20 Tests

CDL Combination Vehicles Practice Test Online | New Hampshire 2021

Train for FREE online with our New Hampshire 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 NH combination license in 2021, practice as much as.. Read More

Train for FREE online with our New Hampshire 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 NH 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 does an Anti-Lock Braking System (ABS) do?

An Anti-Lock Braking System (ABS) helps prevent wheel lockup during hard braking. If ABS detects impending lockup, it reduces braking pressure to a safe level.

2 . When a combination vehicle goes around a corner:

It is acceptable for street signs to be knocked over if they are too close to the road. When a vehicle goes around a corner, the rear wheels follow a different path than the front wheels. This is called off-tracking. This effect is especially pronounced on vehicles with trailers.

3 . When coupling:

Incorrect coupling and uncoupling of combination vehicles can have extremely dangerous consequences.

4 . When traveling more slowly than 40 mph, maintain at least ____ of following distance per every 10 feet of your vehicle.

Four seconds At speeds below 40 mph, you should allow at least one second of following distance for every 10 feet of your vehicle. Follow the same formula when traveling at faster speeds, then add one additional second to your following distance. Remember that larger vehicles require more space to stop than smaller vehicles.

5 . Trailers with low underneath clearance may be difficult to drive:

At the posted speed limit. Railroad-highway crossings may be difficult to cross when pulling a trailer with a low underneath clearance. In particular, both low-slung units and single-axle tractors pulling long trailers are especially challenging to drive over raised crossings.

6 . If the trailer begins to skid, it is best to:

Brake. If your trailer begins to skid, you should release the brakes to help regain traction. Once the wheels grip the road again, the trailer will begin to straighten out and follow the path of the tractor.

7 . The best way to notice if a trailer has begun to skid is to:

Feel the tractor move. The easiest way to become aware that your trailer has begun to skid is to observe it in your mirrors. Checking your trailer in your mirrors will also allow you to spot any skidding at the earliest possible moment.

Wait, before you go

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