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PCV CPC Case Study 28

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Rachel, a city bus driver, navigates complex urban environments daily, including heavy traffic, frequent stops, and varying road conditions. She must be adept at managing the bus's dynamics, particularly in understanding the effects of inertia, gravity, and friction. Rachel's key focus is on ensuring smooth operations to provide a safe and comfortable journey for her passengers, while also being mindful of the bus's handling characteristics.

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 Rachel manage friction during bus acceleration? Give one answer
A Decreases the vehicle's speed
B Essential for tyre grip on the road
C Has no impact on acceleration
D Only affects fuel consumption
Correct Answer: B Essential for tyre grip on the road
Explanation: Friction is crucial for providing the necessary tyre grip during acceleration.
2. What does Rachel consider about road surface conditions in urban driving? Give one answer
A Affects the vehicle's colour
B Does not affect driving
C Influences the vehicle's grip
D Only changes the noise level
Correct Answer: C Influences the vehicle's grip
Explanation: The road surface condition significantly affects the vehicle's grip due to friction.
3. What concern does Rachel address when shifting to lower gear rapidly? Give one answer
A Enhanced fuel efficiency
B Improved vehicle control
C Increased tyre life
D Potential for wheelspin or skid
Correct Answer: D Potential for wheelspin or skid
Explanation: Shifting too quickly to a lower gear can cause wheelspin or skid due to abrupt force.
4. How does Rachel adjust braking on uphill gradients considering gravity? Give one answer
A Enhances tyre grip
B Increases fuel consumption
C Less braking effort is needed
D Reduces vehicle speed
Correct Answer: C Less braking effort is needed
Explanation: Gravity naturally slows the vehicle on an uphill gradient, requiring less braking effort.
5. How does inertia impact Rachel's handling of a heavy bus? Give one answer
A Enhances braking efficiency
B Increases the speed of the vehicle
C Reduces fuel consumption
D Resists changes in motion
Correct Answer: D Resists changes in motion
Explanation: Inertia causes a heavy vehicle to resist changes in its state of motion.
6. Why does Rachel find progressive braking beneficial in city driving? Give one answer
A Decreases overall vehicle weight
B Enhances the engine's power
C Ensures passenger safety and comfort
D Leads to faster travel times
Correct Answer: C Ensures passenger safety and comfort
Explanation: Progressive braking in buses improves passenger safety and comfort in urban environments.
7. What does Rachel understand happens during 'brake fade'? Give one answer
A Braking effectiveness decreases
B Braking power increases
C Fuel efficiency improves
D Tyre wear reduces
Correct Answer: A Braking effectiveness decreases
Explanation: Brake fade' leads to a decrease in the braking effectiveness of the bus.