Nunavut Class 7 overview

Nunavut Class 7: Alcohol, drugs and driving

How alcohol affects driving, the 0.08 limit and impairment at any level, the blood-alcohol chart, prescription and over-the-counter drugs, illicit drugs and sobering-up myths.

  • 15 questions
  • Topic drill
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Alcohol, drugs and driving · Question 1Score 0/0

You took a prescribed tranquillizer and then had one small drink. What does the manual warn?

Study reference: Nunavut Driver's Manual (2022 posting), Ch. 9 Alcohol, Drugs and Driving, pp. 59–62

All 15 questions in this test

Every question and its answer choices. The correct answers and explanations appear when you take the test above.

  1. You took a prescribed tranquillizer and then had one small drink. What does the manual warn?

    1. Only the drug affects you
    2. One drink with a drug is safe
    3. The combined effect is even stronger
    4. The drink cancels the drug
  2. Which of these is a typical sign of a driver who has been drinking?

    1. Keeping a steady speed
    2. Stopping fully at stop signs
    3. Signalling every single lane change well in advance
    4. Failing to dim headlights for oncoming traffic
  3. How is alcohol removed from your body?

    1. Mainly by the liver, which takes time
    2. By eating a large meal
    3. By exercising for a few minutes
    4. By drinking lots of water quickly
  4. What is the blood-alcohol chart in the manual used for?

    1. Estimating BAC from body weight and drinks
    2. Listing which drinks are legal
    3. Setting fines for impaired drivers
    4. Showing how fast alcohol leaves
  5. What did tests show about drivers who had used marijuana?

    1. No effect on driving skills
    2. Slower eye-hand coordination, yet more confidence
    3. Faster reactions and more caution behind the wheel
    4. Better focus on curves
  6. According to studies in the manual, in what share of fatal accidents had at least one driver been drinking?

    1. About 5%
    2. About 90%
    3. About 50%
    4. About 20%
  7. You are taking an allergy or cold medicine with an antihistamine. What does the manual advise?

    1. It is safe at any dose
    2. Don't use it when you will be driving
    3. Drive only short distances
    4. Take it with coffee to stay alert
  8. What blood alcohol level does the manual give as the legal limit for driving?

    1. 0.05%
    2. 0.08%
    3. 0.10%
    4. 0.02%
  9. How does the manual describe alcohol's effect on the body?

    1. It has no effect at low levels
    2. It is a depressant that slows reflexes
    3. It is a stimulant that sharpens you
    4. It improves night vision
  10. A friend has had too much to drink and drinks black coffee before driving. What effect does the coffee have?

    1. It makes them safe to drive in an hour
    2. It cuts the alcohol level in half
    3. It may wake them up, but won't sober them
    4. It removes alcohol from the blood
  11. Which abilities does alcohol affect first?

    1. Muscle strength
    2. Hearing and sense of smell
    3. Judgment and self-control
    4. Eyesight in daylight
  12. A driver has just started taking high blood pressure pills. What side effect does the manual warn about?

    1. Faster reflexes
    2. Light-headedness
    3. Better concentration
    4. Sharper vision
  13. Your blood alcohol is below 0.08%, but your driving is clearly affected. Can you be charged with impaired driving?

    1. Yes, at any level if your ability is impaired
    2. No, because you are under the legal 0.08% limit
    3. Only if you are a new driver
    4. Only if you cause a crash
  14. A driver who uses insulin skips a meal. What could happen?

    1. The insulin stops working
    2. Low blood sugar could cause weakness or fainting
    3. Blood pressure rises sharply and causes a headache
    4. Nothing, if the dose was right
  15. In one study, how did the crash rate of amphetamine users compare with non-users?

    1. It was ten times higher
    2. It was the same
    3. It was half as high
    4. It was twice as high

Alcohol, drugs and driving: key rules to remember

Our summary of what the official handbook says on this topic, in our own words. Read it before or after the practice questions above, then check the original chapter. Read the official chapter ↗

Alcohol

  • Alcohol is by far the greatest hazard for drivers.
  • It affects the highest brain functions first: removes inhibitions and impairs judgment; larger amounts affect more basic functions; finally unconsciousness and even death.
  • A drinking driver may: drive too fast or too slow; fail to dim lights; pass improperly; change lanes often; drift in the lane; overshoot or ignore signals; lose alertness in emergencies; take longer to brake.
  • Studies: in 50% of fatal accidents at least one driver had been drinking.
  • Light-to-moderate drinkers feel no physical sign of impairment, may become impatient or angry.

How much can a driver safely drink?

  • The goal is absolute sobriety at the wheel. You don't have to look or feel drunk for alcohol to slow your reflexes; drinking gives a false sense of confidence.
  • Legal limit: blood alcohol concentration of 0.08%. You can still be charged with impaired driving at any level if your ability to drive is impaired in any way.
  • Blood-alcohol chart (p. 60) estimates BAC from body weight and number of drinks.

Prescription drugs

  • Tranquillizers, antidepressants, sleeping pills and other psychotropic drugs can impair driving; effect on any person is unpredictable.
  • In a simulator test, diazepam or codeine worsened steering and braking and increased collisions.
  • Combined with small amounts of alcohol, effects of both are stronger: a driver below 0.08% can still be badly impaired.
  • Safe course: don't drive while on such a drug until you know you can drive safely on that dose; talk to your doctor. Never drive after drugs plus even small amounts of alcohol.
  • Insulin: too high a dose or a missed or late meal can cause low blood sugar: weakness, light-headedness, poor judgment, fainting. Diabetic pills can do the same.
  • Blood pressure pills often cause light-headedness, especially when treatment starts; don't drive until the doctor adjusts it.

Patent medicines

  • Antihistamines (in allergy, hay fever, cold and cough medicines) often cause drowsiness; none should be used when driving.

Illicit drugs

  • Appear to affect drivers much like alcohol.
  • Amphetamines (speed): irritability, feelings of persecution, hallucinations; one study found users had twice the crash rate of non-users.
  • Marijuana: definitely impairs driving; dulls thinking and slows eye-hand coordination; users felt more confident and less self-critical. LSD and similar drugs are even more dangerous.

Summary

  • Alcohol is a depressant, not a stimulant: it reduces alertness and slows reflexes.
  • Coffee, food or a cold shower may wake you up but won't sober you up. Only time works: the liver burns alcohol and it leaves through kidneys and lungs.
  • Check with your doctor about medications; never mix medication and alcohol.

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