CLP Driver Health, Fatigue, and Drug & Alcohol Rules

Question 1

What is the alcohol concentration at which a CDL driver is considered over the limit while operating a commercial motor vehicle?

Accepted Answer

0.04

Answer

The federal limit for CDL drivers operating a CMV is 0.04 BAC, half the 0.08 limit for non-commercial drivers.

Question 2

A driver with an alcohol concentration of 0.02 or more but below 0.04 must be:

Accepted Answer

Placed out of service for 24 hours

Answer

A driver at 0.02 or more must be removed from safety-sensitive duty for at least 24 hours.

Question 3

How long before duty must a CMV driver avoid using alcohol?

Accepted Answer

4 hours

Answer

Federal rules prohibit a driver from using alcohol within 4 hours before performing safety-sensitive functions.

Question 4

What is the only reliable remedy for driver fatigue?

Accepted Answer

Sleep

Answer

Stimulants and fresh air offer only brief relief. Real sleep is the only cure for fatigue, and drowsiness leads to microsleeps and crashes.

Question 5

A driver is prescribed a medication that may cause drowsiness. What should they do?

Accepted Answer

Ask the doctor whether it is safe to drive a CMV and tell the medical examiner

Answer

Prescription and over-the-counter medicines can impair driving and affect medical certification. Drivers should consult their doctor and report medications at their medical exam.

(CLP) Commercial Learner's Permit Practice Test

(CLP) Commercial Learner's Permit Practice Test

CLP Driver Health, Fatigue, and Drug & Alcohol Rules