FREE North Carolina CDL Practice Test 2024 - DMV Practice Test Page 2 of 7
To help you become a safer driver today, your understanding of traffic signs, signals, right-of-way rules, trucking legislation, speed limits, vehicle inspection, and fundamental commercial vehicle safety will be assessed. The North Carolina Commercial Driver's Manual and applicable North Carolina statutes are used to create each of our 50 multiple-choice questions. A tip and an explanation are included with each question. It is recommended that you read the explanation for each question to obtain a better understanding of the rule being examined.
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8 . How many air storage tanks are used in an air brake system?
The number varies.
Air storage tanks are used to hold compressed air. The number and size of air tanks in an air brake system varies among vehicles.
9 . If a roadway is covered by fog, it is best for you to:
Avoid driving.
Driving in fog is always dangerous. If possible, you should always avoid driving under foggy conditions.
10 . In a dual air brake system, if one air system is very low on pressure:
In a dual air brake system, either the front or rear brakes will not be fully operable if one of the air systems gets too low on pressure. If the air pressure in either tank gets too low while you are driving, you should exit the road and park as soon as possible.
11 . Service brakes should:
Before driving, you should always verify that your service brakes are in good working order. Testing the brakes before a trip allows you to locate any problems before you need to brake while on the road.
12 . To confirm that a trailer has ABS, you can:
Remove a tire and look for the ABS sensor on the axle.
If you are unsure if a trailer is equipped with an Anti-Lock Braking System (ABS), look under the vehicle for the electronic control unit and wheel speed sensor wires coming from the back of the brakes.
13 . Areas of the road that are shaded:
Should always be avoided.
Because they are exposed to less sunlight, shaded patches of road will stay cooler longer than other areas of the road. Due to the lack of direct sunlight, shady areas can remain icy and slippery after ice on other areas of the road has melted.
14 . When carrying a sealed load, the driver:
Should unseal the load to ensure safety.
