2.1. Overview of Previous Lecture

Try these first

1. 1.

   What is a scraper?

   Hint

   Think about the equipment used for earth moving.

2. 2.

   Define swell factor.

   Hint

   It’s essential for volume calculations.

3. 3.

   What is the primary function of a scraper?

   • To dig
   • To transport material
   • To compact soil

   Hint

   Think about what it does after loading.

4. 4.

   True or False: The swell factor decreases when using a pusher.

   • True
   • False

   Hint

   What happens to the material density in the scraper?

5. 5.

   A construction site requires you to calculate the total weight of earth moved. If a scraper has a volume of 24.5 loose cubic meters and a swell factor of 0.85, what is the bank volume and the total weight if the unit weight is 1650 kg/m³?

   Hint

   Remember to calculate both volume and then weight.

6. 6.

   Assuming a pusher cycle time of 1.5 minutes, what would be the optimal number of scrapers to balance productivity if each operates in a cycle of 8.2 minutes?

   Hint

   Think about how to handle rounding when you get a fraction.