Alabama (AL) Drainage & Culvert Contractor Practice Exam LATEST QUESTIONS AND
CORRECT ANSWERS GRADE A
1. **Which Alabama agency licenses drainage and culvert contractors?**
A) Alabama Department of Transportation
B) Alabama Licensing Board for General Contractors
C) Alabama Department of Environmental Management
D) Alabama Soil and Water Conservation Committee
**ANSWER:** B
**EXPLANATION:** The Alabama Licensing Board for General Contractors issues licenses
for drainage and culvert work under specialty classification.
2. **What is the minimum bond requirement for an Alabama drainage contractor
license?**
A) $10,000
B) $15,000
C) $20,000
D) $25,000
**ANSWER:** B
**EXPLANATION:** Alabama requires a $15,000 surety bond for drainage contractors.
3. **The maximum pipe diameter typically allowed for a drainage contractor license is:**
A) 12 inches
B) 24 inches
C) 36 inches
D) No diameter limit
,**ANSWER:** D
**EXPLANATION:** Alabama drainage licenses typically have no diameter limitation.
4. **Which agency regulates stormwater discharge in Alabama?**
A) ADEM (Alabama Department of Environmental Management)
B) EPA Region 4
C) US Army Corps of Engineers
D) All of the above
**ANSWER:** D
**EXPLANATION:** All agencies regulate aspects of stormwater discharge.
5. **The minimum slope for a 12-inch concrete pipe is:**
A) 0.10%
B) 0.25%
C) 0.40%
D) 0.50%
**ANSWER:** C
**EXPLANATION:** Minimum slope is 0.40% for 12-inch pipe (0.40 feet per 100 feet).
6. **What is the required minimum cover over a culvert pipe?**
A) 6 inches
B) 12 inches
C) 18 inches
D) 24 inches
**ANSWER:** B
**EXPLANATION:** Minimum 12 inches of cover for most culvert installations.
,7. **The maximum spacing for culvert joints is:**
A) 4 feet
B) 8 feet
C) 10 feet
D) 12 feet
**ANSWER:** C
**EXPLANATION:** Maximum 10-foot spacing for culvert joints.
8. **Which type of pipe is most resistant to corrosion?**
A) Corrugated metal
B) Concrete
C) PVC
D) HDPE
**ANSWER:** D
**EXPLANATION:** HDPE is highly resistant to corrosion.
9. **The minimum thickness for galvanizing on corrugated metal pipe is:**
A) G-60
B) G-90
C) G-115
D) G-140
**ANSWER:** B
**EXPLANATION:** Minimum G-90 galvanizing for corrugated metal pipe.
10. **What is the purpose of a headwall?**
, A) Prevent erosion at inlet/outlet
B) Support pipe ends
C) Improve hydraulics
D) All of the above
**ANSWER:** D
**EXPLANATION:** Headwalls serve multiple functions including erosion control and
structural support.
11. **The maximum velocity in a concrete pipe should not exceed:**
A) 5 fps
B) 10 fps
C) 15 fps
D) 20 fps
**ANSWER:** C
**EXPLANATION:** Maximum 15 feet per second to prevent erosion.
12. **Which factor most affects culvert sizing?**
A) Pipe material
B) Drainage area
C: Installation depth
D) Contractor preference
**ANSWER:** B
**EXPLANATION:** Drainage area and rainfall intensity determine required capacity.
13. **The minimum embedment for pipe bedding is:**
A) 4 inches
CORRECT ANSWERS GRADE A
1. **Which Alabama agency licenses drainage and culvert contractors?**
A) Alabama Department of Transportation
B) Alabama Licensing Board for General Contractors
C) Alabama Department of Environmental Management
D) Alabama Soil and Water Conservation Committee
**ANSWER:** B
**EXPLANATION:** The Alabama Licensing Board for General Contractors issues licenses
for drainage and culvert work under specialty classification.
2. **What is the minimum bond requirement for an Alabama drainage contractor
license?**
A) $10,000
B) $15,000
C) $20,000
D) $25,000
**ANSWER:** B
**EXPLANATION:** Alabama requires a $15,000 surety bond for drainage contractors.
3. **The maximum pipe diameter typically allowed for a drainage contractor license is:**
A) 12 inches
B) 24 inches
C) 36 inches
D) No diameter limit
,**ANSWER:** D
**EXPLANATION:** Alabama drainage licenses typically have no diameter limitation.
4. **Which agency regulates stormwater discharge in Alabama?**
A) ADEM (Alabama Department of Environmental Management)
B) EPA Region 4
C) US Army Corps of Engineers
D) All of the above
**ANSWER:** D
**EXPLANATION:** All agencies regulate aspects of stormwater discharge.
5. **The minimum slope for a 12-inch concrete pipe is:**
A) 0.10%
B) 0.25%
C) 0.40%
D) 0.50%
**ANSWER:** C
**EXPLANATION:** Minimum slope is 0.40% for 12-inch pipe (0.40 feet per 100 feet).
6. **What is the required minimum cover over a culvert pipe?**
A) 6 inches
B) 12 inches
C) 18 inches
D) 24 inches
**ANSWER:** B
**EXPLANATION:** Minimum 12 inches of cover for most culvert installations.
,7. **The maximum spacing for culvert joints is:**
A) 4 feet
B) 8 feet
C) 10 feet
D) 12 feet
**ANSWER:** C
**EXPLANATION:** Maximum 10-foot spacing for culvert joints.
8. **Which type of pipe is most resistant to corrosion?**
A) Corrugated metal
B) Concrete
C) PVC
D) HDPE
**ANSWER:** D
**EXPLANATION:** HDPE is highly resistant to corrosion.
9. **The minimum thickness for galvanizing on corrugated metal pipe is:**
A) G-60
B) G-90
C) G-115
D) G-140
**ANSWER:** B
**EXPLANATION:** Minimum G-90 galvanizing for corrugated metal pipe.
10. **What is the purpose of a headwall?**
, A) Prevent erosion at inlet/outlet
B) Support pipe ends
C) Improve hydraulics
D) All of the above
**ANSWER:** D
**EXPLANATION:** Headwalls serve multiple functions including erosion control and
structural support.
11. **The maximum velocity in a concrete pipe should not exceed:**
A) 5 fps
B) 10 fps
C) 15 fps
D) 20 fps
**ANSWER:** C
**EXPLANATION:** Maximum 15 feet per second to prevent erosion.
12. **Which factor most affects culvert sizing?**
A) Pipe material
B) Drainage area
C: Installation depth
D) Contractor preference
**ANSWER:** B
**EXPLANATION:** Drainage area and rainfall intensity determine required capacity.
13. **The minimum embedment for pipe bedding is:**
A) 4 inches
