CDL Commercial Driver's License

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Question 1

If you swing wide to the left before turning right, another driver may try to pass you on the
right.

  • A. True
  • B. False


Answer : A

Question 2

You can safely remove the radiator cap as long as the engine isnt overheated.

  • A. True
  • B. False


Answer : B

Question 3

Why should you be in the proper gear before starting down a hill?

  • A. You will not be able to shift into a lower gear once you are going down the hill.
  • B. Because you will need to be in the same gear at the bottom of the hill.
  • C. It is the law in most states.
  • D. There is no need to do this.
  • E. Because the clutch is made to be used on even surfaces.


Answer : A

Question 4

Name some important steering system parts?

  • A. rim, lug nuts, tire
  • B. tie rod, spindle, pitman arm
  • C. leaf spring, vehicle frame, tourque rod
  • D. main spring, axle, spring shackle


Answer : B

Question 5

With the controlled braking method, you _______

  • A. Lightly apply braking pressure
  • B. Apply the brakes as hard as you can without locking the wheels
  • C. Apply the brakes all the way until the wheels lock up, release the brakes and apply them again when the wheels start to roll again
  • D. Repeatedly tap the brakes as fast as you can


Answer : B

Explanation: The correct answer is: Apply the brakes as hard as you can without locking the wheels. In addition, you should keep your steering movements very small while using a "controlled braking" method.

Question 6

You should let air out of hot tires so the pressure goes back to normal.

  • A. True
  • B. False


Answer : B

Question 7

What is your most important way to see the sides and rear?

  • A. Rear view cameras.
  • B. Your mirrors.
  • C. Roll the window down.
  • D. A Helper.
  • E. All of the above.


Answer : B

Question 8

You should decrease your following distance if somebody is following you too closely.

  • A. True
  • B. False


Answer : B

Question 9

What is hydroplaning?

  • A. A term used for quickly planning an alternate route due to heavy rain.
  • B. When tires lose their contact with the road and have little or no traction due to water on the road.
  • C. The amount of traction a truck has due to the weight of the vehicle on slippery surfaces.
  • D. A water spill on the road that came from a water truck.


Answer : B

Question 10

If you go twice as fast, will your stopping distance increase by two or four times?

  • A. Two
  • B. Four
  • C. None of the above


Answer : B

Question 11

What is black ice?

  • A. Ice that turns black in extreme temperatures.
  • B. Ice that is more slippery than white ice.
  • C. A thin layer of ice that is clear enough that you can see the road underneath it. It makes the road look wet.
  • D. A thick layer of ice that is hard to see on a black top road.
  • E. None of the above


Answer : C

Question 12

If stopped on a hill, how can you start moving without rolling back?

  • A. Leave the trailer brakes on and drag the tires releasing the brake after you are moving forward.
  • B. Put blocks behind the tires.
  • C. Increase Engine rpm's and let the clutch out quickly.
  • D. Partly engage the clutch before you take your right foot off the brake.
  • E. None of the above


Answer : D

Question 13

Name two situations where legal maximum weights may not be safe to haul?

  • A. In large cities and over bridges.
  • B. During bad weather or in mountains.
  • C. Through tunnels and over bridges.
  • D. At night or during rush hour traffic.


Answer : B

Question 14

What should wheel bearing seals be checked for?

  • A. Color changes
  • B. Smoke
  • C. Leaks
  • D. Gasoline
  • E. All of the above.


Answer : C

Question 15

It is important for driving safety to always be looking ahead. Which of the following is NOT
a recommended time/distance that you should be looking ahead?

  • A. About 12-15 seconds
  • B. About one block for city driving
  • C. About 1/4 mile for open highway driving
  • D. About 5 car lengths on the highway


Answer : D

Explanation: The correct answer is: About 5 car lengths. It is important to look ahead about 12-15 seconds to insure you have adequate time to stop or change lanes if necessary. 12 to 15 seconds is equivalent to about one city block or 1/4 mile on the open highway. Looking ahead 5 car lengths (about 70 feet) will not give you adequate time to react.

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