3. Estimating Hourly Cost of Fuel

Try these first

1. 1.

   What is the fuel consumption rate for a gasoline engine in gallons per horsepower hour?

   Hint

   Recall the standard value for gasoline engines.

2. 2.

   Define what an operating factor is in relation to fuel estimation.

   Hint

   It's related to the efficiency of the machine's operation.

3. 3.

   What is the fuel consumption rate for diesel engines?

   • 0.04 gallons per horsepower hour
   • 0.06 gallons per horsepower hour
   • 0.02 gallons per horsepower hour

   Hint

   Remember the specific rates discussed.

4. 4.

   True or False: Fuel consumption rates should always remain constant, regardless of project conditions.

   • True
   • False

   Hint

   Consider why adjustments are necessary.

5. 5.

   A project requires a twin-engine scraper operating at 450 horsepower, but it often faces unfavorable conditions that increase fuel consumption. If the fuel consumption factor rises to 0.15 liters per horsepower hour, calculate the new hourly fuel cost at Rs 70 per liter.

   Hint

   Don’t forget to multiply the new consumption factor by horsepower and then the local price.

6. 6.

   Consider two projects with different site conditions: one is extremely dirty leading to higher wear on equipment. If the operating factor is 0.5 for the clean site and 0.3 for the dirty site, write a brief about how this impacts overall fuel consumption costs.

   Hint

   Think about how site conditions affect operational efficiency.