12-39.
Composition of a bitumen is
determined by which of the
following methods?
1.
Matching a sample of the
bitumen with previously
marked samples
2.
Determining the elasticity
of the sample
3.
Both 1 and 2 above
4.
Heating the sample to analyze
the breakdown of the bitumen
12-40.
Which of the following types of
equipment may be used to determine
the flash point of a sample of
SC-800?
1.
Tag open-cup equipment
2.
Cleveland open-cup equipment
3.
Both 1 and 2 above
4.
Copper water bath apparatus
12-41.
Flash point is defined as the
temperature at which
1.
the surface of the material
ignites without the use of
a test flame
2.
the entire surface of the
material produces a blue flame
3.
the test flame produces a
distinct flash on the surface
4.
the surface of the material
remains ignited without the
use of a test flame
12-42.
The results of the penetration
test should be the average of
1.
no more than three tests whose
values differ by three points
or less between maximum and
minimum
2.
not less than three tests
whose values differ by four
points or less between maximum
and minimum
3.
two tests regardless of the
difference
4.
not less than four tests whose
values differ by three points
or less between maximum and
minimum
12-43.
In addition to grade deter-
mination, the penetration test
can be useful for which of the
following purposes?
1.
Determining the effect of age
and weathering of existing
pavement
2.
Detecting overheating in
existing pavement
3.
Determining the effect of age
on asphalt in storage tanks
4.
Each of the above
12-44.
What minimum percentage of the
mineral filler should normally
pass the No. 200 sieve?
1.
50%
2.
65%
3.
85%
4.
100%
12-45.
It is determined that the original
oven-dried weight of a paving mix
aggregate sample is 532 grams.
After it has been thoroughly
washed and oven-dried, the sample
weighs 474 grams. What is the
percentage of mineral dust in the
sample?
1.
8.2%
2.
10.9%
3.
12.2%
4.
24.4%
12-46.
You are to determine the specific
gravity of an aggregate that has
been retained on the 3/8-inch
sieve. What equipment do you use?
1.
Pycnometer
2.
Cleveland open-cup
3.
Tag open-cup
4.
Dunagan apparatus
12-47.
Mix design tests are used to
determine which of the following
data?
1.
The optimum bitumen content
2.
The optimum aggregate content
3.
The gradation requirement
4.
Each of the above
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