12-48.
What sieves should you use to
divide the aggregate sample before
performing the sieve analysis to
determine the combined gradation
for the test blend?
1.
Numbers 4, 8, and 80
2.
Numbers 4, 8, 80, and 200
3.
Numbers 8, 80, and 200
4.
Numbers 8, 40, 80, and 200
12-49.
What is the recommended number of
compaction blows on a compaction
sample for a primary road?
1.
50
2.
75
3.
100
4.
200
12-50.
When mixing and compacting an
aggregate bitumen sample, you
compact the sample with a tamper
for what purpose?
1.
To prepare the sample for
a cohesiveness test
2.
To test the sieve analysis
3.
To produce the same density
that will be attained under
normal traffic
4.
To test the moisture retention
12-51.
When you are determining the
density of porous samples, what
method is recommended to prevent
erroneous results due to
absorption?
1.
Super-saturate the material
before obtaining the unit
weight
2.
Coat the sample with wax to
seal all the voids
3.
Oven-dry the sample, weigh
it, and then super-saturate
87
