NETTCP HMA Inspector
What special precautions need to be taken when millings are to be used as RAP?
A. Pavement layer needs to be free of dirt, clay, and other foreign materials
B. Layers beneath the HMA being reclaimed should not be disturbed
C. Milling should be stockpiled with respect to dominant nominal size
D. all of the above - CORRECT ANSWER-D. all of the above
Truing and leveling mix used to fill ruts deeper than 6" should be placed in the ruts:
A. In one layer
B. In two layers
C. In more than two layers
D. none of the above - CORRECT ANSWER-C. In more than two layers
If the job ordered 2500 tons of HMA for a 10 hour work day, at what rate would the plant
need to produce mix to steadily supply the job?
A. 250 tons/hour
B. 2510 tons/hour
C. 25 tons/hour
D. 2500 tons/hour - CORRECT ANSWER-A. 250 tons/hour
Haul units should be loaded:
A. middle back front
B.front back middle
C. back middle front
D. Front, middle, back - CORRECT ANSWER-B. front back middle
Which of the following would indicate an overheated HMA mixture?
A. Segregation
B. Presence of mica
C. Bkue smoke
D. Mix appearing stiff in the truck - CORRECT ANSWER-C. blue smoke
How many 20 ton trucks would be needed to supply a job receiving a total of 800 tons of
HMA with a 0.75 hour round trip time, where the work day is 8 hours?
A. 4
B. 6
C. 8
D. 10 - CORRECT ANSWER-A. 4 trucks
Ideally, the paver moves
A. Stop and go
,B. slowly up to paving
C. at a constant rate
D. Only when trucks are available - CORRECT ANSWER-C. at a constant rate
The PG binder grading system takes into account:
A. Geographical location of pavement
B. Traffic Levels
C. Levels of reliability
D. All of the above - CORRECT ANSWER-D. all of above
The laboratory determined equi-viscous temperatures for mixing and compaction:
A. Should be used without regard to field conditions
B. Should be used as a starting point that may require modification based on field
conditions
C. should not be used since it does not represent field conditions.
D. none of the above - CORRECT ANSWER-B. Should be used as a starting point that
may require modification based on field conditions
85-90% of the overall volume of HMA consists of:
A. air
B. aggregate
C. binder
D. absorbed binder - CORRECT ANSWER-B. aggregate
Specific gravity is best described as:
A. the number of times a subsance is more dense that water
B. the inverse of density
C. the density of water at standard temperature and pressure
D. the apparent loss in mass of an object in water due to the buoyancy principle -
CORRECT ANSWER-A. the number of times a subsance is more dense that water
Which of the following has the biggest impact on the overall "strength" of the HMA
mixture?
A. Asphalt binder grade used
B. Surface texture of aggregates
C. Specific gravity of the aggregate
D. Angularity and distribution of particles - CORRECT ANSWER-D. Angularity and
distribution of particles
The superpave mix design system is distinct from the Marshall method because:
A. The compaction of lab specimens is performed by a gyratory compactor
B. Density/voids analysis can be performed at any point during the compaction process
C. The system provides a coherent and systematic method for selection of components
based on specific situation of traffic and climactic conditions
, D. All of the above - CORRECT ANSWER-D. all of the above
The design level of ESALs specified for superpave HMA mixtures is based on
A. Traffic in a 24 hour period
B. The highest anticipated temperature
C. A percentage of the maximum theoretical density
D. 20 year level of traffic - CORRECT ANSWER-D. 20 year level of traffic
Draindown is a term used to describe the separation of the asphalt binder from the
aggregate in which type of mixtures?
A. Dense graded
B. open and gap graded
C. Recycled
D. rubberized - CORRECT ANSWER-B. open and gap graded
A batch plant is different from a drum plant because:
A. The drum is longer and mixes the asphalt with the binder
B. It has a tower that contains hot bins
C. It uses cold feeds
D. It doesnt use a dryer drum - CORRECT ANSWER-B. It has a tower that contains hot
bins
Under a quality assurance specification:
A. the contractor is responsible for QC
B. The agency is responsibile for Acceptance
C. The use of qualified individuals is required
D. All of the above - CORRECT ANSWER-D. all of the above
At higher temperatures, the viscosity of asphalt binder: increases or decreases? -
CORRECT ANSWER-Decreases
The appropriate compaction temperature for HMA is determined using:
A. temperature viscosity chart
B. equi-viscous temperature ranges
C. a rotational viscometer
D. All of the above - CORRECT ANSWER-D. all of the above
An asphalt binder with a PG grade of 64-22 means that
A. Binder meets performance standards at high temperature of 64 degrees F
B. Binder meets performance standards at low temperature of 22 degrees C
C. Binder meets performance standards at 64 minus 22, or 42 degrees
D. None of the above - CORRECT ANSWER-D. None of the above
As an asphalt binder ages, it's viscosity:
Increases or decreases? - CORRECT ANSWER-Increases
What special precautions need to be taken when millings are to be used as RAP?
A. Pavement layer needs to be free of dirt, clay, and other foreign materials
B. Layers beneath the HMA being reclaimed should not be disturbed
C. Milling should be stockpiled with respect to dominant nominal size
D. all of the above - CORRECT ANSWER-D. all of the above
Truing and leveling mix used to fill ruts deeper than 6" should be placed in the ruts:
A. In one layer
B. In two layers
C. In more than two layers
D. none of the above - CORRECT ANSWER-C. In more than two layers
If the job ordered 2500 tons of HMA for a 10 hour work day, at what rate would the plant
need to produce mix to steadily supply the job?
A. 250 tons/hour
B. 2510 tons/hour
C. 25 tons/hour
D. 2500 tons/hour - CORRECT ANSWER-A. 250 tons/hour
Haul units should be loaded:
A. middle back front
B.front back middle
C. back middle front
D. Front, middle, back - CORRECT ANSWER-B. front back middle
Which of the following would indicate an overheated HMA mixture?
A. Segregation
B. Presence of mica
C. Bkue smoke
D. Mix appearing stiff in the truck - CORRECT ANSWER-C. blue smoke
How many 20 ton trucks would be needed to supply a job receiving a total of 800 tons of
HMA with a 0.75 hour round trip time, where the work day is 8 hours?
A. 4
B. 6
C. 8
D. 10 - CORRECT ANSWER-A. 4 trucks
Ideally, the paver moves
A. Stop and go
,B. slowly up to paving
C. at a constant rate
D. Only when trucks are available - CORRECT ANSWER-C. at a constant rate
The PG binder grading system takes into account:
A. Geographical location of pavement
B. Traffic Levels
C. Levels of reliability
D. All of the above - CORRECT ANSWER-D. all of above
The laboratory determined equi-viscous temperatures for mixing and compaction:
A. Should be used without regard to field conditions
B. Should be used as a starting point that may require modification based on field
conditions
C. should not be used since it does not represent field conditions.
D. none of the above - CORRECT ANSWER-B. Should be used as a starting point that
may require modification based on field conditions
85-90% of the overall volume of HMA consists of:
A. air
B. aggregate
C. binder
D. absorbed binder - CORRECT ANSWER-B. aggregate
Specific gravity is best described as:
A. the number of times a subsance is more dense that water
B. the inverse of density
C. the density of water at standard temperature and pressure
D. the apparent loss in mass of an object in water due to the buoyancy principle -
CORRECT ANSWER-A. the number of times a subsance is more dense that water
Which of the following has the biggest impact on the overall "strength" of the HMA
mixture?
A. Asphalt binder grade used
B. Surface texture of aggregates
C. Specific gravity of the aggregate
D. Angularity and distribution of particles - CORRECT ANSWER-D. Angularity and
distribution of particles
The superpave mix design system is distinct from the Marshall method because:
A. The compaction of lab specimens is performed by a gyratory compactor
B. Density/voids analysis can be performed at any point during the compaction process
C. The system provides a coherent and systematic method for selection of components
based on specific situation of traffic and climactic conditions
, D. All of the above - CORRECT ANSWER-D. all of the above
The design level of ESALs specified for superpave HMA mixtures is based on
A. Traffic in a 24 hour period
B. The highest anticipated temperature
C. A percentage of the maximum theoretical density
D. 20 year level of traffic - CORRECT ANSWER-D. 20 year level of traffic
Draindown is a term used to describe the separation of the asphalt binder from the
aggregate in which type of mixtures?
A. Dense graded
B. open and gap graded
C. Recycled
D. rubberized - CORRECT ANSWER-B. open and gap graded
A batch plant is different from a drum plant because:
A. The drum is longer and mixes the asphalt with the binder
B. It has a tower that contains hot bins
C. It uses cold feeds
D. It doesnt use a dryer drum - CORRECT ANSWER-B. It has a tower that contains hot
bins
Under a quality assurance specification:
A. the contractor is responsible for QC
B. The agency is responsibile for Acceptance
C. The use of qualified individuals is required
D. All of the above - CORRECT ANSWER-D. all of the above
At higher temperatures, the viscosity of asphalt binder: increases or decreases? -
CORRECT ANSWER-Decreases
The appropriate compaction temperature for HMA is determined using:
A. temperature viscosity chart
B. equi-viscous temperature ranges
C. a rotational viscometer
D. All of the above - CORRECT ANSWER-D. all of the above
An asphalt binder with a PG grade of 64-22 means that
A. Binder meets performance standards at high temperature of 64 degrees F
B. Binder meets performance standards at low temperature of 22 degrees C
C. Binder meets performance standards at 64 minus 22, or 42 degrees
D. None of the above - CORRECT ANSWER-D. None of the above
As an asphalt binder ages, it's viscosity:
Increases or decreases? - CORRECT ANSWER-Increases
