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Because the air gets old and needs to be replaced
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|
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Because compressed air contains some water and the water collects in the tanks
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|
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To allow for a change in pressure
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Maine CDL Permit Test - Knowledge Test Class A
(From the 2020 Maine CDL driver handbook)
| Number of questions: | 50 |
| Passing score: | 40 |
Directions:
This license is required for driving any legal combination of vehicles, with a gross combination weight rating of 26,001 pounds or more, provided the GVWR of a trailer exceeds 10,000 pounds To receive this license, applicants must pass a 50-question test. To pass, applicants must answer 40 questions correctly. Each question has three possible answer choices. Test questions come from the Maine Commercial Driver License Manual. Questions come from chapters covering: Introduction, Driving Safely, Transporting Cargo Safely, Air Brakes (if applicable), Combination, Doubles and Hazardous Materials. Endorsements that may be used with a Class A CDL are: Hazardous materials, Tank, Passenger, HazMat and Tank, Air Brakes and School bus.
Passing grade —
10 or fewer errors
advertising
1.
Why should you regularly drain the air tanks?
2.
When driving on a wet road, you should reduce your speed by:
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About one-half.
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|
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About one-third.
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|
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About one-quarter.
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3.
As the driver of a truck carrying a load, you are responsible for all of the following, except:
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Inspecting the cargo.
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|
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Recognizing poorly balanced weight.
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|
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Knowing the phone numbers of all fire departments along your intended route of travel.
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4.
Which of the following is not a warning sign of fatigue?
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Difficulty focusing
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|
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Staying within your lane
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|
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Rubbing your eyes
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5.
Some air brake systems introduce alcohol into the system to:
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Make the brakes work without squeaking.
|
|
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Prevent ice from forming in the brake system.
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|
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Prevent people from breathing the air from the system.
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6.
Which of the following is not a good rule when using turn signals?
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Signal early. Signal well before a turn or lane change.
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|
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Signal continuously. Do not cancel a signal until the turn is completed.
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|
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Don’t over-signal. If no one is near you, there is no need to signal.
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7.
How many daily hours of sleep does an adult need to maintain alertness?
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Six to seven
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|
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Seven to eight
|
|
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Eight to nine
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