5.2. Next Steps: Earthmoving Equipment Discussion

Try these first

1. 1.

   What happens to air density as altitude increases?

   Hint

   Consider what happens to air when you go higher.

2. 2.

   What is the purpose of a turbocharger?

   Hint

   Think about what a turbocharger does to air.

3. 3.

   What is the relationship between altitude and engine horsepower?

   • Horsepower increases
   • Horsepower decreases
   • Horsepower remains constant

   Hint

   Consider how air density affects combustion.

4. 4.

   Turbochargers are used to:

   • True
   • False

   Hint

   Remember the function of a turbocharger.

5. 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.

   Hint

   Use the percentage reduction in air density to assess horsepower.

6. 6.

   Discuss the implications of using a machine rated for sea level performance at high altitude without adjustment for conditions. Highlight three potential issues.

   Hint

   Think about the engine's air-fuel mixture and performance.