PennDOT Commercial Driver's License 2

Question 1

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

Accepted Answer

21 years old

Answer

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?

Accepted Answer

3 psi per minute

Answer

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:

Accepted Answer

Permanent disqualification

Answer

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?

Accepted Answer

Explosives placarded as Class 1

Answer

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?

Accepted Answer

Double and triple trailers

Answer

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

(PennDOT) Pennsylvania Department of Transportation Practice Test