3. Rimpull and Performance Analysis

Try these first

1. 1.

   What is rimpull?

   Hint

   Think of it as the pulling strength of the machine.

2. 2.

   How is the productivity of a scraper calculated?

   Hint

   Remember the formula includes the number of scrapers and their efficiencies.

3. 3.

   What is the productivity rate achieved with five scrapers?

   • 636.89 bank cubic meters/hour
   • 723.36 bank cubic meters/hour
   • 500 bank cubic meters/hour

   Hint

   Review the production calculations from the section.

4. 4.

   Is rimpull essential for the performance of a scraper?

   • True
   • False

   Hint

   Think about the forces involved in scraper operation.

5. 5.

   Calculate the maximum usable rimpull for a scraper with a gross weight of 80,000 kg and a coefficient of traction of 0.6. Assume 50% weight on powered wheels.

   Hint

   Be sure to calculate the weight on the drive wheels before determining usable rimpull.

6. 6.

   If a scraper can produce 700 bank cubic meters/hour and the cost per unit is ₹50, what would be the total cost of moving 1,400 bank cubic meters?

   Hint

   Think about how to correlate total volume with cost.