Examkin

Skidding Causes and Correction

15 soru

Tüm türler15Çoktan seçmeli7Doğru / Yanlış4Sıralama4
Soru 1Soru →

When driving in poor weather conditions, which driver action is most likely to cause a vehicle to skid?

Cevabı ve açıklamayı göster

Cevap: Making sudden or harsh steering and braking inputs

Cevap

Making sudden or harsh steering and braking inputs is the action most likely to cause a skid.
Skidding is almost always caused by driver error. Making sudden, violent, or harsh inputs with the brakes, steering wheel, or accelerator forces the tyres beyond their grip limits, causing them to slide across the road surface.

Adım Adım Çözüm

1
Identify the primary physical cause of a skid
A skid occurs when the physical demand placed on the tyres exceeds the available grip between the tyres and the road surface.
Tyres have a finite threshold of adhesion, which is further reduced in poor weather.
2
Evaluate the effect of sudden control inputs versus smooth driving techniques
Sudden or aggressive actions (heavy braking, sharp steering, abrupt throttle application) demand immediate grip shifts that break traction.
Smooth, progressive control inputs distribute forces gradually and maintain tyre grip.
3
Select the option describing harsh control inputs
Harsh steering and braking inputs are identified as the direct driver cause of skidding.
Driver error through abrupt control inputs is the leading cause of skidding on UK roads.

Anahtar Kavram

Skids are primarily caused by driver error involving excessive speed or sudden, harsh control inputs that exceed available tyre grip.
Tahmini Süre:45s
Soru 2Soru →

While negotiating a turn on a wet road, the rear of your car loses grip and begins to slide to the left. In what sequence should you carry out the following actions to safely correct the skid and resume driving?

Öğeleri doğru sıraya koymak için sürükleyin

Cevabı ve açıklamayı göster

Cevap

The correct sequence is to release the accelerator pedal smoothly without braking, turn the steering wheel to the left into the direction of the skid, centralise the steering wheel as the vehicle straightens, and finally apply gentle acceleration once the vehicle is fully stabilised.
When the rear of a vehicle slides to the left, the driver must first release the accelerator to reduce rotational force and help the tyres regain grip without inducing wheel lockup from braking. The driver must then steer into the direction of the slide (to the left) to align the front wheels with the slide. As the vehicle begins to straighten, the steering must be centralised promptly to prevent a secondary slide in the opposite direction, after which gentle power may be restored.

Adım Adım Çözüm

1
Ease off the accelerator pedal immediately while keeping off the footbrake.
Engine power to the driving wheels is cut and vehicle weight shifts smoothly forward.
Harsh braking or sudden throttle changes further break tyre adhesion on slippery surfaces.
2
Steer into the skid by turning the steering wheel to the left.
The front wheels point along the vehicle's true path of motion.
This counters the rotational force and arrests the sliding rear end.
3
Straighten the steering wheel as the rear wheels grip the road.
The car aligns smoothly with the intended line of travel.
Holding the steering angle too long causes an over-correction and a violent slide in the opposite direction.
4
Reapply gentle, smooth throttle.
Stable forward progress is re-established.
Gradual acceleration settles the chassis once the tyres have fully regained grip.

Anahtar Kavram

Correcting a rear-wheel skid through smooth pedal and steering control
Tahmini Süre:45s
Soru 3Soru →

As you travel along a dual carriageway during a heavy downpour, your car begins to aquaplane across standing water, causing the steering wheel to feel completely weightless and unresponsive. What should you do to safely regain control?

Cevabı ve açıklamayı göster

Cevap: Ease off the accelerator gradually and hold the steering wheel straight until grip is restored

Cevap

Ease off the accelerator gradually and hold the steering wheel straight until grip is restored
When a vehicle aquaplanes, the tyres lose direct contact with the road and ride on a wedge of water. The safest course of action is to ease off the accelerator gently and maintain a straight steering path. As speed reduces, the tyre grooves can displace the standing water, restoring normal grip and steering control smoothly.

Adım Adım Çözüm

1
Recognise the symptoms of aquaplaning
Identify that the tyres are riding on a film of water due to light steering and engine revs increasing without acceleration
Correct identification prevents panic reactions such as slamming on the brakes or jerking the steering wheel
2
Remove foot pressure smoothly from the accelerator pedal
Vehicle speed gradually reduces without sudden weight transfer or wheel locking
Allows the weight of the vehicle to settle and gives the tyre tread grooves time to disperse the standing water
3
Maintain a steady, straight steering direction
The front wheels remain aligned with the direction of travel when tyre contact is re-established
Prevents violent lateral movement or sudden skidding the moment the tyres regain grip on the road surface

Anahtar Kavram

Aquaplaning occurs when water builds up between tyres and the road surface, causing total loss of steering and braking; recovery requires smooth deceleration without harsh braking or steering inputs.
Tahmini Süre:1m 0s
Soru 4Soru →

You are driving a car without anti-lock brakes (ABS) on a slippery road when sudden braking causes all four wheels to lock, resulting in a straight-line skid. In what sequential order should you carry out the following actions to recover steering control and bring the vehicle safely to a halt?

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Cevabı ve açıklamayı göster

Cevap

The correct sequence is to first release the footbrake completely, align the steering wheel straight ahead, reapply gentle progressive braking, and finally steer smoothly towards a safe stopping position.
When harsh braking locks the wheels on a slippery road in a car without ABS, the driver must first release the brake pedal completely to allow the tyres to rotate again and restore grip. Straightening the wheels ensures the car does not spin when traction returns. After rolling grip is recovered, applying gentle progressive braking reduces speed, allowing the driver to smoothly steer to a safe halt.

Adım Adım Çözüm

1
Release the footbrake pedal completely.
The locked wheels begin turning and regain rolling contact with the road surface.
A sliding, locked tyre cannot generate cornering forces or directional control; rolling friction must be restored first.
2
Ensure the steering wheel is pointing straight in the direction of vehicle momentum.
The vehicle's chassis remains balanced and stable.
If the front wheels are turned sideways when grip suddenly returns, the car will pitch violently into a severe rotational skid.
3
Apply gentle, progressive or cadence braking without locking the wheels again.
The vehicle sheds speed in a stable, controlled manner.
Carefully modulating the brake pedal maximizes stopping power while keeping the tyres within their limit of adhesion.
4
Guide the car with calm steering inputs to a safe location.
The vehicle comes to a complete, secure stop.
Full steering authority is safely utilized once speed is under control.

Anahtar Kavram

Locked-wheel skid recovery and brake modulation in non-ABS vehicles
Tahmini Süre:1m 0s
Soru 5Soru →

What is the safest way to avoid skidding when driving on a road covered with packed snow or ice?

Cevabı ve açıklamayı göster

Cevap: Drive slowly in the highest gear possible and use smooth, gentle control inputs

Cevap

Drive slowly in the highest gear possible and use smooth, gentle control inputs
Driving slowly in the highest gear practical reduces wheel torque and prevents wheel spin on slippery surfaces. Using smooth, progressive inputs on the steering wheel, accelerator, and brakes preserves tyre adhesion and prevents skidding.

Adım Adım Çözüm

1
Assess the severe reduction in tyre grip caused by packed snow or ice.
Recognise that sudden forces applied through braking, acceleration, or steering will easily break traction.
Tyre friction on ice is extremely low compared to dry tarmac, making smooth handling essential.
2
Select a higher gear than normal while keeping speed low.
Lower engine revs and reduced wheel torque minimise the risk of wheel spin when applying power.
Driving in the highest gear possible delivers smooth, controlled power to the driven wheels.
3
Operate all foot pedals and the steering wheel progressively and gently.
The vehicle maintains directional stability without inducing a skid.
Sudden or aggressive driver inputs are the primary cause of skidding on slippery road surfaces.

Anahtar Kavram

Skid prevention in icy and snowy conditions using smooth vehicle controls and appropriate gear selection
Tahmini Süre:45s
Soru 6Soru →

When a vehicle begins to skid on a slippery road, applying sudden and harsh pressure to the footbrake helps restore steering control.

Cevabı ve açıklamayı göster

Cevap: False

Cevap

False. Applying sudden, harsh braking during a skid worsens the loss of traction and removes steering control.
The statement is false because applying sudden, heavy braking when a car is skidding removes any remaining tyre grip, preventing steering control. According to DVSA guidance, drivers must release the footbrake and steer smoothly into the direction of the slide to regain control.

Adım Adım Çözüm

1
Analyze the mechanical effect of harsh braking during a skid.
Sudden hard braking overpowers tyre grip and causes the wheels to lock or slide.
Tyres that are sliding or locked have zero directional steering capability.
2
Identify the standard DVSA skid recovery procedure.
The driver must release the footbrake and steer smoothly into the direction of the skid.
Releasing brake pressure allows the tyres to rotate again and re-establish grip with the road surface.
3
Evaluate the statement in the stem.
The statement claims harsh braking restores steering control, which is false.
Harsh braking causes a complete loss of steering control rather than restoring it.

Anahtar Kavram

Skid correction techniques and braking dynamics
Tahmini Süre:40s
Soru 7Soru →

You are driving an ABS-equipped vehicle on a wet road. As you negotiate a left-hand bend, the rear of your vehicle loses grip and begins to slide outwards towards the right. What is the correct immediate sequence of actions to regain control?

Cevabı ve açıklamayı göster

Cevap: Remove your feet from the accelerator and brake pedals, and turn the steering wheel to the right.

Cevap

The correct action is to remove your feet from all pedals and turn the steering wheel to the right.
To correct a rear-wheel skid, you must steer in the same direction that the rear of the vehicle is sliding (in this case, to the right). Crucially, you must also remove your feet from both the accelerator and brake pedals. Braking during a skid transfers the vehicle's weight forward, reducing downforce on the rear wheels and worsening the slide. Releasing the pedals allows the tyres to use their maximum available friction for lateral grip to straighten the vehicle.

Adım Adım Çözüm

1
Identify the type and direction of the skid.
The rear of the vehicle is sliding to the right (oversteer).
Knowing the direction of the skid determines which way you must steer to regain control.
2
Determine the correct steering input.
You must steer to the right.
Steering into the skid (in the same direction the rear is sliding) helps to align the front wheels with the direction the vehicle is travelling, restoring balance.
3
Determine the correct pedal input.
Remove your feet from all pedals (accelerator and brake).
Braking or accelerating requires grip. By releasing the pedals, you allow the tyres to use all their available friction solely for lateral grip to stop the slide. Braking would transfer weight forward, making the rear even lighter and worsening the skid.

Anahtar Kavram

Skid correction requires removing all pedal inputs and steering into the direction of the skid, regardless of whether the vehicle is equipped with ABS.
Tahmini Süre:1m 0s
Soru 8Soru →

As you guide your car around a bend contaminated with a sudden diesel spillage, the front wheels lose adhesion, causing understeer where the vehicle continues pushing straight ahead despite your steering input. In what sequence should you carry out the following corrective actions to restore steering control?

Öğeleri doğru sıraya koymak için sürükleyin

Cevabı ve açıklamayı göster

Cevap

The correct sequence begins with smoothly easing off the accelerator without harsh braking, followed by reducing excessive steering lock towards straight-ahead, waiting for the front tyres to regain grip, and finally re-applying smooth steering towards the intended line of travel.
When front-wheel skid (understeer) happens, the front tyres have lost grip due to excessive speed, reduced surface friction, or excessive steering angle. Easing off the throttle reduces tyre load, while unwinding the steering wheel decreases the slip angle to allow the rolling tyres to regain grip. Only after traction is re-established should the driver smoothly steer back onto the intended path.

Adım Adım Çözüm

1
Ease off the accelerator smoothly and avoid harsh braking.
Longitudinal tyre demand is minimised and weight transfers gently forward to aid front-tyre contact.
Tyres have a finite friction budget; removing drive or heavy braking force frees up grip for lateral control.
2
Unwind or reduce the steering angle slightly towards straight-ahead.
The slip angle decreases, allowing the tread to rotate effectively rather than scrubbing sideways.
Excessive steering angle exceeds tyre adhesion limits; opening the steering wheel restores rotational contact.
3
Pause momentarily until steering resistance and front-wheel grip return.
Tyre tread channels clear surface film and biting traction is re-established.
Attempting further aggressive inputs before grip returns will only prolong the skid.
4
Progressively re-steer along the curve of the road.
The vehicle smoothly tracks the bend under stable control.
Gradual steering inputs prevent sudden weight transfer and avoid inducing an oversteer reaction.

Anahtar Kavram

Understeer occurs when front tyres exceed their limit of adhesion; correcting it requires removing drive/braking forces and reducing the steering angle to allow tyre tread to re-grip before steering into the bend.
Tahmini Süre:1m 30s
Soru 9Soru →

On an unpaved country lane covered with loose gravel, you brake firmly before a sharp bend in a vehicle without anti-lock brakes (ABS). The front wheels lock up and the vehicle continues travelling straight ahead despite turning the steering wheel. What should you do immediately to regain steering control?

Cevabı ve açıklamayı göster

Cevap: Release the footbrake smoothly so the front tyres can rotate and regain directional grip

Cevap

Release the footbrake smoothly so the front tyres can rotate and regain directional grip
When front wheels lock under braking on a low-adhesion surface, they lose the lateral grip needed to steer. Releasing the footbrake allows the tyres to rotate freely again, restoring contact adhesion so the driver can steer in the intended direction.

Adım Adım Çözüm

1
Identify the type of skid and mechanical cause
The front wheels have locked under heavy braking on loose gravel, resulting in understeer where the vehicle slides straight ahead.
Tyres that are locked and skidding across a loose surface cannot generate the lateral friction necessary to change direction.
2
Release pedal pressure to allow tyre rotation
Removing pressure from the footbrake lets the front wheels start turning again.
Rotating tyres can re-establish adhesion with the road surface and respond to steering inputs.
3
Guide the steering smoothly along the intended line of travel
The vehicle responds to steering angle and safely follows the curve.
Smooth steering inputs prevent secondary skids once directional traction is restored.

Anahtar Kavram

Front-wheel skid correction and understeer recovery in non-ABS vehicles
Soru 10Soru →

If a vehicle begins to understeer on a slippery corner because the front tyres have lost grip, increasing the steering angle will help the front tyres regain adhesion and guide the vehicle around the bend.

Cevabı ve açıklamayı göster

Cevap: False

Cevap

False
The statement is false because increasing steering input when front-wheel traction is already lost increases the slip angle, causing the front tyres to scrub across the road surface rather than rolling and gripping. To correct understeer, the driver should smoothly release the accelerator and slightly decrease the steering angle until the front tyres regain grip.

Adım Adım Çözüm

1
Identify the type of loss of traction occurring at the vehicle's front axle.
The scenario describes understeer, where the front tyres exceed their maximum limit of adhesion and slide straight ahead rather than turning.
Correct recovery depends on understanding which axle has lost grip and how tyre slip angles function.
2
Evaluate the mechanical effect of turning the steering wheel further into the bend.
Increasing the steering lock increases tyre scrub and slip angle beyond the limit of friction, reducing available grip even further.
Tyres require grip to direct vehicle travel; over-rotating the front wheels when traction is lost makes steering completely ineffective.
3
Determine the correct recovery procedure.
The driver must smoothly ease off the accelerator to transfer weight forward and slightly ease off the steering angle until the tyres bite and regain grip.
This establishes that the statement proposing to increase the steering angle is incorrect.

Anahtar Kavram

Understeer dynamics and steering recovery techniques
Tahmini Süre:1m 0s
Soru 11Soru →

Changing down to a lower gear abruptly while travelling on a slippery road can cause the driven wheels to lose traction and trigger a skid.

Cevabı ve açıklamayı göster

Cevap: True

Cevap

True
The statement is true because dropping into a lower gear abruptly causes rapid engine braking. On slippery surfaces where tyre adhesion is already compromised, this sudden rotational resistance can exceed available tyre grip, causing the driven wheels to lock or slide and initiating a skid.

Adım Adım Çözüm

1
Analyze the mechanical force produced by an abrupt downshift.
Releasing the clutch quickly in a lower gear forces the driven wheels to slow down immediately due to engine braking.
The engine's lower rotational speed resists the rotation of the driven axle when engaged in a lower gear.
2
Evaluate the tyre-road friction relationship under slippery conditions.
Low-friction surfaces provide minimal grip, making tyres vulnerable to braking torque.
If the deceleration force transmitted through the drive wheels exceeds the road surface grip threshold, the tyres begin to slide rather than roll.
3
Determine the validity of the statement regarding skid initiation.
The statement correctly identifies abrupt downshifting as an operational cause of skidding.
Skidding is caused by excessive driver inputs relative to available grip, including harsh acceleration, aggressive steering, footbraking, or abrupt engine braking.

Anahtar Kavram

Engine braking and harsh downshifting as a cause of skidding on low-adhesion surfaces
Tahmini Süre:45s
Soru 12Soru →

You are accelerating smoothly away from a junction onto an icy road when the driven wheels suddenly lose traction, causing the rear of the car to slide sideways. What is the correct initial action to regain control of the vehicle?

Cevabı ve açıklamayı göster

Cevap: Ease off the accelerator gently and steer smoothly in the direction of the skid

Cevap

Ease off the accelerator gently and steer smoothly in the direction of the skid
When a vehicle's driven wheels lose grip under acceleration on ice and the rear slides, easing off the accelerator removes excess torque so the tyres can regain traction. Steering smoothly into the direction of the slide brings the front of the vehicle back in line with the rear, stabilizing the vehicle.

Adım Adım Çözüm

1
Identify the cause of the loss of traction
Excessive wheelspin from acceleration on a low-friction icy surface has induced a rear-wheel skid
Recognising the skid type determines the correct mechanical response
2
Release the accelerator pedal smoothly
Engine power to the driven wheels is reduced, allowing tyre treads to regain grip on the road surface
Sudden or continued power inputs maintain wheelspin and prevent adhesion
3
Steer into the slide
The front wheels turn in the direction the rear of the car is sliding, correcting the yaw angle
Aligning the steering with the slide helps the vehicle track straight without overcorrecting

Anahtar Kavram

Skid correction through gentle power reduction and steering into the skid
Tahmini Süre:45s
Soru 13Soru →

While driving on a wet rural road, the rear of your car loses traction and begins to slide outward to the right. In what sequential order should you perform the following actions to safely correct the skid and regain vehicle stability?

Öğeleri doğru sıraya koymak için sürükleyin

Cevabı ve açıklamayı göster

Cevap

The correct procedural order is: first ease off the accelerator without braking, next steer smoothly into the direction of the skid (to the right), then straighten the steering wheel as the car realigns, and finally resume gentle acceleration once full control is regained.
When the rear of a vehicle skids to the right (oversteer), the initial priority is to eliminate forces disrupting tyre grip by releasing the accelerator without braking. The driver must then steer smoothly into the direction of the skid (to the right) to arrest the yaw rotation. As the tyres regain adhesion and the car straightens, the steering must be centered immediately to prevent a secondary slide. Finally, gentle power can be applied once full directional control is established.

Adım Adım Çözüm

1
Remove foot from the accelerator pedal without touching the brake pedal.
Excess driving torque is removed from the slipping tyres without inducing wheel lock.
Tyres have a limited envelope of grip; removing acceleration and braking loads frees up available traction for directional control.
2
Turn the steering wheel smoothly towards the right, matching the direction of the rear slide.
The front wheels align with the vehicle's momentum, arresting the lateral rotation.
Steering into the slide counters oversteer and prevents the back of the car from overtaking the front.
3
Return the steering wheel to the straight-ahead position as the vehicle recovers.
The vehicle settles squarely in its lane without pendulum oscillation.
Failing to straighten the wheel promptly as traction returns causes a violent snap-back skid in the opposite direction.
4
Reapply light, progressive throttle once the vehicle is completely straight and stable.
Forward momentum is restored with balanced weight distribution.
Smooth power application maintains chassis balance once all four tyres have recovered normal adhesion.

Anahtar Kavram

Oversteer Skid Recovery and Counter-Steering Procedure
Tahmini Süre:1m 0s
Soru 14Soru →

When performing an emergency stop on a wet road in a vehicle fitted with anti-lock brakes (ABS), you should rapidly pump the brake pedal to prevent the wheels from locking and maintain steering control.

Cevabı ve açıklamayı göster

Cevap: False

Cevap

False
The statement is false because vehicles equipped with anti-lock brakes (ABS) require firm, sustained pressure on the footbrake pedal during emergency braking. ABS automatically senses when wheels are about to lock and modulates brake fluid pressure rapidly to allow the driver to steer while braking. Manually pumping the pedal interrupts this automated process and increases the overall stopping distance.

Adım Adım Çözüm

1
Identify the vehicle's braking configuration and the road conditions described in the scenario
The vehicle is equipped with anti-lock brakes (ABS) operating on a slippery, wet road surface during an emergency stop.
Different braking systems require fundamentally different driver inputs during emergency braking and skid prevention.
2
Evaluate how ABS functions during hard braking on low-friction surfaces
ABS automatically monitors wheel rotation and modulates brake pressure multiple times per second when sensors detect impending wheel lock-up.
Automated pulsing prevents wheels from locking while preserving directional steering control.
3
Determine the correct driver action for an ABS-equipped vehicle
The driver should depress the brake pedal firmly and keep it fully applied until the vehicle stops.
Manually releasing or pumping the footbrake deactivates and resets the ABS cycle, significantly increasing stopping distance and destabilising the car.

Anahtar Kavram

ABS Operation and Emergency Braking Technique
Tahmini Süre:45s
Soru 15Soru →

You are approaching a sharp bend on a wet road. Why is it important to complete all necessary braking before you start turning the steering wheel?

Cevabı ve açıklamayı göster

Cevap: Demanding both braking and steering forces simultaneously increases the risk of the tyres losing grip and skidding.

Cevap

Demanding both braking and steering forces simultaneously increases the risk of the tyres losing grip and skidding.
Tyres have a finite amount of grip available to transfer forces between the car and the road surface. In wet conditions, the total available grip is reduced. If you attempt to brake heavily and steer at the same time, the combined lateral and longitudinal forces can easily overwhelm tyre adhesion, causing the vehicle to slide. Completing all necessary braking in a straight line before turning ensures that full grip is available to steer smoothly and safely around the bend.

Adım Adım Çözüm

1
Evaluate the tyre grip demands of individual vehicle control inputs.
Identify that tyres share available friction between longitudinal forces (braking or accelerating) and lateral forces (steering).
Tyres have a finite adhesion envelope that is significantly reduced on wet road surfaces.
2
Sequence the braking and steering actions before negotiating the bend.
Brake smoothly in a straight line to achieve a safe cornering speed before applying steering input.
Separating braking from steering reserves maximum grip for directional control, preventing wheel lock-up and skids.

Anahtar Kavram

Tyre Grip Allocation and Skid Prevention on Bends
Tahmini Süre:1m 0s
Skidding Causes and Correction Alıştırma Soruları — UK Driving Theory Test | Examkin