Knowledge Test Class B #1
Class B Driving Test | Oregon 2024 #1 Page 4 of 7
Train for FREE online with our Oregon class B license test. The official exam test consists of several obligatory parts, with all of them checking your knowledge of different blocks of road rules. If you need to obtain a OR CDL class B permit in 2024, practice as much as possible. Free sample tests published on our website will help you check and improve your knowledge and boost your grades. Please bear in mind that CDL class B requirements may vary from state to state.
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22 . The use of a hand-held mobile device while driving is:
Using a hand-held mobile telephone while operating a CMV is both illegal and dangerous.
23 . What is the minimum permitted size of a placard?
32 square inches
Hazardous materials must be diamond-shaped and a size of at least 10 ¾ square inches.
24 . Which of the following is not a problem?
Exhaust system parts that are not leaking
When inspecting an exhaust system, you should verify that parts of the system are not loose, broken, or missing. The system's parts must be properly mounted and should not be rubbing against moving parts of the vehicle.
25 . Which of the following is not a sign of bad brakes?
When inspecting your brakes, you should check for cracked drums; shoes or pads covered in oil, grease, or brake fluid; and shoes that are missing, broken, or worn dangerously thin.
26 . When a vehicle is started, the coolant temperature should:
After an engine is started, the coolant temperature should begin a gradual rise toward the normal operating range.
27 . A truck should be parked:
Because you can't see everything behind you, backing is always dangerous and should be avoided whenever possible. Choose parking spaces from which you can pull forward when you leave.
28 . To inspect slack adjusters on S-cam brakes, you need to:
Chock the wheels and disengage the parking brake.
