12–69.
On a vibrating type of screed, the
compactive force can be generated
by hydraulic motors, rotating
shafts with eccentric weights, or
by electric vibrators.
1.
True
2.
False
12-70.
When an adjustment is made to the
screed control of a paver, the
effect of the adjustment can be
seen after the paver travels what
distance?
1.
Several yards
2.
Several inches
3.
Several feet
4.
Several meters
12-71.
Poor pavement smoothness is most
likely a result of which of the
following operator errors?
1.
Paving too fast
2.
Over thickness control
3.
Paving too slow
4.
Overcompaction
12-72.
The screed plates on an asphalt
paver have a total of how many
screed crown adjustments?
1.
One
2.
Two
3.
Three
4.
Four
12–73.
For paving operations, a paver
screed should be heated at what
time ?
1.
During the paving operation
2.
Before the paving operation
3.
Only sometimes during the
paving operations
4.
Only when asphalt materials
are under the screed
12–74.
Which of the following components
are commonly used screed accessory
attachments?
1.
Screed extensions
2.
Cutoff shoes
3.
Bevel end plates
4.
All of the above
12-75.
The required tonnage of hot-mix
asphalt for a project is 1500
tons.
The screed of the paver is
set at 8 feet, and the depth of
asphalt is 4 inches.
What is the
amount of asphalt that can be laid
per hour?
1.
80.46 tons
2.
100.62 tons
3.
128.35 tons
4.
192.72 tons
96
