AL DMV Commercial Driver's License 2 — Questions and Answers
Question 1: In Alabama, what is the minimum age to obtain a CDL for interstate commerce?
- 18 years old
- 21 years old (Correct answer)
- 25 years old
- 19 years old
Correct answer: 21 years old
Drivers must be at least 21 to operate a commercial vehicle across state lines, though 18-year-olds may drive intrastate.
Question 2: A Class A CDL is required to operate a combination vehicle with a GCWR of 26,001 pounds or more when the towed unit weighs more than how much?
- 5,000 pounds
- 8,000 pounds
- 10,000 pounds (Correct answer)
- 15,000 pounds
Correct answer: 10,000 pounds
Class A applies when the towed unit exceeds 10,000 pounds GVWR and the combination exceeds 26,001 pounds GCWR.
Question 3: When performing a pre-trip inspection, what should tire tread depth be on the front (steering) tires?
- At least 4/32 inch (Correct answer)
- At least 2/32 inch
- At least 1/32 inch
- At least 8/32 inch
Correct answer: At least 4/32 inch
Front steering tires must have at least 4/32-inch tread depth, while other tires need at least 2/32 inch.
Question 4: What is the maximum blood alcohol concentration (BAC) allowed for a CDL holder operating a commercial motor vehicle?
- 0.08%
- 0.05%
- 0.04% (Correct answer)
- 0.02%
Correct answer: 0.04%
CDL holders are held to a stricter 0.04% BAC limit while operating a commercial motor vehicle, half the standard limit.
Question 5: If you are convicted of a first offense of driving a CMV under the influence, how long will your CDL be disqualified?
- 6 months
- 1 year (Correct answer)
- 3 years
- Life
Correct answer: 1 year
A first DUI conviction in a CMV results in a one-year CDL disqualification, or three years if hauling hazardous materials.
Question 6: How far ahead should you look while driving a commercial vehicle at highway speeds?
- 2 to 4 seconds
- 5 to 8 seconds
- 12 to 15 seconds (Correct answer)
- 25 to 30 seconds
Correct answer: 12 to 15 seconds
Looking 12 to 15 seconds ahead, about a quarter mile at highway speed, gives you time to react to hazards.
Question 7: Which endorsement is required to transport hazardous materials requiring placards in Alabama?
- N endorsement
- T endorsement
- H endorsement (Correct answer)
- P endorsement
Correct answer: H endorsement
The H endorsement, which requires a TSA background check and knowledge test, is needed to haul placarded hazardous materials.
AL DMV Commercial Driver's License 2
In Alabama, what is the minimum age to obtain a CDL for interstate commerce?