Louisiana: Alcohol and drugs — Part 2 Practice Test
Questions in this part include: “Which body parts metabolize and eliminate alcohol, according to the manual?” · “What does blood alcohol concentration (BAC) of 0.10% mean, in the manual’s example?”
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Questions are original and based on the official manual "Class D & E Driver’s Guide" (Revised August 2025 (DPSMV2052 R08/25)), Louisiana Office of Motor Vehicles.
All 19 questions in this practice test
Take the test above first, then use this list to study. Tap “Show answer” to see the correct answer and explanation.
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Which body parts metabolize and eliminate alcohol, according to the manual?
- The stomach metabolizes it; the skin eliminates it
- The heart metabolizes it; the lungs eliminate it
- The liver metabolizes it; the kidneys and lungs eliminate it
- The brain metabolizes it; the kidneys eliminate it
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Correct answer: The liver metabolizes it; the kidneys and lungs eliminate it
Alcohol is metabolized by the liver and eliminated through the kidneys and lungs, a process that takes time.
Source: Class D & E Driver’s Guide (Revised August 2025 (DPSMV2052 R08/25)), page 122 · Open this page in the manual (Manual page 122)
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How does alcohol affect your ability to judge speeds, distances and angles?
- It reduces that ability
- It improves that ability
- It has no effect on that ability
- It affects it only at night
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Correct answer: It reduces that ability
The manual lists reduced ability to judge speeds, distances and angles as an effect of alcohol.
Source: Class D & E Driver’s Guide (Revised August 2025 (DPSMV2052 R08/25)), page 122 · Open this page in the manual (Manual page 122)
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What does alcohol encourage a driver to do?
- Follow other vehicles at a longer distance
- Take foolish risks and break laws
- Obey speed limits more closely
- Use turn signals more often
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Correct answer: Take foolish risks and break laws
The manual says alcohol encourages the driver to take foolish risks and break laws.
Source: Class D & E Driver’s Guide (Revised August 2025 (DPSMV2052 R08/25)), page 122 · Open this page in the manual (Manual page 122)
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How does alcohol affect a driver’s reaction time in stopping and turning?
- It speeds up reaction time
- It does not change reaction time
- It slows reaction time only when driving fast
- It slows reaction time
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Correct answer: It slows reaction time
Alcohol slows reaction time in stopping and turning.
Source: Class D & E Driver’s Guide (Revised August 2025 (DPSMV2052 R08/25)), page 122 · Open this page in the manual (Manual page 122)
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How does alcohol affect a driver’s vision?
- Eyes become blurred and cannot focus
- Eyes adjust faster to bright light
- Vision improves for objects far ahead
- Eyes can focus better on small details
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Correct answer: Eyes become blurred and cannot focus
The manual says alcohol limits vision; the eyes become blurred and cannot focus.
Source: Class D & E Driver’s Guide (Revised August 2025 (DPSMV2052 R08/25)), page 122 · Open this page in the manual (Manual page 122)
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How does alcohol affect a driver’s feelings toward other drivers?
- It makes the driver more patient with others
- It makes the driver more willing to yield
- It increases anger toward other drivers
- It has no effect on feelings
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Correct answer: It increases anger toward other drivers
Alcohol increases anger towards other drivers.
Source: Class D & E Driver’s Guide (Revised August 2025 (DPSMV2052 R08/25)), page 122 · Open this page in the manual (Manual page 122)
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Which of these is an effect of alcohol on a driver?
- It causes sleepiness
- It keeps the driver awake longer
- It improves concentration
- It improves the ability to judge one’s own condition
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Correct answer: It causes sleepiness
Alcohol causes sleepiness; it also impairs concentration and reduces the ability to judge one’s own condition.
Source: Class D & E Driver’s Guide (Revised August 2025 (DPSMV2052 R08/25)), page 122 · Open this page in the manual (Manual page 122)
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What should you do if you know someone has been drinking?
- Let them drive if they feel fine
- Let them drive if they drive slowly
- Not allow them to drive
- Let them drive only on roads they know
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Correct answer: Not allow them to drive
The manual says if you know someone has been drinking, do not allow them to drive, since even one drink can inhibit response time.
Source: Class D & E Driver’s Guide (Revised August 2025 (DPSMV2052 R08/25)), page 123 · Open this page in the manual (Manual page 123)
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Alcohol can give a feeling of warmth by dilating the capillaries beneath the skin. What is actually happening to the body’s temperature?
- It is being raised
- It is being lowered
- It stays the same
- It rises only in hot weather
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Correct answer: It is being lowered
The feeling of warmth is caused by internal heat moving to the surface, but the body’s temperature is actually being lowered.
Source: Class D & E Driver’s Guide (Revised August 2025 (DPSMV2052 R08/25)), page 123 · Open this page in the manual (Manual page 123)
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What is an alcoholic blackout?
- A sudden loss of vision while driving at night that lasts an hour
- A short nap brought on by drinking only a single alcoholic drink
- A loss of balance that lasts for several minutes after drinking
- Complete memory loss the next morning from information not stored properly
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Correct answer: Complete memory loss the next morning from information not stored properly
A blackout occurs when information is not stored properly in the brain, causing a complete memory loss the next morning.
Source: Class D & E Driver’s Guide (Revised August 2025 (DPSMV2052 R08/25)), page 123 · Open this page in the manual (Manual page 123)
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What does blood alcohol concentration (BAC) of 0.10% mean, in the manual’s example?
- 10 mg of alcohol per 100 ml of blood
- 1,000 mg of alcohol per 100 ml of blood
- 100 mg of alcohol per 10 ml of blood
- 100 mg of alcohol per 100 ml of blood
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Correct answer: 100 mg of alcohol per 100 ml of blood
The manual gives the example that at 0.10% BAC there is 100 mg of alcohol per 100 ml of blood.
Source: Class D & E Driver’s Guide (Revised August 2025 (DPSMV2052 R08/25)), page 123 · Open this page in the manual (Manual page 123)
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For most legal purposes, how can a person’s BAC be measured more simply than with a blood sample?
- By measuring the pulse rate of the person being tested
- By analyzing exhaled breath, as with a breathalyzer
- By checking the skin temperature of the person tested
- By timing how quickly the person reacts to a light
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Correct answer: By analyzing exhaled breath, as with a breathalyzer
The manual says a blood sample is not necessary for most legal purposes because BAC can be measured by analyzing exhaled breath.
Source: Class D & E Driver’s Guide (Revised August 2025 (DPSMV2052 R08/25)), page 123 · Open this page in the manual (Manual page 123)
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According to the manual, how long should someone who has had four normal drinks wait before they drive?
- One hour
- Two hours
- Four hours or more
- Thirty minutes
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Correct answer: Four hours or more
It takes about an hour for the body to get rid of one normal drink, so someone who has had four normal drinks should wait four hours or more.
Source: Class D & E Driver’s Guide (Revised August 2025 (DPSMV2052 R08/25)), page 123 · Open this page in the manual (Manual page 123)
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In Louisiana, what is the legal limit of blood alcohol concentration for a driver 21 years of age or older?
- .08
- .10
- .05
- .12
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Correct answer: .08
The manual states the legal limit is .08 if you are 21 years of age or older.
Source: Class D & E Driver’s Guide (Revised August 2025 (DPSMV2052 R08/25)), page 123 · Open this page in the manual (Manual page 123)
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In Louisiana, what is the legal limit of blood alcohol concentration for a driver 20 years of age or younger?
- .01
- .02
- .05
- .10
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Correct answer: .02
The manual states the legal limit is .02 if you are 20 years of age and younger.
Source: Class D & E Driver’s Guide (Revised August 2025 (DPSMV2052 R08/25)), page 123 · Open this page in the manual (Manual page 123)
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In Louisiana, what is the legal limit of blood alcohol concentration for a driver operating a commercial motor vehicle?
- .01
- .06
- .10
- .04
Show answer
Correct answer: .04
The manual states the legal limit is .04 if you are operating a commercial motor vehicle.
Source: Class D & E Driver’s Guide (Revised August 2025 (DPSMV2052 R08/25)), page 123 · Open this page in the manual (Manual page 123)
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How much alcohol can the body process per hour, according to the manual?
- 0.015%
- 0.15%
- 0.05%
- 0.002%
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Correct answer: 0.015%
The manual says the body can process 0.015% of alcohol per hour.
Source: Class D & E Driver’s Guide (Revised August 2025 (DPSMV2052 R08/25)), page 123 · Open this page in the manual (Manual page 123)
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Which of these has the same alcohol as one 12-oz serving of beer, according to the drink chart?
- Two glasses of wine
- Three shots of whiskey
- One glass of wine
- One 12-oz soft drink
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Correct answer: One glass of wine
The chart shows that one glass of wine equals one shot of whiskey, which equals one 12-oz serving of beer.
Source: Class D & E Driver’s Guide (Revised August 2025 (DPSMV2052 R08/25)), page 123 · Open this page in the manual (Manual page 123)
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In the manual’s words, what does “sober” mean?
- No alcohol or other impairing drugs in the circulatory system
- No more than one drink has been consumed in the last hour
- The driver feels able to walk and talk without trouble
- The BAC is below the legal limit but still above zero
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Correct answer: No alcohol or other impairing drugs in the circulatory system
The manual defines “sober” as no alcohol or other impairing drugs being in the circulatory system.
Source: Class D & E Driver’s Guide (Revised August 2025 (DPSMV2052 R08/25)), page 124 · Open this page in the manual (Manual page 124)