Stimulant drugs, including caffeine, are not helpful as a way of avoiding fatigue. They may help keep you awake, but will not make you any more alert. Feeling tired is a sign that your body needs sleep, and the only way to properly address it is to stop driving and get some sleep.

Drive as fast as possible so you get to the destination quickly.

Tar in road pavement often rises to the surface of the road, or "bleeds," in very hot weather. Watch for such areas because they can be very slippery.

Offer the same amount of traction as the rest of the roadway.

Offer more traction than the rest of the roadway.

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.

When tank pressure falls below 60 psi.

When tank pressure falls below 120 psi.

When tank pressure falls below 60 psi.

When tank pressure falls below 10 psi.

When tank pressure falls below 5 psi.

When doing a pre-trip inspection on a vehicle with power steering, be sure to check the hoses, pumps, and fluid level. In particular, you should check the hoses for leaks.

Secure connections to the battery.

Extra hose pieces available for repairs.

You should cover your cargo to protect people from the cargo if it spills, as well as to protect the cargo from the weather.

To protect the cargo from animals

To protect people from spilled cargo

To protect the cargo from weather

To protect the cargo from animals

Class B Driving Test | South Dakota 2025 #1 Page 5 of 7

Train for FREE online with our South Dakota 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 SD CDL class B 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 B requirements may vary from state to state.

Number of Question 50

Passing Score 40

Number of Tests 20

Class B Driving Test | South Dakota 2025 #1 Page 5 of 7

29 . If you are being tailgated, you should:

30 . If you’re feeling tired before a drive, you should:

31 . In hot weather, spots on the pavement where tar is bleeding:

32 . A low air pressure warning signal should activate:

33 . When checking power steering hoses during a pre-trip inspection, you should look for:

34 . When coming to a stop, you should apply the brake pedal by:

35 . Which of the following is not a reason to cover cargo?

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