3.1. Determining Haul Time from Performance Chart

Try these first

1. 1.

   Define haul time.

   Hint

   Think about the stages involved in transporting materials.

2. 2.

   What is gravimetric capacity?

   Hint

   Consider what happens if this limit is exceeded.

3. 3.

   What does haul time consist of?

   • Loading and unloading only
   • Loading
   • hauling
   • dumping
   • and return
   • Only dumping time

   Hint

   Think about all steps a truck takes during its operation.

4. 4.

   True or False: Overloading a truck can lead to increased tire wear.

   • True
   • False

   Hint

   Recall the relationship between weight and mechanical stress.

5. 5.

   A construction site requires 15 cubic meters of gravel to be moved every hour. Each truck can hold 7.5 cubic meters, and the loader operates at 2 minutes per load. Determine the number of trucks required to meet this demand, ensuring they operate within safety limits for gravimetric capacity.

   Hint

   Use the demand and truck capacity to derive the required number of trips.

6. 6.

   A truck is loaded with sand having a density of 120 lbs/ft³. If the truck's gravimetric capacity is 10,000 lbs, calculate the maximum volume of sand that can be loaded.

   Hint

   Think about how to express the relationship between weight and volume!