CPC Road Safety 2 — Questions and Answers
Question 1: By how much can stopping distances increase when driving on ice compared to a dry road?
- Twice as far
- Five times as far
- Up to ten times as far (Correct answer)
- Three times as far
Correct answer: Up to ten times as far
On ice, stopping distances can increase by up to ten times compared to a dry road, making reduced speed and increased following distance essential.
Question 2: What is the primary danger when a high-sided vehicle passes under a bridge?
- Aerodynamic turbulence disrupting stability
- Striking the structure if the vehicle exceeds the height restriction (Correct answer)
- Loss of satellite navigation signal
- Reduced engine efficiency on approach
Correct answer: Striking the structure if the vehicle exceeds the height restriction
The driver must verify the vehicle's height is within the bridge restriction before passing under it to avoid a serious collision.
Question 3: When is a large vehicle most likely to create a dangerous bow wave affecting pedestrians and cyclists?
- When stationary at the kerb
- When travelling at speed through standing water (Correct answer)
- When braking heavily in rain
- When travelling uphill slowly
Correct answer: When travelling at speed through standing water
At speed, a large vehicle displaces water violently outward, creating a bow wave that can drench and destabilise vulnerable road users nearby.
Question 4: Where should a professional driver be especially alert for motorcyclists when operating a large vehicle?
- Only on motorways and dual carriageways
- In mirrors and blind spots, particularly when turning (Correct answer)
- Only during poor weather or low-visibility conditions
- Only when travelling above 40 mph in urban areas
Correct answer: In mirrors and blind spots, particularly when turning
Motorcyclists can enter a large vehicle's blind spots undetected and are at severe risk if struck during a turn — constant mirror checks are essential.
Question 5: What is the main benefit of an Anti-lock Braking System (ABS) when activated?
- It stops the vehicle in the shortest possible distance regardless of conditions
- It prevents wheel lock-up so the driver can steer while braking (Correct answer)
- It automatically applies maximum braking force at all four wheels
- It applies the parking brake to assist in emergency stops
Correct answer: It prevents wheel lock-up so the driver can steer while braking
ABS prevents the wheels from locking during heavy braking, allowing the driver to maintain directional control and steer around obstacles.
Question 6: How does carrying a full load affect the braking distance of a commercial vehicle?
- It decreases braking distance due to increased traction
- It has no significant effect on braking distance
- It significantly increases braking distance due to greater momentum (Correct answer)
- It only increases braking distance on wet or slippery surfaces
Correct answer: It significantly increases braking distance due to greater momentum
A fully laden vehicle carries far greater momentum than an empty one, requiring a much longer distance to stop under the same braking force.
Question 7: What is the safest action to take if you feel drowsy while driving a commercial vehicle?
- Open the window and turn up the radio to stay alert
- Pull over safely at the earliest opportunity and rest (Correct answer)
- Drink a caffeinated drink at the next services and continue
- Reduce your speed and drive slowly to your destination
Correct answer: Pull over safely at the earliest opportunity and rest
Stopping and resting is the only safe response to driver drowsiness, as no other measure reliably restores the level of alertness required for safe driving.
CPC Road Safety 2
By how much can stopping distances increase when driving on ice compared to a dry road?