DGT Alcohol, Drugs & Impaired Driving 3

Question 1

What is an ignition interlock device (IID) and when is it commonly required?

Accepted Answer

A breath-test device wired to the ignition that prevents the car from starting if alcohol is detected

Answer

An IID requires the driver to provide a breath sample before the engine will start, and is commonly required after a DUI conviction to allow restricted driving privileges.

Question 2

Combining alcohol with prescription opioids before driving is especially dangerous because:

Accepted Answer

Both depress the central nervous system, multiplying impairment beyond either substance alone

Answer

Alcohol and opioids are both CNS depressants; using them together produces a synergistic effect that can cause extreme sedation, dangerously impairing driving ability.

Question 3

Which organization sets the federal standard BAC limit of 0.04% for commercial motor vehicle drivers?

Accepted Answer

The Federal Motor Carrier Safety Administration (FMCSA)

Answer

FMCSA regulations set the BAC limit at 0.04% for commercial drivers, half the standard limit, recognizing the greater responsibility and risk associated with large vehicles.

Question 4

A driver feels 'fine to drive' after several drinks. Why is this perception dangerous?

Accepted Answer

Alcohol impairs the ability to judge one's own level of impairment

Answer

One of alcohol's primary effects is impairing self-assessment; drinkers routinely overestimate their own sobriety and driving ability, making subjective feelings an unreliable safety guide.

Question 5

Which of the following is NOT a physiological factor that influences how quickly BAC rises after drinking?

Accepted Answer

The color of the alcoholic beverage

Answer

BAC is influenced by body weight, gender (women generally absorb alcohol faster), food consumption, and rate of drinking — the color of a beverage has no physiological effect on absorption.

(DGT) Directorate-General for Traffic Test Practice Test

(DGT) Directorate-General for Traffic Test Practice Test

DGT Alcohol, Drugs & Impaired Driving 3