NETTCP HMA Inspector Exam
Questions with Complete Solutions29
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 - ANSWERS-D. all of the above
At higher temperatures, the viscosity of asphalt binder: increases or decreases? - ANSWERS-
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 - ANSWERS-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 - ANSWERS-D. None of the above
As an asphalt binder ages, it's viscosity:
,Increases or decreases? - ANSWERS-Increases
During which stage in the "life" of an asphalt binder does the most oxidation occur?
A. During storage
B. During mixing, placing, and compacting of HMA
C. 7 years after the pavement is in place
D. During cycles of freezing and thawing. - ANSWERS-B. During mixing, placing, and compacting
of HMA
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 - ANSWERS-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 - ANSWERS-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 - ANSWERS-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 - ANSWERS-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 - ANSWERS-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 - ANSWERS-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 - ANSWERS-D. 20 year level of traffic
Questions with Complete Solutions29
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 - ANSWERS-D. all of the above
At higher temperatures, the viscosity of asphalt binder: increases or decreases? - ANSWERS-
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 - ANSWERS-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 - ANSWERS-D. None of the above
As an asphalt binder ages, it's viscosity:
,Increases or decreases? - ANSWERS-Increases
During which stage in the "life" of an asphalt binder does the most oxidation occur?
A. During storage
B. During mixing, placing, and compacting of HMA
C. 7 years after the pavement is in place
D. During cycles of freezing and thawing. - ANSWERS-B. During mixing, placing, and compacting
of HMA
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 - ANSWERS-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 - ANSWERS-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 - ANSWERS-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 - ANSWERS-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 - ANSWERS-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 - ANSWERS-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 - ANSWERS-D. 20 year level of traffic
