CDL Disqualifications and Medical Requirements

Question 1

What is the minimum disqualification period for a first DUI conviction while driving a commercial motor vehicle (non-hazmat)?

Accepted Answer

1 year

Answer

A first conviction for driving a CMV under the influence results in at least a 1-year CDL disqualification. It rises to 3 years if you were transporting hazardous materials requiring placards.

Question 2

At what blood alcohol concentration (BAC) is a CDL holder considered to be driving under the influence while operating a commercial motor vehicle?

Accepted Answer

0.04%

Answer

The federal limit for commercial drivers in a CMV is 0.04%, which is half the 0.08% limit for non-commercial drivers.

Question 3

What is the penalty for a second conviction of driving a CMV under the influence?

Accepted Answer

Lifetime disqualification

Answer

A second conviction for a major offense such as DUI, leaving the scene of an accident, or using a CMV in a felony results in a lifetime CDL disqualification.

Question 4

A driver is convicted of two serious traffic violations (such as speeding 15 mph or more over the limit) within a 3-year period. What is the minimum CDL disqualification?

Accepted Answer

60 days

Answer

Two serious traffic violations within 3 years result in a 60-day disqualification. A third violation within the same period results in a 120-day disqualification.

Question 5

What is the maximum validity period of a standard DOT medical examiner's certificate for a CDL holder?

Accepted Answer

2 years

Answer

A medical examiner's certificate can be valid for up to 24 months. A shorter period may be issued for conditions such as high blood pressure that need monitoring.

CDL Practice Test

CDL Practice Test

CDL Disqualifications and Medical Requirements