LESSON 4
PRACTICE EXERCISE
The following items will test your knowledge of the material covered in this lesson. There is only one correct
answer for each item. When you complete the exercise, check your answers with the answer key that follows. If
you answer any items incorrectly, go back to the part of the lesson that contains the information involved and
study again.
1. A specimen graph can be used instead of a formula to approximate what?
A. A blending ratio.
B. A commingling ratio.
C. A deterioration ratio.
D. A reclamation ratio.
2. On a specimen graph, where should the percentage of on-specification stock be located?
A. Along the right side.
B. Along the left side.
C. Across the bottom.
D. Across the top.
3. Lines drawn on a specimen graph represent which of the following?
A. Percentage of off-specification stock.
B. Percentage of on-specification stock.
C. Required gum content.
D. Approximate percentage of blend of stocks.
4. Which of the following techniques can bring the characteristics of former off-specification products back into
the range of on-specification limits?
A. Commingling.
B. Inclusion of additives.
C. Weathering.
D. Oxidation.
5. When using a specimen graph, the results provide what?
A. Percentage of off-specification and on-specification stock to be used.
B. Required gum content.
C. Tested blending ratio.
D. Only pilot blends.
4-4
QM 5182
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