1244.
When performing singlesurface
treatment operations, you should
ensure aggregates cover the
bituminous material within how
many minutes after spraying?
1
1 minute
2.
10 minutes
3.
30 minutes
4.
60 minutes
12-45.
To compute the amount of aggregate
per square yard required for a
single-surface treatment, you use
what rule of thumb?
1.
10 to 15 pounds per
square yard
2.
15 to 25 pounds per
square yard
3.
25 to 30 pounds per
square yard
4.
30 to 35 pounds per
square yard
1246.
What size of aggregate is used on
the second layer of a multiple-
surface treatment?
1.
1/2 the size of the
previous layer
2.
3/4 the size of the
previous layer
3.
1 1/2 the size of the
previous layer
4.
1 3/4 the size of the
previous layer
Learning Objective:
Recognize
the principles and components
of paving equipment.
12-47.
Of the following disadvantages,
which is associated with the use
of a tailgate spreader?
1.
The truck must be operated
in reverse
2.
A reduction in steering
control of the truck
3.
A reduction in the operational
speed of the truck
4.
All of the above
12-48.
Which of the following components
is NOT part of an asphalt
distributor unit?
1.
Insulated storage and heating
tank
2.
Open-flame heating system
and asphalt pump
3.
Low-pressure air blower
and circulating and spraying
system
4.
Twin-shaft pugmill that
thoroughly mixes the material
12-49.
Asphalt heating operations can be
performed while the distributor
truck is traveling to the jobsite.
1.
True
2.
False
12-50.
When spraying bitumen with a
distributor truck, the application
rate is controlled by the length
of the spray bar, the pump output,
and what other factor?
1.
Amount of material carried
2.
Existing ground material
3.
Forward speed of the
distributor truck
4.
Amount of turns on the
main control valve
12-51.
When operating a distributor
truck, the spray bar should be set
high enough for the road surface
to receive triple coverage.
However, under heavy wind
conditions or depending on the
nozzle spacing, it may be
necessary to lower the spray bar
more to ensure the surface
receives which of the following
coverages?
1.
Single
2.
Double
3.
Triple
4.
Half
12-52.
When heating bitumen in a
distributor truck, you should NOT
use which of the following fuels?
1.
Kerosene
2.
Fuel oil
3.
Diesel
4.
Gasoline
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