FREE CDL Combination Vehicles Practice Test Online | Pennsylvania 2024 Page 3 of 3
Train for FREE online with our Pennsylvania CDL combination vehicle 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 PA combination license in 2021, 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 DMV requirements for issuing a combination license may vary from state to state.
15 . An air supply control lever should be in its "normal" position when you are:
Tractor protection controls in older vehicles may be operated by levers instead of knobs. If an air supply control is set in its "normal" position, it is properly set for you to pull a trailer.
16 . Failure to keep the fifth wheel plate properly greased could:
Failure to keep the fifth wheel plate properly lubricated can create friction between the tractor and trailer, causing steering problems.
17 . Pull out the trailer air supply control to test:
Be sure to test the trailer emergency brakes before beginning a trip. After ensuring that the trailer rolls freely, you can test the emergency brakes by pulling out the trailer air supply control, or placing it in the "emergency" position. Pull forward slightly with the tractor and make sure the trailer does not move.
18 . When connecting a converter dolly to a second or third trailer, the trailer height should be:
When connecting a converter dolly to a second or third trailer, the trailer height should be correct. It should be slightly lower than the center of the fifth wheel.
19 . Rollovers happen when:
Rollovers happen when a vehicle is driven too fast. To reduce the risk of rollover, make sure the weight of cargo is loaded low to the ground, and that you take turns and curves slowly.
20 . Avoid needing to make sudden lane changes by:
Making a sudden lane change can be dangerous when driving a combination vehicle. Avoid the need to make a sudden lane change by looking down the road for upcoming obstacles that will require you to change lanes.
See the exact questions that will be on the 2024 Pennsylvania DMV exam.
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