Knowledge Test Class B #2

Class B Driving Test | Iowa 2025 #2 Page 6 of 7

Train for FREE online with our Iowa 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 IA CDL class B permit in 2025, practice as much as.. Read More

Train for FREE online with our Iowa 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 IA 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.

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36 . Driving at night is:

Driving at night is more dangerous than driving during the day because hazards become more difficult to see in the dark.

37 . 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.

38 . Hanging meat as cargo is usually:

A cargo of hanging meat can be very unstable, both because the meat swings about in transit and because its center of gravity is high.

39 . When a vehicle is started, the coolant temperature should:

After an engine is started, the coolant temperature should rise gradually to a normal operating range.

40 . If a five-foot-long item is placed on a flatbed trailer, it must be secured by at least:

Cargo that is required to be tied down should be secured by at least one tie-down for every 10 feet of cargo length. However, at least two tie-downs should be used no matter how small the cargo is.

41 . If unable to tell if the road is becoming icy and slippery, a driver:

If you think the road surface may be becoming icy but you are not certain, you can open your window and feel the front of the side mirror, mirror support, or antenna. If ice has formed on any of these items, the road is likely becoming icy as well.

42 . An after-trip inspection should be done:

You should always complete an after-trip inspection of your vehicle at the end of a trip, day, or tour of duty. Complete a vehicle inspection report, if required.

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