Commercial Driver's License Flashcards

Under Pennsylvania CDL regulations, what is the minimum age to operate a commercial vehicle in interstate commerce?

Answer: 21 years old

Drivers must be at least 21 years old to operate a CMV in interstate commerce under federal and Pennsylvania law.

When performing a pre-trip inspection on air brakes, what is the maximum leakage rate allowed for a single vehicle with the engine off?

Answer: 3 psi per minute

Air loss should not exceed 3 psi per minute for a single vehicle during a static leakage test.

A CDL holder convicted of a second DUI offense involving a CMV faces a disqualification of:

Answer: Permanent disqualification

A second serious traffic violation conviction including DUI in a CMV results in permanent disqualification from holding a CDL.

Which of the following cargo requires a Hazardous Materials endorsement on a Pennsylvania CDL?

Answer: Explosives placarded as Class 1

Transporting placarded hazardous materials such as Class 1 explosives requires an HazMat endorsement on the CDL.

What does the 'T' endorsement on a Pennsylvania CDL authorize a driver to operate?

Answer: Double and triple trailers

The 'T' endorsement authorizes the operation of double and triple trailers on eligible roadways.

Under Pennsylvania law, a CDL holder must notify their employer within how many days of a traffic conviction in any vehicle?

Answer: 30 days

CDL holders are required to notify their employer within 30 days of any traffic conviction in any type of vehicle.

Which of the following is a 'serious traffic violation' that can lead to CDL disqualification if two occur within 3 years?

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.