LGV theory practice test 7

Explanation

The differential allows the drive wheels to rotate at different speeds this is necessary for the vehicle to negotiate corners and bends. On a slippery surface, however, it can cause problems if one wheel has less traction, it can spin, resulting in a complete loss of drive. The diff lock prevents the wheels from turning independently and so helps to stop this happening.

Explanation

In high winds, some exposed roads, bridges and viaducts are closed to high-sided vehicles. Plan your route with care and try to avoid these areas. Also plan an alternative route in case of road closure.

Explanation

You must always disengage the diff lock as soon as the vehicle is moving. The differential allows the rear wheels to revolve at different speeds, and this allows the vehicle to follow a curved path. Attempting to turn with the diff lock engaged could result in the vehicle continuing straight on.

Explanation

High sided vehicles such as box vans are affected by side wind, particularly when they're empty. Drivers should slow down and stay alert for other road users affected by the windy conditions.

Explanation

Be aware of, and obey, all speed limits. On a motorway, any lorry that's articulated, towing a trailer, or over 7.5 tonnes mustn't exceed 60 mph 96 km h.

Explanation

Fluids carried in tankers can move in waves as the vehicle's speed or direction changes. This happens particularly when you brake and then ease off the pedal the moving wave of liquid causes the vehicle to surge forward. Baffle plates are designed to reduce this surging effect.

Explanation

If your vehicle hits a bridge, you must report it to the police. If a railway bridge is involved, you must also report it to the railway authority. The phone number is usually shown on or near the bridge.

Explanation

If your vehicle is to be left unattended on a verge, you must first get permission from the police.

Explanation

When recoupling, you must connect the dog clip to secure the kingpin release handle.

Explanation

Some loads need to be transported in special conditions. For example, chilled or frozen foods need to be transported in a refrigeration unit. To drive one of these units, you'll need to be trained in how to use it. You'll also need relevant training in hygiene procedures.

Explanation

The skip should be covered to prevent any part of the load from blowing away. Loose material blown onto the road could be a danger to other road users and can cause environmental damage.

Explanation

Split link and iron chains shouldn't be used to secure loads, as they're less reliable than solid link and steel chains. For more information on the suitability of various sized steel chains, consult the relevant British Standard BS leaflets.

Explanation

Debris falling from vehicles can be very dangerous to other road users, so skips need to be covered when they're transported. Falling debris may also cause environmental damage.

Explanation

Protective clothing will usually be provided by your company. However, it's your responsibility to make sure that you use it properly.

Explanation

A vehicle is most stable when travelling in a straight line under gentle acceleration. Sudden acceleration, steering or braking can cause severe loss of control. For maximum control, keep your driving as smooth as possible.

Explanation

When an enforcement officer keeps a record chart, the driver should ask the officer to sign the back of the replacement chart. They'll need to give their name, telephone number and the number of charts they've kept. The replacement chart must be used to continue the journey. You should always carry more blank charts than you think you'll need.

Explanation

Under EU rules, you must have a minimum daily rest of 11 consecutive hours. However you may reduce this to 9 hours for up to three days in any one week.

Explanation

Vehicles that carry dangerous goods have badges displayed on the side and rear. The badges are orange and show the type of material that's being carried. Make a note of this and report it to the emergency services when you contact them.

Explanation

At the scene of an incident, first make sure there's no danger of further collisions or fire before dealing with any casualties. The priority when dealing with an unconscious person is to make sure they can breathe. This may involve clearing their airway if they're having difficulty or there's an obvious obstruction. Don't remove a motorcyclist's helmet unless it's essential, as you could cause them serious injury.

Explanation

Immediate treatment can help to reduce the effects of shock. Reassure the casualty and try to keep them warm and comfortable. Only move a casualty if it's necessary for their safety.

Explanation

Lift the pedestrian's leg so that the wound is higher than their heart. This should reduce the flow of blood. Check that the limb isn't broken and there's nothing in the wound before applying pressure over it.

Explanation

Moving a casualty could cause further injury, so it's important that this is only done if there's danger to them where they are.

Explanation

As soon as you detect a fault on your vehicle, you must take action. Where faulty brakes are concerned, you need to seek help immediately. Always report minor faults as soon as you detect them. Minor faults can become major ones if they aren't repaired quickly.

Explanation

Before you make a turn or a change of direction, however slight, you should always check the mirrors. If you intend to turn left, check your left-hand nearside mirror first.

Explanation

To make sure it's safe, you must use the mirrors well before you make any manoeuvre. For example, you need to use them before moving off, turning, overtaking, slowing or stopping, opening a door, or changing direction, lanes or speed.

Explanation

If you plan your journey to avoid busy times, you can avoid congestion. That way, your overall journey time may be reduced, so cutting costs and making you a more efficient driver.

Explanation

Using the left-hand lane will make it easier for you to leave the roundabout. If you use the right-hand lane, there could be traffic on your left and in your blind spot when you reach your exit and try to move back to the left.

Explanation

To comply with the law, all lights must be in good working order, even in daylight when they're not being used. Before you set out, make sure that everything is working and get any faulty lights fixed. You may need to use your headlights or other lights if you're delayed or find yourself driving in conditions of reduced visibility.

Explanation

Most diesel engines use a high pressure fuel injector system that will deliver pressurised fuel directly into the combustion chamber of the engine. This system is known as a direct injection engine.

Explanation

EU drivers hours regulations are a series of rules that specify maximum driving time and minimum rest and break periods. These rules are in place to help road safety. Drivers who break them are subject to heavy fines and could lose their licence to drive lorries.

Explanation

If your vehicle is likely to be used by another person while you're away from it, you should take your tachograph chart with you. Your break from driving should be entered on the reverse of the chart.

Explanation

Attempting to drive at normal speeds with the diff lock engaged is dangerous it will severely affect your steering control. The diff lock is designed to be used in slippery conditions, at low speed, when maximum traction is required.

Explanation

When stopping on the left, you should always be aware of pedestrians, particularly if they're close to the edge of the road. The height of your nearside mirror can vary depending on the size and type of vehicle you're driving. If in doubt, approach these situations with caution and stop if necessary.

Explanation

The main causes of lorries shedding their loads are driver errors, such as sudden changes of speed or direction, driving too fast for the conditions, and harsh braking.

Explanation

A kingpin or drawbar lock is a visible and effective deterrent to thieves wishing to steal an unattended trailer.

Explanation

Look well ahead and plan your approach to all junctions. Even if the traffic lights are green, don't go forward if queuing traffic will cause you to block the junction. Be aware of the length of your vehicle and how much space it needs to clear the junction.

Explanation

Projection marker boards must be fitted if the load on your vehicle overhangs by more than 2 metres 6 feet 6 inches. This will help other road users who may not notice the projecting load.

Explanation

If the load isn't covered, rubbish can be blown onto the carriageway. This can cause danger for other road users, as well as environmental damage. It may also lead to legal action against both the driver and the operator.

Explanation

Demountable bodies have legs that can be lowered so that the carrier vehicle can be driven out from underneath the body. This has an advantage over ISO containers, which require some form of crane or lift to remove the container from the trailer.

Explanation

The red emergency line is common to both two line and three line braking systems. Always set the parking brake before disconnecting any brake line.

Explanation

Vehicles such as motorcycles, bicycles and caravans could be blown off course by strong winds. You should be aware that your vehicle could cause additional buffeting when you overtake, so allow them plenty of room.

Explanation

If seat belts are fitted to your lorry, you must wear them. Exemptions are allowed for holders of medical exemption certificates and for delivery drivers when travelling less than 50 metres 162 feet.

Explanation

Hazardous substances in transit are readily identified by a diamond shaped warning label. This label carries other information to identify the type of hazard more specifically, such as.

Explanation

Unless you're on firm, level ground, there's a risk of your lorry overturning when the body is tipped. Before raising the body, check that you're well clear of overhead obstructions such as power lines.

Explanation

The full name of the CMR is the Convention on the Contract for the International Carriage of Goods by Road. You'll need this document to transport goods internationally by road. Of the four copies required, the consignor, consignee and originator all have one copy, and the fourth travels with the vehicle.

Explanation

Before using the crane, it's vital to make sure the vehicle is parked on level ground and the stabilising legs are lowered. This will reduce the risk of the load becoming unstable during lifting. Also check for any overhead cables that may obstruct the crane.

Explanation

When you pass a test to obtain a C or C1 licence, you can tow trailers up to 750 kg. You can do this without taking a further test.

Explanation

Too much weight on an axle can reduce braking efficiency and cause brake fade. As well as being dangerous, exceeding the axle weight limit is an offence that can result in prosecution.