LGV Test - 26

LGV Test - 26
You need 17 out of 20 to pass this test
Start test

LGV Test - 26

Question 1 of 20

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

Stop immediately in the lane you are in

Continue slowly to the next service area

Stop on the hard shoulder as soon as possible

Leave the motorway at the next exit

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Question 2 of 20

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

The oil pressure is low

There's an electrical fault

The air pressure is low

There's a hydraulic fault

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Question 3 of 20

What's the purpose of a preheating device?

To heat the cab

To heat the gearbox

To heat the engine

To heat the seat

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Question 4 of 20

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?

Look for a check switch on the dashboard

Get someone behind to check your brake lights

Check them at the end of your journey

Pump the brake pedal a number of times

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Question 5 of 20

What's the minimum depth of tread required over three-quarters of the breadth of a lorry tyre?

1 mm

1.5 mm

2.5 mm

5 mm

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Question 6 of 20

What's the final thing you should do after recoupling a trailer?

Connect the brake lines

Release the trailer parking brake

Connect the electrical lines

Raise the trailer legs

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Question 7 of 20

What could happen if you overfill your engine with oil?

Loss of power

Lower emissions

Better handling

Longer service intervals

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Question 8 of 20

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

They'll be more likely to overheat and disintegrate

They'll have lower rolling resistance

They'll need less air pressure

They'll become very slippery

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Question 9 of 20

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

On sloping ground

On a steep gradient

On level ground

On a downhill slope

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Question 10 of 20

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

An uneven road surface

A loss of air brake pressure

A faulty parking brake

A fault with the power-assisted steering

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Question 11 of 20

What's the advantage of energy-saving tyres?

Greater tread depth

Reduced rolling resistance

Less tread depth

Increased rolling resistance

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Question 12 of 20

What is the fifth wheel coupling used for?

To connect the tractor unit to the trailer

To support the trailer when detached

To prevent the trailer from jack-knifing

To attach air lines to the trailer

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Question 13 of 20

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

Drive slowly to the nearest garage

Check the leak from time to time on your journey

Leave it parked and report it immediately

Start your journey and report it on your return

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Question 14 of 20

What could happen if you overfill your engine with oil?

The handling may improve

Exhaust emissions could be reduced

Some gaskets might be damaged

You could wait longer before the next service

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Question 15 of 20

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

The endurance brake engaging

The air conditioning not working

The speed limiter operating

The fuel partly solidifying

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Question 16 of 20

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?

Don't drive until they are mended

Drive only until light begins to fade

Avoid driving on motorways after dark

Drive only if the weather is good

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Question 17 of 20

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

It may run faster

It may break down

It may use less fuel

It may produce more power

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Question 18 of 20

What should you check before you drive off a muddy building site onto the road?

The diff-lock is disengaged

The diff-lock is engaged

The steering lock is engaged

The twist lock is disengaged

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Question 19 of 20

What happens to diesel fuel when it gets hot?

It expands

It liquefies

It shrinks

It waxes

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Question 20 of 20

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

To change gear down only

To change gear up only

To change gear to a low speed only

To change gear either up or down