Knowledge Test Class A #2

FREE Michigan CDL Practice Test 2022 - DMV Practice Test

Your understanding of traffic signs, signals, right-of-way rules, trucking legislation, speed limits, vehicle inspection, and fundamental commercial vehicle safety will be put to the test in order to help you become a safer driver today. Each of our 50 multiple-choice questions is based on the Michigan Commercial Driver License Manual and state.. Read More

Your understanding of traffic signs, signals, right-of-way rules, trucking legislation, speed limits, vehicle inspection, and fundamental commercial vehicle safety will be put to the test in order to help you become a safer driver today. Each of our 50 multiple-choice questions is based on the Michigan Commercial Driver License Manual and state statutes. There is a tip and an explanation for each question. It is suggested that you read the explanation for each question to obtain a better understanding of the rule being assessed.

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1 . During an inspection, slack adjusters on S-cam brakes should not move more than:

Check each slack adjuster after parking on level ground, setting wheel chocks, and disengaging the parking brake. Pull the slack adjusters to make sure they do not move more than about one inch from where the push rod is attached. If they move more than one inch, they may be out of adjustment and will need to be fixed.

2 . When traveling down a hill, you can reduce the amount of required braking by:

Before starting down a hill, decelerate and shift down into a gear that will allow you to control your vehicle without braking too hard. Using too much brake when driving downhill can cause the brakes to overheat, reducing the braking power.

3 . What should happen before the air pressure in an air brake system tank falls below 55 psi?

The low air pressure warning signal must activate before the air supply pressure drops below 55 psi in the air tank. If the warning signal does not turn on when being tested during an inspection, the vehicle is not safe to drive.

4 . The ____ are activated by an electric switch that is triggered by the brake pedal.

In a vehicle with air brakes, the brake lights are activated when the brake pedal is pushed and air pressure moves an electric switch. With the application of air pressure, the switch will then turn on the brake lights.

5 . How many daily hours of sleep does an adult need to maintain alertness?

Four to five Being properly rested is essential to the safe operation of a CMV. To maintain alertness, most people need eight to nine hours of sleep per night.

6 . Poisonous fumes can enter a cab due to:

A faulty exhaust system is a serious safety hazard. It may allow poisonous fumes to enter the vehicle's cab or sleeper berth.

7 . Mirrors should be:

When driving, you should regularly check your mirrors, both to be aware of traffic and to check for problems on your own vehicle.

Wait, before you go

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