Illinois Hot-Mix Asphalt Level II Technician Practice
Exam Questions And Correct Answers (Verified
Answers) Plus Rationales 2026 Q&A | Instant
Download Pdf
1. What is the primary purpose of performing a daily ignition oven
calibration check during HMA testing?
A. To verify binder grade
B. To ensure oven insulation is intact
C. To check for proper mass loss correction factors
D. To ensure accurate asphalt binder content results
Rationale: Accurate binder content depends on proper oven calibration;
incorrect calibration causes incorrect asphalt percentages.
2. The Illinois DOT requires aggregate gradation testing to be performed at
minimum:
,A. Weekly
B. Daily for each production day
C. Once per project
D. Monthly
Rationale: Daily gradations ensure continuous quality compliance during
HMA production.
3. A mix with too much asphalt binder is likely to:
A. Increase stability
B. Reduce flow
C. Cause rutting and shoving
D. Improve skid resistance
Rationale: Excess binder softens the mix, increasing susceptibility to rutting
under load.
4. The purpose of the Rice (Theoretical Maximum Specific Gravity) test is
to determine:
A. VMA
B. TSR
C. Air voids in compacted mix
D. Fine aggregate angularity
,Rationale: Air voids require both bulk density and theoretical maximum
density, which comes from the Rice test.
5. When running a gradation, the correct sequence of sieving is:
A. Start with the smallest sieve
B. Start with the largest sieve and work downward
C. Random order
D. Start with any sieve
Rationale: Sieving from largest to smallest avoids overloading smaller
sieves and maintains accuracy.
6. The temperature of HMA samples for volumetric testing must be within:
A. 50–100°F
B. 150–170°F
C. Per mix design-specified compaction temperature range
D. Any temperature
Rationale: Each mix has a required compaction temperature based on
binder grade for consistent results.
7. If VMA is lower than specified, what is the most common adjustment?
, A. Add more binder
B. Reduce binder
C. Increase coarse aggregate or reduce fines
D. Increase production temperature
Rationale: VMA measures void space in the aggregate; more coarse
material increases voids.
8. Excessive dust coating on aggregates can cause:
A. Improved strength
B. Better bonding
C. Stripping and moisture damage
D. Lower skid resistance only
Rationale: Dust prevents proper binder–aggregate adhesion, leading to
moisture susceptibility.
9. Voids in Mineral Aggregate (VMA) is defined as the volume of:
A. Binder only
B. Air voids only
C. Air voids + binder space in compacted mix
D. Solids only
Rationale: VMA represents the space between aggregate particles, which
includes binder and air.
Exam Questions And Correct Answers (Verified
Answers) Plus Rationales 2026 Q&A | Instant
Download Pdf
1. What is the primary purpose of performing a daily ignition oven
calibration check during HMA testing?
A. To verify binder grade
B. To ensure oven insulation is intact
C. To check for proper mass loss correction factors
D. To ensure accurate asphalt binder content results
Rationale: Accurate binder content depends on proper oven calibration;
incorrect calibration causes incorrect asphalt percentages.
2. The Illinois DOT requires aggregate gradation testing to be performed at
minimum:
,A. Weekly
B. Daily for each production day
C. Once per project
D. Monthly
Rationale: Daily gradations ensure continuous quality compliance during
HMA production.
3. A mix with too much asphalt binder is likely to:
A. Increase stability
B. Reduce flow
C. Cause rutting and shoving
D. Improve skid resistance
Rationale: Excess binder softens the mix, increasing susceptibility to rutting
under load.
4. The purpose of the Rice (Theoretical Maximum Specific Gravity) test is
to determine:
A. VMA
B. TSR
C. Air voids in compacted mix
D. Fine aggregate angularity
,Rationale: Air voids require both bulk density and theoretical maximum
density, which comes from the Rice test.
5. When running a gradation, the correct sequence of sieving is:
A. Start with the smallest sieve
B. Start with the largest sieve and work downward
C. Random order
D. Start with any sieve
Rationale: Sieving from largest to smallest avoids overloading smaller
sieves and maintains accuracy.
6. The temperature of HMA samples for volumetric testing must be within:
A. 50–100°F
B. 150–170°F
C. Per mix design-specified compaction temperature range
D. Any temperature
Rationale: Each mix has a required compaction temperature based on
binder grade for consistent results.
7. If VMA is lower than specified, what is the most common adjustment?
, A. Add more binder
B. Reduce binder
C. Increase coarse aggregate or reduce fines
D. Increase production temperature
Rationale: VMA measures void space in the aggregate; more coarse
material increases voids.
8. Excessive dust coating on aggregates can cause:
A. Improved strength
B. Better bonding
C. Stripping and moisture damage
D. Lower skid resistance only
Rationale: Dust prevents proper binder–aggregate adhesion, leading to
moisture susceptibility.
9. Voids in Mineral Aggregate (VMA) is defined as the volume of:
A. Binder only
B. Air voids only
C. Air voids + binder space in compacted mix
D. Solids only
Rationale: VMA represents the space between aggregate particles, which
includes binder and air.
