Practice Calculating Required Power Using Performance Charts (2.2) - Effect of Altitude on Engine Performance

Practice: Calculating Required Power Using Performance Charts

Lesson 2.2Effect of Altitude on Engine Performance

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10 questions

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6 questions · about 4 min · pass mark 70%. Hints available.
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Quiz
4 questions · about 3 min · pass mark 70%. Hints available.
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6 sample questions

Question 1.
What happens to air density as altitude increases?
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Think about the atmosphere and how it changes with height.
Question 2.
What is a turbocharger?
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Consider what happens to air as it gets compressed.
3Question 3.
How does altitude affect internal combustion engine performance?
- It increases the horsepower output
- It has no effect at all
- It decreases the horsepower output
- It only affects the fuel quality
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Think about what happens to air density at higher altitudes.
4Question 4.
True or False: A turbocharger is unnecessary for engines operating at sea level.
- True
- False
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Consider why we might need such devices.
Question 5.
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.
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Use the chart to find where the lines intersect based on your total resistance.
Question 6.
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?
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Reflect on the decrease in power output and connect it to altitude effects.

6 more questions in this section. Enroll free to practise them all.