NC Highway Contractor Prep Study
Guide
Hydrated lime is on occasion delivered to the mixture at a charge of ___ and ___ percentage by
way of weight of aggregate.
1-2%
Hydrated lime may be introduced in one in all one-of-a-kind bureaucracy which are:
Dry powder or as a slurry
If a slurry is used, it's miles typically proportioned as:
1 component hydrated lime to three components water
Ideally, each cold bin waft fee ought to be checked at charges approximately:
20%, 50%, and eighty% operational glide fee
The fabric in asphalt plant storage tanks normally are saved at temperatures of:
three hundred to 350 degrees
The moisture content of combination exiting the dryer have to be much less than ____ and
ideally much less than ____.
0.Five%, preferably less than zero.2%
Desired discharge temperature of the dryer is:
290 degrees and 325 degrees
A fabric switch automobile (MTV) can keep as much as ____ tons of fabric.
35
What remains in contact with the asphalt unload vans while paving?
Push rollers
, For a paver now not equipped with automated screed controls, there is generally a ____ ratio
between the movement of the tow factors and the angle of the screed.
1:eight
When putting a paving operation on maintain till the subsequent truck arrives:
Leave the hopper as complete as possible
The most green way to compact a longitudinal joint is to overlap the curler ____ inches onto the
cold mat.
6
A predominant motive of ripples or waves is a:
Fluctuating head of fabric in front of the paver screeds.
What is an have an effect on of a volatile HMA blend?
Shoving and rutting
What type of asphalt curler can accomplish all 3 rolling steps?
Smooth drum vibratory steel wheel rollers
What are the three rolling steps in asphalt paving?
Breakdown, intermediate and finish rolling
What is the fine manner to increase the energy per blow with a drop hammer?
Increase hammer weight and decrease drop top.
What size hammer is usually recommended for a 50-foot concrete pile weighing 400 kilos per
linear foot driven via compacted sand for full intensity penetration?
30,000 kilos in step with blow
Why is hydrated lime introduced to a warm asphalt mix?
Reduce the incidence of moisture damage in the blend.
Guide
Hydrated lime is on occasion delivered to the mixture at a charge of ___ and ___ percentage by
way of weight of aggregate.
1-2%
Hydrated lime may be introduced in one in all one-of-a-kind bureaucracy which are:
Dry powder or as a slurry
If a slurry is used, it's miles typically proportioned as:
1 component hydrated lime to three components water
Ideally, each cold bin waft fee ought to be checked at charges approximately:
20%, 50%, and eighty% operational glide fee
The fabric in asphalt plant storage tanks normally are saved at temperatures of:
three hundred to 350 degrees
The moisture content of combination exiting the dryer have to be much less than ____ and
ideally much less than ____.
0.Five%, preferably less than zero.2%
Desired discharge temperature of the dryer is:
290 degrees and 325 degrees
A fabric switch automobile (MTV) can keep as much as ____ tons of fabric.
35
What remains in contact with the asphalt unload vans while paving?
Push rollers
, For a paver now not equipped with automated screed controls, there is generally a ____ ratio
between the movement of the tow factors and the angle of the screed.
1:eight
When putting a paving operation on maintain till the subsequent truck arrives:
Leave the hopper as complete as possible
The most green way to compact a longitudinal joint is to overlap the curler ____ inches onto the
cold mat.
6
A predominant motive of ripples or waves is a:
Fluctuating head of fabric in front of the paver screeds.
What is an have an effect on of a volatile HMA blend?
Shoving and rutting
What type of asphalt curler can accomplish all 3 rolling steps?
Smooth drum vibratory steel wheel rollers
What are the three rolling steps in asphalt paving?
Breakdown, intermediate and finish rolling
What is the fine manner to increase the energy per blow with a drop hammer?
Increase hammer weight and decrease drop top.
What size hammer is usually recommended for a 50-foot concrete pile weighing 400 kilos per
linear foot driven via compacted sand for full intensity penetration?
30,000 kilos in step with blow
Why is hydrated lime introduced to a warm asphalt mix?
Reduce the incidence of moisture damage in the blend.
