Combination Vehicles Practice Test | New Jersey 2025 #2 Page 2 of 3
Train for FREE online with our New Jersey 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 NJ combination license 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 DMV requirements for issuing a combination license may vary from state to state.
8 . ____ are the cause of more than half of all accident-related truck driver deaths.
More than half of all accident-related truck driver deaths are a result of truck rollovers. To help prevent a rollover, be sure to load cargo low to the ground and centered on your rig. Take corners slowly and carefully.
9 . To prevent a rollover, cargo should be:
To reduce the risk of rollover, the weight of cargo in a trailer should be centered and spread out as much as possible. The weight of the cargo should also be kept as low to the ground as possible.
10 . Which of the following types of vehicles is most prone to the “crack-the-whip" effect?
Double and triple combinations are the most vulnerable to turning over as a result of the "crack-the-whip" effect.
11 . If oil and water build up in your vehicle's air tanks, the brakes:
Air tanks should be drained daily to remove water and oil buildup. An excess of oil and water in the air tanks can interfere with proper brake function.
12 . The trailer hand valve should:
The trailer hand valve works the trailer brakes but should only be used when testing them. Using it while driving could create a skid. Never use the trailer hand valve while parking because doing so may release the air pressure from the braking system, releasing the brakes that are holding the vehicle in place.
13 . The easiest way to recognize that your trailer has begun to skid is to:
The easiest way to spot a trailer skid is to use your mirrors. Any time you brake hard, check your mirrors to ensure that your trailer is still in its proper position.
14 . What does the trailer air supply control look like?
On newer vehicles, the trailer air supply control is an eight-sided red knob. It's used to control the tractor protection valve.
See the exact questions that will be on the 2025 New Jersey DMV exam.
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