alabama,

ALABAMA (AL) DRAINAGE & CULVERT CONTRACTOR PRACTICE EXAM LATEST QUESTIONS
AND CORRECT ANSWERS GRADE A



**1. According to Alabama state regulations, what is the minimum required bond amount
for a Drainage & Culvert contractor?**

A) $5,000

B) $10,000

C) $15,000

D) $20,000



**Answer: B**

**Explanation:** Alabama Code § 34-14-10 requires a minimum $10,000 surety bond for
drainage and culvert contractors licensed by the Alabama Licensing Board for General
Contractors.



**2. Which Alabama state agency regulates stormwater management during construction
activities?**

A) Alabama Department of Environmental Management (ADEM)

B) Alabama Department of Transportation (ALDOT)

C) Alabama Soil and Water Conservation Committee

D) All of the above



**Answer: D**

**Explanation:** All three agencies have regulatory authority over stormwater
management, with ADEM administering the NPDES permit program, ALDOT having road
construction standards, and the Conservation Committee overseeing erosion control.

,**3. What is the minimum required pipe cover for culverts under unpaved roads according
to ALDOT standards?**

A) 6 inches

B) 12 inches

C) 18 inches

D) 24 inches



**Answer: B**

**Explanation:** ALDOT Standard Specifications typically require minimum 12 inches of
cover for culverts under unpaved roads, with 24 inches for paved roads.



**4. According to Alabama regulations, what is the maximum allowable velocity for unlined
drainage ditches in sandy soil?**

A) 1.5 feet per second

B) 2.0 feet per second

C) 2.5 feet per second

D) 3.0 feet per second



**Answer: B**

**Explanation:** Alabama Erosion and Sediment Control Handbook recommends
maximum 2.0 fps for sandy soils to prevent erosion.



**5. Which type of pipe is NOT approved for permanent storm drainage installations in
Alabama?**

A) Corrugated polyethylene

B) Reinforced concrete

C) PVC Schedule 40

,D) Corrugated metal with asphalt coating



**Answer: C**

**Explanation:** PVC Schedule 40 is typically not approved for permanent storm drainage;
SDR 35 or stronger PVC is required for structural reasons.



**6. What is the minimum required slope for drainage pipes according to ALDOT
standards?**

A) 0.3%

B) 0.5%

C) 1.0%

D) 2.0%



**Answer: B**

**Explanation:** ALDOT typically requires minimum 0.5% slope (0.5 feet per 100 feet) for
drainage pipes to ensure self-cleaning velocity.



**7. According to Alabama regulations, what is the maximum depth for trench excavation
without shoring in stable soil?**

A) 4 feet

B) 5 feet

C) 6 feet

D) 8 feet



**Answer: B**

**Explanation:** OSHA and Alabama regulations allow maximum 5-foot depth without
shoring in Type A or B soils under certain conditions.

, **8. Which of the following requires a NPDES permit in Alabama?**

A) All drainage projects over 1 acre

B) Projects disturbing more than 1 acre

C) Only projects near waterways

D) Projects over 5 acres only



**Answer: B**

**Explanation:** ADEM requires NPDES permits for construction activities disturbing 1
acre or more of land.



**9. What is the minimum required thickness for galvanized corrugated metal pipe (CMP)
under roads in Alabama?**

A) 16 ga

B) 14 ga

C) 12 ga

D) 10 ga



**Answer: A**

**Explanation:** ALDOT typically requires minimum 16 ga galvanized CMP for most
applications, with thicker gauges for higher loads or corrosive conditions.



**10. According to Alabama regulations, how often must erosion control measures be
inspected?**

A) Daily

B) Weekly

C) After each rain event