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PCV CPC Case Study 27

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Jack, a professional bus driver, regularly faces diverse driving conditions including wet weather and uneven road surfaces. His primary concern is to maintain control of the vehicle while ensuring the safety and comfort of his passengers. Jack needs to understand how various factors like friction, inertia, and kinetic energy play a role in vehicle handling, particularly during acceleration, braking, and cornering.

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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Click on an answer to view the correct choice along with the explanation.

1. How does Jack consider tyre pressure in maintaining vehicle grip? Give one answer
A Alters the vehicle's colour
B Has no impact on grip
C Influences the amount of friction
D Only affects fuel efficiency
Correct Answer: C Influences the amount of friction
Explanation: Tyre pressure directly affects the friction between the tyre and the road.
2. What can Jack expect from a sudden clutch release in low gear? Give one answer
A Enhanced fuel efficiency
B Increased vehicle stability
C Loss of grip on driven wheels
D Reduced engine wear
Correct Answer: C Loss of grip on driven wheels
Explanation: Sudden clutch release in a lower gear can cause loss of grip on the driven wheels.
3. How does Jack manage speed increase on downhill gradients? Give one answer
A Fuel consumption is reduced
B Speed decreases
C Speed tends to increase
D Vehicle becomes more stable
Correct Answer: C Speed tends to increase
Explanation: Due to gravity, a vehicle's speed tends to increase on a downhill gradient.
4. What does Jack understand kinetic energy converts into during braking? Give one answer
A Enhanced engine efficiency
B Heat at the brake pads
C Increased vehicle speed
D Reduced tyre wear
Correct Answer: B Heat at the brake pads
Explanation: Kinetic energy is converted into heat at the brake pads during braking.
5. Why does Jack prioritize smooth acceleration in heavy vehicles? Give one answer
A Improves engine power
B Increases fuel efficiency
C Prevents passengers from being thrown backwards
D Reduces the vehicle's weight
Correct Answer: C Prevents passengers from being thrown backwards
Explanation: Smooth acceleration is important to prevent passengers from being thrown backwards.
6. What does Jack identify as a consequence of heavy braking in corners? Give one answer
A Decreased fuel consumption
B Enhanced tyre life
C Improved passenger comfort
D Strain on tyres and suspension
Correct Answer: D Strain on tyres and suspension
Explanation: Heavy braking while cornering puts excessive strain on tyres and suspension.
7. How does inertia affect a stationary bus, from Jack's perspective? Give one answer
A Enhances vehicle stability
B Increases fuel efficiency
C Reduces the need for braking
D Resistance to start moving
Correct Answer: D Resistance to start moving
Explanation: Inertia causes resistance to the bus starting to move from a stationary position.