Question

1. Define equipment operating costs.

2. A contractor is thinking about starting a new line of work that requires a piece of specialty equipment, called a trenching machine. The plan is to try this type of work out for one construction season, and then decide whether or not to stay in the business permanently. What would be the best way to obtain equipment for this type of work? Justify your answer.

3. What causes rolling resistance, and what are some things that a contractor can do to reduce rolling resistance?

4. Define coefficient of traction.

5. Why are cycle times typically larger for a hoe excavator than a front shovel?

6. What are some advantages of crawler bulldozers (give at least 2)?

7. What are advantages to using bottom dump trucks? (give at least 2)?

8. List and define the three types of blade adjustments.

9. Summarize advantages and disadvantages of crawler cranes.

10. What does the word "slew" mean with regard to tower cranes? what are two different ways a tower crane can slew?

11. List dynamic factors that affect crane capacity.

12. (6 pts) List the seven rules for pumping concrete.

13. What are the three rolling steps when paving asphalt?

14. What is TMPH? What is the possible consequence for not considering TMPH?

15. Why are cycle times typically larger for a hoe than a shovel?

16. (4 pts) Define the term of “windrow” in grader operations.

17. How can you minimize spillage from the blade?

18. (3 pts) In what soils is a vibratory pile driver/hammer effective?

19. (7 pts) List major factors that should be considered when laying out a construction site.

List 4 functions that required to process and produce suitable aggregate materials

Answer 1

1) Equipment Operating (Operational) costs are the expenses which are related to the operation of a equipment, or to the operation of a device, component, piece of equipment or facility. They are the cost of resources used by an organization just to maintain its existence. 2) Equipment leasing, or equipment hiring, can be the best way to obtain the equipment as in this method the lease or hire of equipment is made to access and use such equipment aside from the traditional purchasing route as it is made use for particular season as trial, so we can minimize cost of purchasing the equipment. 3) The primary cause of pneumatic tire rolling resistance is hysteresis. Having an appropriate amount of air pressure, designers can reduce rolling resistance through engineering. Engineers reduce resistance by introducing combinations of materials such as natural and synthetic rubber, designing stiffer sidewalls, and reducing tread depth. Each of these green innovations help reduce tire deformation, leading to fuel savings. 4) The coefficient of traction is defined as the usable force for traction divided by the weight on the running gear (wheels, tracks etc.) For remaining queries please post again.