Learning Objective:
Recognize the
principles of rolling techniques
and bituminous rolling.
8-66.
When you are performing rolling
operations, the roller should
travel at what speed range?
1.
1 1/2 to 3 mph
2.
3 1/2 to 6 mph
3.
6 1/2 to 9 mph
4.
9 1/2 to 12 mph
8-67.
When rolling a side slope, you
should start the rolling process
at what location?
1.
At the top of the slope
2.
At the middle of the slope
3.
At the bottom of the slope
4.
At a point 5 feet from either
the top or bottom of the slope
8-68.
What is the optimum temperature
range for rolling a hot mix?
1.
100° to 150°
2.
150° to 185°
3.
225° to 285°
4.
300° to 325°
8-69.
What is the purpose of keeping
roller tires and drums moist when
rolling a hot mix?
1.
To help cool down the hot mix
2.
To keep the hot mix from
sticking to the tires and drums
3.
To support the curing of the
hot mix
4.
To clean the tires or drums
of foreign materials
8-71.
During hot mix construction, at
what stage should longitudinal
and edge rolling be performed?
1.
After breakdown rolling
2.
Directly behind the paver
3.
After intermediate rolling
4.
Before finish rolling
8–72.
Breakdown rolling should start at
what location on a hot bituminous
mat?
1.
High side
2.
Center
3.
Low side
4.
Between the low and center
8-73.
Which of the following factors
must be considered when developing
a rolling pattern?
1.
Location of first pass
2.
Sequence of succeeding passes
3.
Overlapping between passes
4.
All of the above
B-74.
Breakdown rolling with a steel-
wheeled roller should be performed
with the drive wheel positioned in
the direction of travel.
1.
True
2.
False
8-75.
Intermediate rolling should be
performed before a hot mix reaches
what minimum temperature?
1.
100°
2.
130°
3.
165°
4.
185°
8–70.
When water is not enough to keep
the hot mix from sticking to roller
tires and drums, you should use a
detergent designed to breakdown
grease or oil.
1.
True
2.
False
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