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FDOT (Florida Department of Transportation) Asphalt
Plant Level 1 Exam | Latest Verified Questions and
Detailed Answers
OVERVIEW DESCRIPTION:
This comprehensive set of multiple choice questions is designed for the FDOT Asphalt Plant
Level 1 Exam, a CTQP-administered, open-book written test required for technicians, lab
personnel, and contractors. The exam assesses your ability to correctly sample hot mix
asphalt, aggregates, and asphalt binder; perform essential quality control tests such as
maximum specific gravity (Gmm), bulk specific gravity (Gmb), ignition oven asphalt
content, and gyratory compaction; and interpret FDOT specifications covering material
sampling procedures, temperature monitoring and tolerances, and acceptance testing
requirements.
QUESTION 1
When sampling hot mix asphalt from a delivery truck for quality control testing, how
many increments must be obtained to form a representative composite sample?
A. 1
B. 2
C. 3
D. 4
CORRECT ANSWER: C
EXPERT RATIONALE: FDOT requires sampling from at least three points across the width
of the truck bed to capture variability and ensure a representative sample.
QUESTION 2
Which sampling device is specifically designed to collect a cross-section of material from
a truck load of hot mix asphalt?
A. Sample splitter
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B. Quartering canvas
C. Tubular sampling thief
D. Quadrant sampling tray
CORRECT ANSWER: D
EXPERT RATIONALE: A quadrant sampling tray is inserted into the truck load to obtain a
full cross-section sample, reducing segregation bias.
QUESTION 3
When sampling aggregate from a conical stockpile, from which locations should
increments be taken?
A. Top only
B. Bottom only
C. Top, middle, and bottom of the exposed face
D. Random surface grabs
CORRECT ANSWER: C
EXPERT RATIONALE: Combining top, middle, and bottom increments minimizes the
effects of segregation and produces a representative stockpile sample.
QUESTION 4
What is the minimum mass for a dry aggregate field sample intended for sieve analysis
of a ½-inch nominal maximum size aggregate?
A. 10 lb (5 kg)
B. 25 lb (11 kg)
C. 50 lb (23 kg)
D. 75 lb (34 kg)
CORRECT ANSWER: B
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EXPERT RATIONALE: FDOT CTQP follows AASHTO T 27, which requires approximately 25
lb (11 kg) for ½-inch NMS aggregate to ensure a representative gradation.
QUESTION 5
A technician needs to sample aggregate from a stopped conveyor belt. Which
procedure is correct?
A. Shovel off the top layer while the belt is stationary
B. Stop the belt and collect all material from a full belt-width segment
C. Sample from the discharge chute during operation
D. Scrape the belt surface with a hand scoop
CORRECT ANSWER: B
EXPERT RATIONALE: Removing a full cross-section of the entire material stream from a
stopped belt yields the most representative sample.
QUESTION 6
What is the required container for obtaining an asphalt binder sample at the plant?
A. Open-top plastic bucket
B. Clean, dry, wide-mouth quart can with friction lid
C. Glass beaker with foil cover
D. Metal pan with loose cover
CORRECT ANSWER: B
EXPERT RATIONALE: A clean, dry, wide-mouth metal quart can prevents contamination
and allows safe filling with hot binder.
QUESTION 7
When sampling asphalt binder from a storage tank, the sample should be drawn from
the:
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A. Tank bottom drain only
B. Surface through the top hatch
C. Top, middle, and bottom via sampling cocks or a weighted sampler
D. Recirculation line while the pump is off
CORRECT ANSWER: C
EXPERT RATIONALE: Sampling at multiple levels ensures the sample represents the
entire tank, avoiding segregation or stratification effects.
QUESTION 8
The minimum sample mass for a Maximum Specific Gravity (Gmm) test after removing
oversized particles must be within which range?
A. 1000–1200 g
B. 1500–1800 g
C. 2000–2200 g
D. 2500–3000 g
CORRECT ANSWER: C
EXPERT RATIONALE: CTQP requires 2000–2200 g to provide a sufficient sample size for
accurate maximum specific gravity determination.
QUESTION 9
During Gmm sample preparation, material retained on which sieve is considered
oversized and must be removed?
A. No. 4 (4.75 mm)
B. ¼ inch (6.3 mm)
C. ⅜ inch (9.5 mm)
D. ½ inch (12.5 mm)
CORRECT ANSWER: B
FDOT (Florida Department of Transportation) Asphalt
Plant Level 1 Exam | Latest Verified Questions and
Detailed Answers
OVERVIEW DESCRIPTION:
This comprehensive set of multiple choice questions is designed for the FDOT Asphalt Plant
Level 1 Exam, a CTQP-administered, open-book written test required for technicians, lab
personnel, and contractors. The exam assesses your ability to correctly sample hot mix
asphalt, aggregates, and asphalt binder; perform essential quality control tests such as
maximum specific gravity (Gmm), bulk specific gravity (Gmb), ignition oven asphalt
content, and gyratory compaction; and interpret FDOT specifications covering material
sampling procedures, temperature monitoring and tolerances, and acceptance testing
requirements.
QUESTION 1
When sampling hot mix asphalt from a delivery truck for quality control testing, how
many increments must be obtained to form a representative composite sample?
A. 1
B. 2
C. 3
D. 4
CORRECT ANSWER: C
EXPERT RATIONALE: FDOT requires sampling from at least three points across the width
of the truck bed to capture variability and ensure a representative sample.
QUESTION 2
Which sampling device is specifically designed to collect a cross-section of material from
a truck load of hot mix asphalt?
A. Sample splitter
,2|Page
B. Quartering canvas
C. Tubular sampling thief
D. Quadrant sampling tray
CORRECT ANSWER: D
EXPERT RATIONALE: A quadrant sampling tray is inserted into the truck load to obtain a
full cross-section sample, reducing segregation bias.
QUESTION 3
When sampling aggregate from a conical stockpile, from which locations should
increments be taken?
A. Top only
B. Bottom only
C. Top, middle, and bottom of the exposed face
D. Random surface grabs
CORRECT ANSWER: C
EXPERT RATIONALE: Combining top, middle, and bottom increments minimizes the
effects of segregation and produces a representative stockpile sample.
QUESTION 4
What is the minimum mass for a dry aggregate field sample intended for sieve analysis
of a ½-inch nominal maximum size aggregate?
A. 10 lb (5 kg)
B. 25 lb (11 kg)
C. 50 lb (23 kg)
D. 75 lb (34 kg)
CORRECT ANSWER: B
,3|Page
EXPERT RATIONALE: FDOT CTQP follows AASHTO T 27, which requires approximately 25
lb (11 kg) for ½-inch NMS aggregate to ensure a representative gradation.
QUESTION 5
A technician needs to sample aggregate from a stopped conveyor belt. Which
procedure is correct?
A. Shovel off the top layer while the belt is stationary
B. Stop the belt and collect all material from a full belt-width segment
C. Sample from the discharge chute during operation
D. Scrape the belt surface with a hand scoop
CORRECT ANSWER: B
EXPERT RATIONALE: Removing a full cross-section of the entire material stream from a
stopped belt yields the most representative sample.
QUESTION 6
What is the required container for obtaining an asphalt binder sample at the plant?
A. Open-top plastic bucket
B. Clean, dry, wide-mouth quart can with friction lid
C. Glass beaker with foil cover
D. Metal pan with loose cover
CORRECT ANSWER: B
EXPERT RATIONALE: A clean, dry, wide-mouth metal quart can prevents contamination
and allows safe filling with hot binder.
QUESTION 7
When sampling asphalt binder from a storage tank, the sample should be drawn from
the:
, 4|Page
A. Tank bottom drain only
B. Surface through the top hatch
C. Top, middle, and bottom via sampling cocks or a weighted sampler
D. Recirculation line while the pump is off
CORRECT ANSWER: C
EXPERT RATIONALE: Sampling at multiple levels ensures the sample represents the
entire tank, avoiding segregation or stratification effects.
QUESTION 8
The minimum sample mass for a Maximum Specific Gravity (Gmm) test after removing
oversized particles must be within which range?
A. 1000–1200 g
B. 1500–1800 g
C. 2000–2200 g
D. 2500–3000 g
CORRECT ANSWER: C
EXPERT RATIONALE: CTQP requires 2000–2200 g to provide a sufficient sample size for
accurate maximum specific gravity determination.
QUESTION 9
During Gmm sample preparation, material retained on which sieve is considered
oversized and must be removed?
A. No. 4 (4.75 mm)
B. ¼ inch (6.3 mm)
C. ⅜ inch (9.5 mm)
D. ½ inch (12.5 mm)
CORRECT ANSWER: B
