LGV Test - 27

LGV Test - 27
You need 17 out of 20 to pass this test
Start test

LGV Test - 27

Question 1 of 20

You're uncoupling a trailer. What must you do before disconnecting any of the air lines?

Drain the air tanks

Apply the trailer parking brake

Lower the landing gear

Disconnect the electrical line

LGV Test - 27

Question 2 of 20

How often should the components of the fifth-wheel coupling be inspected?

Every 3000 miles (5000 km)

Every 6000 miles (10 000 km)

Every 9000 miles (15 000 km)

Every 12 000 miles (20 000 km)

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Question 3 of 20

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

To give quicker acceleration

To apply the emergency brakes

To stop more smoothly

To go down a steep hill

LGV Test - 27

Question 4 of 20

When should wheel nuts be checked?

After driving down a steep hill

Soon after initial tightening

Just after driving on a motorway

After unloading

LGV Test - 27

Question 5 of 20

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

Low oil pressure

Low air pressure

Low tyre pressure

Low fuel level

LGV Test - 27

Question 6 of 20

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


On return to your base

Within five days

At the next service

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Question 7 of 20

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





LGV Test - 27

Question 8 of 20

What do heated fuel lines prevent?

The cab temperature dropping

The radiator from freezing

The windows becoming misty

The diesel from partially solidifying

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Question 9 of 20

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

Air pressure


Valve clearance

Tyre profile

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Question 10 of 20

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?

It will be impounded until a new driver is found

It will be restricted to 30 mph for the remainder of the journey

It will be prohibited from further use until the defects are rectified

It will be ordered back to the depot to unload goods or passengers

LGV Test - 27

Question 11 of 20

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

Continue on to the nearest garage

Return to your depot and report the problem

Stop in a safe place and get help

Drive slowly with your hazard warning lights on

LGV Test - 27

Question 12 of 20

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





LGV Test - 27

Question 13 of 20

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

Scattered debris

Skid marks

Suspension failure

Axle damage

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Question 14 of 20

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

Continue driving to the nearest repair centre

Return to the depot

Continue your journey at a slower speed

Park and get help

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Question 15 of 20

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

The engine will get hot

The engine may be damaged

You will need to have the vehicle serviced

You will need to replace the carburettor

LGV Test - 27

Question 16 of 20

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

On the left of the road

Partly on the pavement

On a grass verge

On the right of the road

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Question 17 of 20

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

Cover the air tanks with a blanket

Drain the tanks daily

Use the brakes frequently

Pump the brakes

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Question 18 of 20

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

It could leave an oil stain on the road

It will increase the amount of exhaust gases

It could increase oil pressure and cause damage

It will damage the exhaust system

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Question 19 of 20

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

Leave the parking brake off

Use chocks if available

Dismantle the wheel and tyre

Get someone to check the other tyres

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Question 20 of 20

What's the main reason for cleaning your wheels and tyres when you leave a building site?

To keep the tyres in good condition

To prevent the tyres from damaging the road surface

So that air pressure will not leak from the tyre valves

To stop mud dropping onto the road