CDL General Knowledge Practice Test 2026: Quiz di prova 2

Quiz di prova 2 di 6 per CDL General Knowledge Practice Test: altre 25 domande con risposte e spiegazioni.

Veicoli commerciali
Stati Uniti
150 domande
Verificato: 10 ottobre 2026

Domanda 1 di 25
For a first Class A or Class B CDL, when must entry-level driver training be finished?
- Before your first renewal
- Before you take the CDL skills test
- Within one year after you get your CDL
- Before you take the knowledge test
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Risposta: B. Before you take the CDL skills test
ELDT must be completed before the skills test for a first Class A or Class B CDL.
Domanda 2 di 25
A Class B CDL holder wants to upgrade to Class A. Is entry-level driver training needed?
- Yes
- No, a Class B holder is exempt
- Only if they will haul hazmat
- Only if they are under 21
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Risposta: A. Yes
Upgrading from Class B to Class A is one of the cases that requires ELDT.
Domanda 3 di 25
Under federal rules, how old must you be to drive a commercial motor vehicle in interstate commerce?
- 18
- 21
- 19
- 25
Mostra la risposta
Risposta: B. 21
A driver must be at least 21 years old to drive a CMV in interstate commerce.
Domanda 4 di 25
Who may do your DOT medical exam?
- A medical examiner on FMCSA's National Registry
- Your company's safety manager or dispatcher
- Any licensed nurse at a walk-in clinic
- A pharmacist who checks your medicines
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Risposta: A. A medical examiner on FMCSA's National Registry
The physical exam must be done by a medical examiner on the National Registry of Certified Medical Examiners.
Domanda 5 di 25
How often must most CDL drivers pass a DOT medical exam?
- Every 6 months
- Every 5 years
- Only once, before the first CDL
- At least every 24 months
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Risposta: D. At least every 24 months
Most drivers must be re-examined if they have not been certified in the last 24 months. Some conditions need a new exam every 12 months.
Domanda 6 di 25
What distant vision does a CMV driver need in each eye, with or without glasses?
- At least 20/20
- At least 20/100
- At least 20/40
- At least 20/60
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Risposta: C. At least 20/40
The vision standard is at least 20/40 in each eye, with or without corrective lenses.
Domanda 7 di 25
What field of vision must a CMV driver have in each eye?
- At least 70 degrees side to side
- At least 120 degrees side to side
- At least 30 degrees side to side
- At least 45 degrees side to side
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Risposta: A. At least 70 degrees side to side
Drivers need a field of vision of at least 70 degrees in the horizontal meridian in each eye.
Domanda 8 di 25
How well must a commercial driver read and speak English?
- English is not required for drivers who cross state lines
- Well enough to talk with the public, read signs and fill out reports
- Well enough to pass a college-level English writing class
- Only well enough to read the CDL manual before the test
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Risposta: B. Well enough to talk with the public, read signs and fill out reports
Federal rules require enough English to converse with the public, understand traffic signs, respond to official questions and make report entries.
Domanda 9 di 25
You are convicted of a traffic violation (not parking) in any vehicle. How soon must you tell your employer?
- Within 1 year
- Only if it happened in a CMV
- At your next license renewal
- Within 30 days
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Risposta: D. Within 30 days
Commercial drivers must notify their employer within 30 days of a traffic conviction, other than parking, in any type of vehicle.
Domanda 10 di 25
When you apply for a commercial driving job, how many years of past employment must you list?
- 2 years
- 20 years
- 5 years
- 10 years
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Risposta: D. 10 years
You must give your employer information about all driving jobs you held in the past 10 years.
Domanda 11 di 25
How many driver's licenses may a commercial driver hold?
- As many as you need
- Two: one CDL and one regular license
- One for each state you drive in
- Only one
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Risposta: D. Only one
You may hold only one license. Having more than one can bring a fine or jail.
Domanda 12 di 25
What alcohol concentration is the legal limit for driving a commercial motor vehicle?
- 0.08%
- 0.10%
- 0.02%
- 0.04%
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Risposta: D. 0.04%
Driving a CMV with an alcohol concentration of 0.04% or more is a disqualifying offense.
Domanda 13 di 25
How long before going on duty or driving a CMV must you stop using alcohol?
- At least 1 hour
- At least 24 hours
- At least 4 hours
- At least 8 hours
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Risposta: C. At least 4 hours
You may not use alcohol within 4 hours before going on duty or driving a CMV.
Domanda 14 di 25
You are found with any detectable alcohol while on duty, but under 0.04%. What happens?
- Nothing, because you are under the limit
- You lose your CDL for life
- You get a warning only
- You are put out of service for 24 hours
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Risposta: D. You are put out of service for 24 hours
A driver with any measured alcohol or detected presence of alcohol is placed out of service for 24 hours.
Domanda 15 di 25
A driver is convicted for the first time of driving a CMV under the influence. The load was not hazmat. What is the disqualification?
- At least 60 days
- At least 3 years
- For life
- At least 1 year
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Risposta: D. At least 1 year
A first conviction for a major offense such as DUI brings a disqualification of 1 year when no hazmat is involved.
Domanda 16 di 25
What is the disqualification for a first DUI conviction while hauling placarded hazardous materials?
- At least 3 years
- At least 120 days
- At least 6 months
- At least 1 year
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Risposta: A. At least 3 years
First convictions for major offenses while transporting hazardous materials carry a 3-year disqualification.
Domanda 17 di 25
What is the usual penalty for a second conviction of a major offense, such as DUI, in a CMV?
- A fine only
- Disqualification for life
- Disqualification for 1 year
- Disqualification for 120 days
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Risposta: B. Disqualification for life
A second conviction for a major offense generally brings a lifetime disqualification.
Domanda 18 di 25
While driving a CMV, you refuse a police officer's request to take an alcohol test. How is this treated?
- As a major offense, like DUI
- As a minor warning
- As a parking violation
- It has no effect on your CDL
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Risposta: A. As a major offense, like DUI
Refusing an alcohol test is a major offense, with the same 1-year first-time disqualification as DUI.
Domanda 19 di 25
You are convicted of two serious traffic violations in a CMV within 3 years. How long is the disqualification?
- At least 30 days
- At least 1 year
- At least 60 days
- At least 120 days
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Risposta: C. At least 60 days
A second serious traffic violation within 3 years brings a 60-day disqualification.
Domanda 20 di 25
What happens after a third serious traffic violation in a CMV within 3 years?
- At least a 120-day disqualification
- A lifetime disqualification
- At least a 60-day disqualification
- A warning letter
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Risposta: A. At least a 120-day disqualification
Three or more serious traffic violations within 3 years bring a 120-day disqualification.
Domanda 21 di 25
Which of these is a serious traffic violation for a CDL holder?
- An expired registration sticker
- A parking ticket
- Driving 5 mph over the limit
- Speeding 15 mph or more over the limit
Mostra la risposta
Risposta: D. Speeding 15 mph or more over the limit
Excessive speeding of 15 mph or more over the limit is listed as a serious traffic violation.
Domanda 22 di 25
How are texting and using a hand-held phone while driving a CMV treated?
- They are allowed if you hold the phone below the window
- They are allowed at speeds under 25 mph
- As minor offenses with no effect on the CDL
- As serious traffic violations that can lead to disqualification
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Risposta: D. As serious traffic violations that can lead to disqualification
Texting and using a hand-held mobile phone while driving a CMV are both serious traffic violations.
Domanda 23 di 25
When may you use a hand-held phone while driving a CMV?
- When you are stopped at a red light
- When your dispatcher needs to reach you
- Only to call police or emergency services
- When traffic is light on the highway
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Risposta: C. Only to call police or emergency services
Federal rules ban hand-held phone use while driving a CMV, except to contact law enforcement or emergency services.
Domanda 24 di 25
You are convicted of a railroad crossing violation in a CMV for the first time. What is the disqualification?
- At least 60 days
- At least 10 days
- At least 1 year
- For life
Mostra la risposta
Risposta: A. At least 60 days
A first railroad-highway grade crossing violation brings a disqualification of no less than 60 days.
Domanda 25 di 25
What is the disqualification for a first conviction of driving while under an out-of-service order (no hazmat or passengers)?
- For life
- 2 to 5 years
- 180 days to 1 year
- 30 to 60 days
Mostra la risposta
Risposta: C. 180 days to 1 year
A first out-of-service order violation brings a disqualification of no less than 180 days and no more than 1 year.

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