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Drugs practice questions

24 questions from the cdl hours of service and trip planning practice test.

Drugs practice test

10 questions, graded as you go, with the reason for every answer. No sign-up.

What this covers

Sample questions

A driver's alcohol test shows a concentration of 0.03. What must happen?

  1. The driver may keep driving because the result is under 0.04
  2. The driver is kept off safety-sensitive work for at least 24 hours
  3. The driver must complete the full return-to-duty process
  4. The driver's CDL is disqualified for one year
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B. The driver is kept off safety-sensitive work for at least 24 hours

A result of 0.02 or more but less than 0.04 is not a rule violation requiring a substance abuse professional, but the driver must be removed from safety-sensitive functions for at least 24 hours. Carrying on because the result is below 0.04 is the mistake.

Reference: 49 CFR 382.505

An officer finds that a commercial driver has used alcohol within the past 4 hours. For how long is the driver placed out of service?

  1. 8 hours
  2. 10 hours
  3. 24 hours
  4. 72 hours
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C. 24 hours

A driver found in violation of the alcohol prohibitions is placed out of service immediately for 24 hours. Ten hours is the off-duty period in the hours-of-service rules and has nothing to do with alcohol.

Reference: 49 CFR 392.5(c)

Which group of drugs does a DOT drug test look for?

  1. Marijuana, cocaine, opioids, barbiturates and LSD
  2. Marijuana, alcohol, opioids, amphetamines and PCP
  3. Marijuana, cocaine, opioids, amphetamines and PCP
  4. Cocaine, opioids, steroids, amphetamines and PCP
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C. Marijuana, cocaine, opioids, amphetamines and PCP

The DOT panel covers five drug classes: marijuana, cocaine, opioids, amphetamines and phencyclidine (PCP). Alcohol is tested separately by breath or saliva, and barbiturates, LSD and steroids are not on the panel.

Reference: 49 CFR Part 40, Subpart F (40.82, 40.85)

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