1. What is the minimum temperature requirement for laying hot mix asphalt
(HMA)?
250°F
Hot mix asphalt must be placed at a minimum of 250°F to ensure proper
compaction and bonding.
2. Which Florida agency regulates asphalt contractor licensing?
Florida Department of Business and Professional Regulation (DBPR)
The DBPR oversees all contractor licensing in Florida, including asphalt
contractors.
3. What type of bond is typically required for asphalt contractors bidding on
public projects?
Performance bond
A performance bond ensures the contractor will complete the project as
specified.
4. What is the main purpose of a tack coat in asphalt paving?
To bond new asphalt to existing pavement
Tack coat creates adhesion between layers of asphalt, preventing
delamination.
5. What is the maximum air void percentage allowed in properly compacted
asphalt pavement?
8%
, Air voids above 8% can lead to moisture infiltration and premature
pavement failure.
6. What is the typical Florida contractor exam passing score?
70%
Florida licensing exams generally require a minimum score of 70% to pass.
7. What test is used to measure asphalt’s resistance to rutting and cracking?
Superpave tests
Superpave testing evaluates asphalt performance under varying
temperatures and loads.
8. What is the function of the base course in asphalt pavement construction?
To provide structural support
The base distributes loads and provides stability for the asphalt surface.
9. What is the minimum liability insurance required for Florida asphalt
contractors?
$300,000 general liability
Florida requires contractors to carry liability coverage to protect against
claims.
10.What is the role of a prime coat in asphalt construction?
To bind the base to the asphalt surface
Prime coat penetrates and strengthens the base while bonding it to the
asphalt layer.
11.Which type of roller is commonly used for asphalt compaction?
Steel drum roller
, Steel drum rollers provide smooth, even compaction essential for asphalt
pavement.
12.What is the ideal moisture content of the base material before asphalt
placement?
Optimum moisture content
Base should be at optimum moisture to ensure compaction without
instability.
13.Which asphalt mixture is designed for high-traffic roads?
Dense-graded hot mix asphalt
Dense-graded mixes are durable and resist rutting, making them suitable
for highways.
14.Which document outlines technical specifications for Florida asphalt
projects?
FDOT Standard Specifications for Road and Bridge Construction
FDOT provides detailed construction standards for asphalt paving.
15.What is the minimum compaction percentage required for asphalt
pavement?
92%
Compaction of at least 92% of theoretical maximum density ensures
durability.
16.What is a common cause of asphalt pavement raveling?
Poor compaction
Inadequate compaction allows aggregate particles to dislodge over time.
, 17.Which asphalt layer provides the wearing surface?
Surface course
The surface course resists traffic wear and provides skid resistance.
18.What is the purpose of asphalt rejuvenators?
To restore aged asphalt flexibility
Rejuvenators soften oxidized asphalt, extending pavement life.
19.What is the maximum lift thickness for asphalt placement in a single pass?
3 inches
FDOT guidelines generally limit lift thickness to 3 inches for proper
compaction.
20.What is the Florida Building Code’s relevance to asphalt contractors?
It regulates site preparation and drainage
While asphalt isn’t a structural component, sitework must comply with
building codes.
21.Which type of asphalt mix is commonly used for parking lots?
Open-graded asphalt mix
Open-graded mixes improve drainage and reduce water pooling in
parking lots.
22.Which test measures asphalt binder viscosity?
Brookfield rotational viscometer
This test ensures the binder has the proper flow characteristics at
application temperature.