Vermont CDL — General Knowledge practice
Vermont CDL — General Knowledge: Alcohol & Drugs practice test
Blood alcohol limits, zero-tolerance and implied-consent laws, and how alcohol and drugs — legal or not — affect your driving.
Content reviewed against official driver handbooks · August 12, 2026
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12 sample Alcohol & Drugs questions with the correct answer, a short explanation, and the official handbook reference. Read through them, then take the quiz above.
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1. Which substance appears on the manual's list of drugs an employer must test commercial drivers for?
Correct answer: Phencyclidine (PCP)
The list is marijuana metabolites, cocaine metabolites, amphetamines, opioids and phencyclidine (PCP).
Source: Vermont Commercial Driver's Manual — Drug and Alcohol Testing Requirements
2. A Vermont CDL driver who is subject to DOT drug testing has a medical recommendation to use marijuana. What does the manual say?
Correct answer: It is prohibited, whether the use is recreational or medicinal
Marijuana is a controlled substance under federal law. Drivers who must comply with DOT drug testing may not use it for recreational or for medicinal purposes.
Source: Vermont Commercial Driver's Manual — Drug and Alcohol Testing Requirements
3. What does the manual say happens when a driver or an employer fails to comply with the DOT drug and alcohol testing regulations?
Correct answer: They face fines and penalties imposed at the federal level
Both drivers and employers who fail to comply face fines and penalties, and the manual specifies that these are federally imposed.
Source: Vermont Commercial Driver's Manual — Drug and Alcohol Testing Requirements
4. Vermont exempts municipal and government employees from the medical requirements when they drive commercial vehicles on official duties. Does that also free them from DOT drug and alcohol testing?
Correct answer: No; testing still applies to government drivers who need a CDL or CDP
The medical exemption is separate. The drug and alcohol testing requirements apply to everyone who must hold a CDL or CDP, and the manual names state, county and municipal government drivers as included.
Source: Vermont Commercial Driver's Manual — Drug and Alcohol Testing Requirements
5. Among the testing circumstances the manual lists, which one is described as drug testing only, with no alcohol test mentioned?
Correct answer: Pre-employment testing
Only the pre-employment item is described as drug testing. The random and post-accident items each cover drugs and alcohol, and the reasonable-suspicion item covers drugs and/or alcohol.
Source: Vermont Commercial Driver's Manual — Drug and Alcohol Testing Requirements
6. A Vermont owner-operator who employs only himself says DOT drug and alcohol testing applies just to drivers who work for a company. What does the manual say?
Correct answer: The rules cover every driver who needs a CDL or CDP, the self-employed included
The testing requirements reach all drivers who must have a CDL or CDP. The manual specifically includes government employees and drivers who employ themselves.
Source: Vermont Commercial Driver's Manual — Drug and Alcohol Testing Requirements
7. What must employers of commercial drivers give their drivers regarding drugs and alcohol?
Correct answer: A written policy covering alcohol and drug use, misuse and testing
Anyone who employs commercial drivers has to hand them a policy, in writing, about drug and alcohol use, misuse and testing.
Source: Vermont Commercial Driver's Manual — Drug and Alcohol Testing Requirements
8. Preparing the route carefully is one of the manual's ways to prevent drowsiness before a trip. What should that preparation identify?
Correct answer: Total distance, stopping points and other logistics
Careful route preparation is meant to pin down the total distance, the stopping points and other logistic considerations before the trip starts.
Source: Vermont Commercial Driver's Manual — Section 2.11.2, Driver Factors
9. Which of these is NOT one of the circumstances the manual lists for DOT drug or alcohol testing?
Correct answer: Testing at every license renewal
The listed circumstances are pre-employment drug testing, random testing, post-accident testing, and testing when an employer reasonably suspects a violation.
Source: Vermont Commercial Driver's Manual — Drug and Alcohol Testing Requirements
10. An employer's written drug and alcohol policy must cover several topics. Which of these is NOT one the manual names?
Correct answer: Pay rates for time spent being tested
Among other topics, the policy has to describe how testing is done, when drivers will be tested, what conduct is prohibited, and what happens to drivers who break the testing rules.
Source: Vermont Commercial Driver's Manual — Drug and Alcohol Testing Requirements
11. How many drug categories does the manual list for the tests an employer must run on commercial drivers?
Correct answer: Five
Five are listed: marijuana metabolites, cocaine metabolites, amphetamines, opioids and phencyclidine (PCP).
Source: Vermont Commercial Driver's Manual — Drug and Alcohol Testing Requirements
12. An applicant for a Vermont HazMat endorsement has a felony conviction for distributing a controlled substance. Under the security standards printed in the manual, when does that offense bar the endorsement?
Correct answer: When convicted in the 7 years before applying, or released from incarceration in the 5 years before
Controlled substance felonies are on the second list of disqualifying offenses. They bar the endorsement when the conviction falls in the 7 years before the application, or when release from incarceration for the offense came in the 5 years before it.
Source: Vermont Commercial Driver's Manual — Standards for Federal Security Threat Assessment
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