2. Introduction

Try these first

1. 1.

   What is a scraper used for?

   Hint

   Think of its primary function.

2. 2.

   Define the swell factor.

   Hint

   What does it help to determine?

3. 3.

   What is the primary function of a scraper?

   • Hauling only
   • Loading only
   • Loading
   • hauling
   • and dumping

   Hint

   Think of its full operational cycle.

4. 4.

   True or False: A pusher can function independently of a scraper?

   • True
   • False

   Hint

   What does a pusher rely on?

5. 5.

   Given a scraper with a loading capacity of 25 cubic meters and a cycle time of 8 minutes, find productivity in cubic meters per hour.

   Hint

   Use the conversion of cycle time into hours for calculation.

6. 6.

   Determine how many scrapers are needed if one pusher can serve 6 scrapers and each scraper has a cycle time of 8 minutes and a pusher cycle time of 1.5 minutes.

   Hint

   Calculating the balanced number of scrapers to pushers based on cycle times.