FREE Massachusetts CDL Practice Test 2024 - DMV Practice Test Page 3 of 7
Testing your knowledge from the Massachusetts Commercial Driver's Manual on topics like signaling, road safety, handling road conditions, best driving practices, and safety rules before taking your final written exam is not only a great way to ensure a passing score, but it will also help you become a safer CMV driver. The next 50 questions are based on one in the manual that you should be able to answer for your exam, according to the Massachusetts RMV. Each question includes a tip as well as an explanation to help you fully grasp the concept and answer similar problems in the future. As they say, practice makes perfect, so keep trying until you achieve perfection.
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15 . To stop a vehicle using air brakes:
The brake knob should be pushed in.
To stop normally in a vehicle with air brakes, press down the brake pedal.
16 . Most heavy-duty vehicles use:
Quadruple air brake systems.
Most heavy-duty vehicles use dual air brake systems. A dual system has two separate air brake systems with a single set of controls.
17 . Blocking a load:
Can only be done in dry weather.
Cargo should be blocked to prevent it from sliding around in transit. The shifting of weight in transit can make steering and handling difficult for the driver.
18 . When using your mirrors, you should frequently look at your tires to:
Get a sense of the size of the tire in relation to other vehicles.
Check your tires regularly when looking in your mirrors. This helps ensure that you will notice a tire fire, if one should happen. Tire fires may occur when a tire is under-inflated, if dual tires are touching, or if the tires are otherwise overheated.
19 . What is reaction distance?
The distance traveled between physically hitting the brake and coming to a complete stop
Reaction distance is the distance traveled between the moment you mentally recognize a hazard and when you physically hit the brakes.
20 . A vehicle’s center of gravity is:
Very important.
To reduce the risk of a vehicle tipping over, it is very important to keep its center of gravity from becoming too high.
21 . The suspension system:
Lightens the load for the tires.
