3.3. Summary of Key Points

Try these first

1. 1.

   What is the ideal angle at which trucks should be placed relative to the excavator?

   Hint

   Think about how to minimize the angle of swing.

2. 2.

   Define the term 'Angle of Swing'.

   Hint

   It directly affects the excavation process.

3. 3.

   What is the ideal angle of truck placement concerning the excavator?

   • 45 degrees
   • 90 degrees
   • 120 degrees

   Hint

   Look for the angle that minimizes movement.

4. 4.

   True or False: A higher angle of swing increases cycle time.

   • True
   • False

   Hint

   Think about how much time you spend swinging the bucket.

5. 5.

   An excavator has an optimum height of cut of 7 meters, while the actual height it is operating at is 4.5 meters. Calculate the percentage of the optimum height and determine the correction factor needed if the table suggests a correction factor of 0.85 for this height.

   Hint

   Calculate the percentage first, then use the correction factor.

6. 6.

   If the average angle of swing is measured at 130 degrees, how would you modify your productivity estimates based on the provided correction factors for differing angles?

   Hint

   Review swing angles and their corresponding productivity impacts.