Texas CDL — General Knowledge: Alcohol & Drugs Practice Test

Question 1

As alcohol accumulates in a driver, which of these shows up behind the wheel?

Accepted Answer

Straddling the lane lines and running stop signs — Once enough alcohol has built up, driving falls apart in visible ways: wandering across lane lines, jerky starts, neglecting turn signals and headlights, blowing through stop signs and red lights, and passing badly.

Answer

Signaling earlier than the situation calls for

Answer

Holding a longer following distance than usual

Answer

Shifting gears more smoothly than before

Question 2

Combining alcohol with another drug is especially risky because alcohol:

Accepted Answer

Can make what the other drug does to you much worse — Alcohol can sharpen the effects of other drugs considerably. The safest approach is simply never to put any drug and driving together.

Answer

Cancels out the effect of most medicines

Answer

Flushes the drug out of your body faster

Answer

Stops mattering once the drug has been absorbed

Question 3

Over-the-counter and prescription medicines:

Accepted Answer

Can impair driving, so you must read the labels and warnings — Many legal medicines, such as cold and allergy pills, can cause drowsiness or otherwise impair driving. Read the labels and do not drive if a medicine warns against operating machinery.

Answer

Are always safe to take before driving

Answer

Improve your driving performance

Answer

Affect only drivers of passenger cars

Question 4

In an hour, roughly how much alcohol can the liver dispose of?

Accepted Answer

About a third of an ounce, less than one ordinary drink holds — The liver works through about a third of an ounce each hour, which is less alcohol than one ordinary drink contains. Drink faster than that and the surplus simply piles up in your body.

Answer

Two full drinks

Answer

A whole ounce of alcohol

Answer

As much as was consumed, provided enough coffee is drunk

Question 5

Which group of drinks all deliver the same quantity of alcohol?

Accepted Answer

Five ounces of 12% wine, an ounce and a half of 80 proof liquor, and twelve ounces of 5% beer — Five ounces of wine at twelve percent, a shot of eighty proof liquor measuring an ounce and a half, and twelve ounces of five percent beer each carry an equal amount of alcohol. What the drink is called makes no difference.

Answer

A twelve-ounce beer, a twelve-ounce glass of wine, and a twelve-ounce mixed drink

Answer

Any two beers, which together equal one shot of liquor

Answer

A pint of beer, which equals one full glass of wine

Question 6

A physician prescribes a medicine for a driver. Carrying and using it on duty is permitted when:

Accepted Answer

The doctor has stated it will not interfere with driving safely — A drug handed to a driver by a doctor may be possessed and taken on duty, but only where the doctor has said plainly that it will not interfere with driving safely.

Answer

The bottle is stored in the sleeper berth

Answer

The dose is swallowed before the pre-trip inspection

Answer

The dispatcher approves it in writing

Question 7

Under 'implied consent' laws, by driving a commercial vehicle you have agreed to:

Accepted Answer

Submit to testing for alcohol or drugs when required — Implied consent means that by driving you have already consented to be tested for alcohol or drugs. Refusing a required test brings a disqualification, just like a failed test.

Answer

Never be tested for alcohol or drugs

Answer

Drive with any BAC below 0.08

Answer

Refuse every inspection at a weigh station

Question 8

Three things together decide how high a driver's blood alcohol concentration climbs. They are:

Accepted Answer

The total you drink, the speed you drink it, and your body weight — The total amount you drink, the speed at which you put it down, and your body weight are what set the level. A lighter person reaches the same concentration on less alcohol than a heavier one.

Answer

What you ate, how tall you are, and the temperature of the room

Answer

The proof of the drink, your age, and nothing else

Answer

How much coffee you had and how long you slept

Question 9

What is the only thing that will make an intoxicated person sober enough to drive?

Accepted Answer

Time — Only time lets the body remove alcohol from the blood. Coffee, exercise, and cold showers do not speed up the process or restore driving ability.

Answer

Black coffee

Answer

A cold shower

Answer

Fresh air and exercise

Question 10

As blood alcohol concentration rises, the first things it affects are:

Accepted Answer

Judgment, self-control, and coordination — Alcohol reduces judgment, self-control, and coordination even at low levels, well before a person feels drunk. That makes it especially dangerous for a driver.

Answer

Only the sense of smell

Answer

Nothing until a person is heavily intoxicated

Answer

Only the sense of hearing

Texas CDL — General Knowledge: Alcohol & Drugs practice test

Study questions with answers

1. As alcohol accumulates in a driver, which of these shows up behind the wheel?

2. Combining alcohol with another drug is especially risky because alcohol:

3. Over-the-counter and prescription medicines:

4. In an hour, roughly how much alcohol can the liver dispose of?

5. Which group of drinks all deliver the same quantity of alcohol?

6. A physician prescribes a medicine for a driver. Carrying and using it on duty is permitted when:

7. Under 'implied consent' laws, by driving a commercial vehicle you have agreed to:

8. Three things together decide how high a driver's blood alcohol concentration climbs. They are:

9. What is the only thing that will make an intoxicated person sober enough to drive?

10. As blood alcohol concentration rises, the first things it affects are:

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