4.2. Techniques for Reducing Rolling Resistance

Try these first

1. 1.

   What is the production rate for 5 scrapers if each has a bowl volume of 19.82 bank cubic meters?

   Hint

   Use the production formula provided.

2. 2.

   Define unit production cost.

   Hint

   Think about costs divided by production.

3. 3.

   What is the production rate with 5 scrapers?

   • 500 bank cubic meters
   • 636.89 bank cubic meters
   • 723.36 bank cubic meters

   Hint

   Refer back to the production formula.

4. 4.

   True or False: More scrapers guarantee lower production costs.

   • True
   • False

   Hint

   Consider the examples of costs in variations.

5. 5.

   Given that the cycle time for a scraper is 7.78 minutes and efficiency is 50 minutes, calculate the production for 5 scrapers and discuss why efficiency matters.

   Hint

   Use the efficiency factor to understand its impact on overall productivity.

6. 6.

   Analyze the trade-off between increasing the number of scrapers and cost increase per bank cubic meter. What is your recommendation?

   Hint

   Consider both production benefits and economic factors.