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Not both be in contact with the road surface.
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Not touch one another.
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Be different sizes from one another.
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Tennessee CDL Permit Test - Knowledge Test Class A
(From the 2021 Tennessee 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 or four possible answer choices. Test questions come from the Commercial Driver License Manual. Questions come from chapters covering: Introduction, Driving Safely, Transporting Cargo Safely, Air Brakes (if applicable), Pre-Trip Vehicle Inspection Test, Basic Vehicle Control Skills Test and On-Road Driving.. 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
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1.
Dual tires should:
2.
How many air storage tanks are used in an air brake system?
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Two tanks
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Four tanks
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Six tanks
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The number varies.
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3.
When testing a parking brake, the vehicle should:
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Not be running.
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Be placed in a low gear while the driver attempts to pull forward.
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Be inspected by a professional mechanic.
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Be driven while the parking brake is applied.
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4.
Brake fade is a result of:
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Brakes being exposed to sunlight.
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Brakes being exposed to moisture.
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Excessive use of the brakes.
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5.
In bad weather, many drivers:
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Like to drive in front of trucks.
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Like to be on the side of trucks.
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Like to follow trucks.
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Like to drive without using their lights.
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6.
An Anti-Lock Braking System (ABS):
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Cannot be used with air brakes.
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Should be used on dry pavement.
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Can assist in maintaining control when braking.
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Should only be used if all axles have ABS.
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7.
When it is difficult to see other vehicles, such as at dawn or dusk, you should:
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Keep your lights off.
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Turn your lights on.
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Drive on the shoulder.
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