Lesson I Practice Exercise -Cont.

Lesson 1/Practice Exercise

6.

You use a simple field test to check the hardness of some potential quarry material. You are

unable to scratch the rock's surface with a copper coin, but can scratch it with a knife blade.

According to Moh's scale of hardness, how would you rate this material?___________________

Is this material suitable as an aggregate for general construction? ___________________

7.

You are considering a possible quarry site. A critical factor for this quarry operation is quantity

of material. Estimate the yield from this potential site (expressed in loose cubic yards) from the

following information:

 average depth of face is 24 feet

 usable quarry working area is 110,000 square yards

 about 12 percent of the rock is weathered

8.

One of the potential quarry sites you are considering has the following characteristics:

 the site is undeveloped

 usable material is about 30 feet in depth

 overburden is about 15 feet in depth

Is this a likely quarry site? Why or why not? _________________________________________

____________________________________________________

9.

You must find a quarry site for a construction operation. What three steps will you use to find,

evaluate, and select a site?

____________________________________________

10.

Aerial photographs are very useful for __________________ information. They are used most

reliably, however, when __________________________________.

11.

You have conducted a site reconnaissance survey to find potential quarry sites. How will you

classify these potential sites into priorities for further field reconnaissance?

______________________________________________________________________________

12.

There are a number of site evaluation factors which you must consider. The importance you

place on each of these factors depends upon the particular situation. In a forward, theater of

operations area, you will probably make _________________________ an

important

consideration. A quarry planned for long-term operation in a civilian, residential area will

probably make ______________________________ factors an important consideration.

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