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PCV CPC Case Study 26

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Sophie, a coach driver, frequently drives on different terrains, including steep hills and sharp bends. She needs to be adept at managing the forces acting on the heavy vehicle, such as inertia, gravity, and cornering force, to ensure passenger safety and comfort. Sophie's focus is on understanding how these forces impact driving dynamics, particularly in terms of acceleration, braking, and steering.

There are 7 multiple choice questions in this PCV CPC case study. Read this carefully and ensure you fully understand the scenario before starting the test. You need to score 6 out of 7 to pass.

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1. How does vehicle weight affect friction, as understood by Sophie? Give one answer
A Affects tyre grip on the road
B No impact on friction
C Only changes fuel consumption
D Reduces the need for braking
Correct Answer: A Affects tyre grip on the road
Explanation: The weight of the vehicle influences the tyre grip on the road through friction.
2. What causes traction loss during sudden braking, in Sophie's experience? Give one answer
A Decreased vehicle weight
B Enhanced steering control
C Improved tyre performance
D Loss of grip between tyre and road
Correct Answer: D Loss of grip between tyre and road
Explanation: Sudden braking can result in a loss of grip between the tyre and the road.
3. Why is more power needed uphill, as Sophie observes? Give one answer
A For better vehicle aesthetics
B Gravity increases resistance
C To improve fuel efficiency
D To reduce tyre wear
Correct Answer: B Gravity increases resistance
Explanation: Gravity increases resistance, requiring more engine power on uphill gradients.
4. In driving dynamics, what does inertia mean for Sophie? Give one answer
A Engine's power output
B Resistance to change in motion
C Tyre's grip level
D Vehicle's speed capability
Correct Answer: B Resistance to change in motion
Explanation: Inertia is the resistance of the vehicle to any change in its state of motion.
5. What is the effect of cornering force on fast bends for Sophie? Give one answer
A Enhanced tyre durability
B Increased vehicle stability
C Passengers thrown towards the bend's outside
D Reduced fuel consumption
Correct Answer: C Passengers thrown towards the bend's outside
Explanation: Cornering force can throw passengers towards the outside of a bend.
6. Why is progressive braking crucial in buses, according to Sophie? Give one answer
A For improving engine performance
B For passenger safety and comfort
C To increase the bus's speed
D To reduce the frequency of stops
Correct Answer: B For passenger safety and comfort
Explanation: Progressive braking is crucial for ensuring passenger safety and comfort.
7. What are the consequences of 'brake fade' for Sophie? Give one answer
A Improved braking responsiveness
B Increased tyre life
C Lower fuel consumption
D Reduced braking effectiveness
Correct Answer: D Reduced braking effectiveness
Explanation: Brake fade' results in reduced effectiveness of the brakes.