2.2 - Calculating Required Power Using Performance Charts
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Practice Questions
Test your understanding with targeted questions
What happens to air density as altitude increases?
💡 Hint: Think about the atmosphere and how it changes with height.
What is a turbocharger?
💡 Hint: Consider what happens to air as it gets compressed.
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Interactive Quizzes
Quick quizzes to reinforce your learning
How does altitude affect internal combustion engine performance?
💡 Hint: Think about what happens to air density at higher altitudes.
True or False: A turbocharger is unnecessary for engines operating at sea level.
💡 Hint: Consider why we might need such devices.
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Challenge Problems
Push your limits with advanced challenges
A bulldozer is working at 2000 meters elevation with a gross weight of 9000 kg. If the estimated grade resistance is 10% and the rolling resistance is 5%, calculate the total resistance and show how to derive the required power from the performance chart.
💡 Hint: Use the chart to find where the lines intersect based on your total resistance.
A certain machine's performance at sea level shows a rimpull of 1000 kg, while at 3000 m altitude, it drops to 700 kg. If the vehicle's resistance is calculated at 12%, how can you adjust your calculations for efficiency loss?
💡 Hint: Reflect on the decrease in power output and connect it to altitude effects.
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