4.2.1. Section-wise Resistance Analysis

Try these first

1. 1.

   What is the unit weight of dry earth soil given in the lecture?

   Hint

   Refer to the section on unit weights.

2. 2.

   What is the average loading time for a scraper?

   Hint

   Look for cycle time information.

3. 3.

   What is the unit weight of dry earth soil?

   • 1600 kg/m³
   • 1700 kg/m³
   • 1660 kg/m³

   Hint

   Refer to the unit weight section.

4. 4.

   True or False: The swell factor for push-loaded scrapers is defaulted to increase by 10%.

   • True
   • False

   Hint

   Consider the impact of additional pressure on the material.

5. 5.

   A scraper has a heaped capacity of 30 m³. If loaded to 90% capacity with a swell factor of 0.85, what is the effective bank volume?

   Hint

   Remember to apply the swell factor after calculating the load volume.

6. 6.

   If one pusher can support 5 scrapers, what should their combined cycle time for optimal efficiency be if each scraper cycles 8 minutes?

   Hint

   Consider how cycle times overlap to maintain constant work.