Practice Next Steps: Earthmoving Equipment Discussion (5.2) - Effect of Altitude on Engine Performance

Practice: Next Steps: Earthmoving Equipment Discussion

Lesson 5.2Effect of Altitude on Engine Performance

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9 questions

Flashcard drill
2 cards from this section. Quick, good the night before a test.
Exercise
6 questions · about 4 min · pass mark 70%. Hints available.
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Quiz
3 questions · about 2 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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Consider what happens to air when you go higher.
Question 2.
What is the purpose of a turbocharger?
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Think about what a turbocharger does to air.
3Question 3.
What is the relationship between altitude and engine horsepower?
- Horsepower increases
- Horsepower decreases
- Horsepower remains constant
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Consider how air density affects combustion.
4Question 4.
Turbochargers are used to:
- True
- False
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Remember the function of a turbocharger.
Question 5.
If an earthmover has a standard horsepower of 150 at sea level, calculate its expected horsepower at a height of 9,000 feet where the air density drops to about 70% of that at sea level. Show your calculations.
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Use the percentage reduction in air density to assess horsepower.
Question 6.
Discuss the implications of using a machine rated for sea level performance at high altitude without adjustment for conditions. Highlight three potential issues.
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Think about the engine's air-fuel mixture and performance.

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