for damage?

A loud buzzer sounds in your vehicle. What's this most likely to indicate?

What's the advantage of energy-saving tyres?

You're checking your vehicle. What should you do if you discover an air leak in the braking system?

What happens to diesel fuel when it gets hot?

Why should you carry out a daily walk-round check before setting off?

On motorways, you're usually driving at higher speeds for long distances. What effect can this have on your tyres?

Why are energy-saving tyres effective?

What will happen if you follow a regular vehicle maintenance schedule?

Where can you get advice about carrying out repairs to your vehicle?

Your coach is fully laden. What's the most likely reason for the steering feeling heavy?

What should you do if you notice that two wheel nuts are missing from one of the wheels on your vehicle?

What can you add to diesel fuel to prevent it from becoming less effective at low temperatures?

You're driving a six-wheeled double-deck bus. What do you need to know about punctures on the rear tyres?

When should you check the wheel nuts on your vehicle?

When should the driver of a coach wear gloves?

What's most likely to cause a burst tyre?

Why should you check your tyres more frequently on a coach with three axles?

What do the codes shown on the side walls of bus and lorry tyres refer to?

How can vehicle breakdowns be reduced?

You've stopped on a firm, level surface. What's the first thing you must do before you uncouple the trailer?

You discover that one of your rear brake-light bulbs has failed. How soon should it be replaced?

What could happen if you overfill your engine with oil?

What's the most likely cause if your steering starts to feel heavy?

What should you do when you park a vehicle that's fitted with a turbocharger?

What should you do if you notice that your coach's right rear indicator isn't working?

Where should you park your vehicle before checking the engine oil level?

You're driving along a motorway. What should you do if the air-pressure warning device starts to operate?

Why should you use an approved coolant solution in your engine's cooling system?

Your steering suddenly becomes heavy to turn. What could make this happen?

What will result from having over-inflated tyres?

Your vehicle suffers a tyre blow-out. How could this create a hazard for other road users?

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