Knowledge Test Class A #1
Class A Driving Test | Utah 2025 #1 Page 3 of 7
Train for FREE online with our Utah class A 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 UT CDL class A permit in 2025, 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 A requirements may vary from state to state.
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15 . What must be on an air tank in an air-braked vehicle?
An oxidizer
All air tanks on air-braked vehicles must have one-way check valves located between the air compressor and the first reservoir. This prevents air from flowing out in the event of a leak.
16 . Examples of serious traffic violations include each of the following offenses, except:
Not stopping behind the stop line at a stop sign.
Traffic violations classified as "serious" include excessive speeding, reckless driving, operating a CMV without a valid CDL, following other vehicles too closely, and improper lane usage. Consequences for multiple serious traffic violations can result in license disqualification.
17 . When passing another vehicle, you should:
Wave to other drivers.
It is always safest to assume that other drivers, bicyclists, and pedestrians don't see you. Be prepared for the possibility that they may suddenly move into your path. It may be safe to lightly tap your horn or flash your lights as you pass.
18 . Header boards:
Front-end header boards, also known as "headache racks," protect the driver from cargo moving in the event of a crash or emergency stop.
19 . A low air pressure warning signal should activate:
When tank pressure falls below 5 psi.
In an air brake system, a low air pressure warning signal must come on if air pressure in the tanks falls below 60 psi. This warning signal may come in the form of a light, a buzzer, or a wig wag.
20 . The minimum age someone may be to apply for a CDL is 18 years old.
You must be at least 18 years old to apply for a CDL. However, you must be at least 21 years old to drive in interstate commerce, as well as to have a hazardous materials, passenger, or school bus endorsement.
21 . If a CMV driver operates a CMV with a detectable blood alcohol concentration (BAC) that is lower than 0.04 percent, they will be:
Told to drive home.
