Knowledge Test Class B #2
Class B Driving Test | South Carolina 2024 #2 Page 3 of 7
Train for FREE online with our South Carolina 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 SC 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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15 . Which of the following is not a type of retarder?
Retarders are mechanisms in some vehicles that help slow the vehicle and reduce the need for braking. The four basic types of retarders are exhaust, engine, hydraulic, and electric.
16 . Which of the following is not an indication of damaged brakes?
Pads free of oil or grease
Potential problems to check for when inspecting brakes include cracked drums; shoes or pads with oil, grease, or brake fluid on them; and shoes that are missing, broken, or worn dangerously thin.
17 . A tank endorsement is:
Optional when transporting hazardous materials.
Subject to certain conditions, a tank endorsement is required to operate a tank vehicle that is used to haul either liquids or gases.
18 . During an applied leakage test, the maximum leakage rate for a double combination vehicle is:
4 psi in a minute.
It is important to know the maximum air loss rate that is safe for your specific vehicle. A double combination vehicle should have a leakage rate no higher than 4 psi in a minute during an applied leakage test.
20 . If hydraulic brakes fail, a driver can reduce their speed by:
Letting the truck run out of gas.
If your hydraulic bakes fail, shifting into a lower gear can help slow your vehicle down.
21 . Which of the following is not a type of retarder?
Electric
