Arkansas AR-JD Joint & Crack
Sealing Contractor Practice
Exam | Questions, Verified
Answers & Detailed
Rationales | Complete
Contractor License Exam Prep
Study Guide | Updated 2026
1. What is the primary purpose of sealing a pavement
crack?
A. To increase pavement thickness
B. To make the pavement more decorative
C. To prevent water and incompressible materials from
entering the crack
D. To eliminate the need for pavement maintenance
Correct Answer: Prevent water and incompressible
materials from entering the crack
Rationale: Crack sealing limits the entry of water and
debris, helping reduce moisture-related deterioration
and preventing incompressible materials from
interfering with pavement movement.
2. Which type of pavement distress is most directly
addressed by joint sealing?
A. Rutting
B. Open joints between pavement slabs
C. Aggregate segregation
D. Subgrade pumping only
Correct Answer: Open joints between pavement slabs
,Rationale: Joint sealing is intended to seal designed or
existing joints so water and foreign material do not
enter the joint reservoir and damage the pavement
system.
3. Why must a crack be cleaned before sealant is
installed?
A. Cleaning makes the crack wider
B. Cleaning changes asphalt to concrete
C. Contaminants can prevent the sealant from bonding
to the pavement
D. Cleaning eliminates thermal movement
Correct Answer: Contaminants can prevent the sealant
from bonding to the pavement
Rationale: Dust, dirt, vegetation, moisture, and other
contaminants can interfere with adhesion and reduce
sealant performance.
4. Which equipment is commonly used to remove loose
material from a crack?
A. Concrete vibrator
B. Compressed-air lance
C. Welding torch
D. Concrete finishing machine
Correct Answer: Compressed-air lance
Rationale: Compressed air is commonly used to blow
dust, loose aggregate, and other debris from prepared
cracks before sealing.
5. What is a major concern when using compressed air
for crack cleaning?
,A. Making asphalt too cold
B. Increasing pavement thickness
C. Blowing debris into traffic areas or onto workers
D. Reducing the width of the roadway
Correct Answer: Blowing debris into traffic areas or onto
workers
Rationale: High-pressure air can propel dust and debris.
Proper traffic control, worker protection, and eye
protection are therefore important.
6. What is the purpose of routing a pavement crack?
A. To remove the entire pavement section
B. To create a clean, uniform reservoir for sealant
C. To reduce pavement strength
D. To eliminate thermal expansion
Correct Answer: To create a clean, uniform reservoir for
sealant
Rationale: Routing can create a more consistent
geometry and remove weak or contaminated material so
the sealant can perform properly.
7. A routed crack should generally be sealed only after
the reservoir is:
A. Filled with water
B. Covered with dirt
C. Clean and properly prepared
D. Painted
Correct Answer: Clean and properly prepared
Rationale: Sealant performance depends heavily on
proper preparation. A contaminated or improperly
prepared reservoir can result in premature failure.
, 8. What is the principal function of a backer rod in a
joint or crack-sealing application?
A. Increase pavement thickness
B. Reinforce the asphalt base
C. Control sealant depth and create the proper joint
geometry
D. Absorb all water from the pavement
Correct Answer: Control sealant depth and create the
proper joint geometry
Rationale: A backer rod can control sealant depth,
prevent excessive sealant use, and help establish the
desired two-sided adhesion configuration where
specified.
9. Why should a backer rod generally not be punctured
during installation?
A. It makes concrete stronger
B. It causes pavement expansion
C. Puncturing can create an improper sealant
configuration and allow sealant to contact unintended
surfaces
D. It makes the pavement darker
Correct Answer: Puncturing can create an improper
sealant configuration and allow sealant to contact
unintended surfaces
Rationale: Backer-rod damage can affect sealant
geometry and performance. The manufacturer's
installation requirements should be followed.
10. What is adhesion in a joint-sealing application?
A. The ability of pavement to carry traffic
B. The ability of sealant to bond to the pavement
surface
Sealing Contractor Practice
Exam | Questions, Verified
Answers & Detailed
Rationales | Complete
Contractor License Exam Prep
Study Guide | Updated 2026
1. What is the primary purpose of sealing a pavement
crack?
A. To increase pavement thickness
B. To make the pavement more decorative
C. To prevent water and incompressible materials from
entering the crack
D. To eliminate the need for pavement maintenance
Correct Answer: Prevent water and incompressible
materials from entering the crack
Rationale: Crack sealing limits the entry of water and
debris, helping reduce moisture-related deterioration
and preventing incompressible materials from
interfering with pavement movement.
2. Which type of pavement distress is most directly
addressed by joint sealing?
A. Rutting
B. Open joints between pavement slabs
C. Aggregate segregation
D. Subgrade pumping only
Correct Answer: Open joints between pavement slabs
,Rationale: Joint sealing is intended to seal designed or
existing joints so water and foreign material do not
enter the joint reservoir and damage the pavement
system.
3. Why must a crack be cleaned before sealant is
installed?
A. Cleaning makes the crack wider
B. Cleaning changes asphalt to concrete
C. Contaminants can prevent the sealant from bonding
to the pavement
D. Cleaning eliminates thermal movement
Correct Answer: Contaminants can prevent the sealant
from bonding to the pavement
Rationale: Dust, dirt, vegetation, moisture, and other
contaminants can interfere with adhesion and reduce
sealant performance.
4. Which equipment is commonly used to remove loose
material from a crack?
A. Concrete vibrator
B. Compressed-air lance
C. Welding torch
D. Concrete finishing machine
Correct Answer: Compressed-air lance
Rationale: Compressed air is commonly used to blow
dust, loose aggregate, and other debris from prepared
cracks before sealing.
5. What is a major concern when using compressed air
for crack cleaning?
,A. Making asphalt too cold
B. Increasing pavement thickness
C. Blowing debris into traffic areas or onto workers
D. Reducing the width of the roadway
Correct Answer: Blowing debris into traffic areas or onto
workers
Rationale: High-pressure air can propel dust and debris.
Proper traffic control, worker protection, and eye
protection are therefore important.
6. What is the purpose of routing a pavement crack?
A. To remove the entire pavement section
B. To create a clean, uniform reservoir for sealant
C. To reduce pavement strength
D. To eliminate thermal expansion
Correct Answer: To create a clean, uniform reservoir for
sealant
Rationale: Routing can create a more consistent
geometry and remove weak or contaminated material so
the sealant can perform properly.
7. A routed crack should generally be sealed only after
the reservoir is:
A. Filled with water
B. Covered with dirt
C. Clean and properly prepared
D. Painted
Correct Answer: Clean and properly prepared
Rationale: Sealant performance depends heavily on
proper preparation. A contaminated or improperly
prepared reservoir can result in premature failure.
, 8. What is the principal function of a backer rod in a
joint or crack-sealing application?
A. Increase pavement thickness
B. Reinforce the asphalt base
C. Control sealant depth and create the proper joint
geometry
D. Absorb all water from the pavement
Correct Answer: Control sealant depth and create the
proper joint geometry
Rationale: A backer rod can control sealant depth,
prevent excessive sealant use, and help establish the
desired two-sided adhesion configuration where
specified.
9. Why should a backer rod generally not be punctured
during installation?
A. It makes concrete stronger
B. It causes pavement expansion
C. Puncturing can create an improper sealant
configuration and allow sealant to contact unintended
surfaces
D. It makes the pavement darker
Correct Answer: Puncturing can create an improper
sealant configuration and allow sealant to contact
unintended surfaces
Rationale: Backer-rod damage can affect sealant
geometry and performance. The manufacturer's
installation requirements should be followed.
10. What is adhesion in a joint-sealing application?
A. The ability of pavement to carry traffic
B. The ability of sealant to bond to the pavement
surface
