PennDOT Commercial Driver's License 2 — Questions and Answers
Question 1: Under Pennsylvania CDL regulations, what is the minimum age to operate a commercial vehicle in interstate commerce?
- 18 years old
- 21 years old (Correct answer)
- 19 years old
- 25 years old
Correct answer: 21 years old
Drivers must be at least 21 years old to operate a CMV in interstate commerce under federal and Pennsylvania law.
Question 2: When performing a pre-trip inspection on air brakes, what is the maximum leakage rate allowed for a single vehicle with the engine off?
- 4 psi per minute
- 3 psi per minute (Correct answer)
- 2 psi per minute
- 1 psi per minute
Correct answer: 3 psi per minute
Air loss should not exceed 3 psi per minute for a single vehicle during a static leakage test.
Question 3: A CDL holder convicted of a second DUI offense involving a CMV faces a disqualification of:
- 1 year
- Permanent disqualification (Correct answer)
- 5 years
- 3 years
Correct answer: Permanent disqualification
A second serious traffic violation conviction including DUI in a CMV results in permanent disqualification from holding a CDL.
Question 4: Which of the following cargo requires a Hazardous Materials endorsement on a Pennsylvania CDL?
- Fresh produce weighing over 10,000 lbs
- Explosives placarded as Class 1 (Correct answer)
- Construction equipment over 26,001 lbs GVWR
- Livestock in enclosed trailers
Correct answer: Explosives placarded as Class 1
Transporting placarded hazardous materials such as Class 1 explosives requires an HazMat endorsement on the CDL.
Question 5: What does the 'T' endorsement on a Pennsylvania CDL authorize a driver to operate?
- Tank vehicles
- Double and triple trailers (Correct answer)
- School buses
- Tandem axle vehicles
Correct answer: Double and triple trailers
The 'T' endorsement authorizes the operation of double and triple trailers on eligible roadways.
Question 6: Under Pennsylvania law, a CDL holder must notify their employer within how many days of a traffic conviction in any vehicle?
- 5 business days
- 30 days (Correct answer)
- 10 days
- 7 days
Correct answer: 30 days
CDL holders are required to notify their employer within 30 days of any traffic conviction in any type of vehicle.
Question 7: Which of the following is a 'serious traffic violation' that can lead to CDL disqualification if two occur within 3 years?
- Failure to use turn signals
- Excessive speeding (15+ mph over the limit) (Correct answer)
- Parking in a no-parking zone
- Failing to yield to a pedestrian
Correct answer: Excessive speeding (15+ mph over the limit)
Speeding 15 mph or more over the posted speed limit in a CMV is classified as a serious traffic violation under federal CDL regulations.
PennDOT Commercial Driver's License 2
Under Pennsylvania CDL regulations, what is the minimum age to operate a commercial vehicle in interstate commerce?