20 Tests
CDL Combination Vehicles Practice Test Online | Nebraska 2021
Train for FREE online with our Nebraska 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 NE 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.
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1 . What is a bobtail?
A tractor that goes slower than the speed limit
Tractors without semi-trailers are referred to as bobtail tractors. Operating a bobtail tractor requires drivers to exercise caution.
2 . To help prevent a rollover, cargo should be:
If a vehicle is top-heavy, it is more likely to roll over. The weight of cargo should be positioned as low in a trailer as possible to minimize this risk.
3 . To help prevent rollovers, you should:
Keep the load on one side of the trailer.
To lower the risk of a rollover, load your cargo as closely to the ground as possible. To further reduce this risk, take curves and corners slowly.
4 . To prevent a trailer from rolling over, you should:
Drive slowly around corners.
To reduce the risk of a rollover when driving a combination vehicle, you should keep the weight of the cargo as low to the ground as possible and drive slowly around turns.
5 . What is a tractor protection valve?
A valve that prevents the trailer from accidentally being released
In a combination vehicle with air brakes, the tractor protection valve keeps air in the tractor or truck brake system in the event of the trailer breaking away or developing a leak.
6 . Using the trailer hand brake while experiencing a trailer jackknife will:
Continue the skid.