Knowledge Test Class A - Louisiana Cdl

1 . If driving through flowing water or a large puddle, you should:

Increase your speed. Gently apply the brakes. Try to stop in the water. Click Here Full Cheat Sheet

2 . Mirrors should be used:

Only when there may be an emergency. Regularly. By a helper to monitor your blind spots. Take a FREE Practice Test Now

3 . Distracted driving can be avoided by:

Pre-programming radio stations. Smoking while driving. Eating while driving. Take a FREE Practice Test Now

4 . A tread depth of ____ should be in every major groove of a tire that is not in the front of a commercial motor vehicle.

1/32 of an inch 2/32 of an inch 4/32 of an inch Take a FREE Practice Test Now

5 . If a worker is present in a work zone, you should:

Continue driving at the posted speed limit. Slow to a speed under the posted speed limit. Drive in the grass. Click Here Full Cheat Sheet

6 . When trying to put out an electrical fire, you should:

Use water. Use a B:C extinguisher. Use an X extinguisher. Take a FREE Practice Test Now

7 . A driver should:

Always use turn signals when changing lanes. Only use turn signals if there is a vehicle next to them. Not use a turn signal if a lane change is obvious. Take a FREE Practice Test Now

8 . You may be an aggressive driver if you:

Expect delays on your drive. Slow down and maintain a reasonable following distance. Make hand gestures that could anger other drivers. Take a FREE Practice Test Now

9 . When a vehicle is started, the coolant temperature should:

Decrease. Rise slowly. Jump quickly. Click Here Full Cheat Sheet

10 . When you need to change lanes:

Other vehicles will likely get out of your way. You should change lanes slowly and smoothly. You should wait to change lanes until you are in an intersection. Take a FREE Practice Test Now

11 . A low air pressure warning signal should activate:

When tank pressure falls below 120 psi. When tank pressure falls below 60 psi. When tank pressure falls below 10 psi. Take a FREE Practice Test Now

12 . During a basic vehicle control skills test, a look is when:

A driver checks the gauges on their instrument panel. A driver checks their blind spots. A driver walks to the back of their vehicle to check its position. Take a FREE Practice Test Now

13 . When encountering a railroad crossing during the driving test, you should:

Pass another vehicle on the tracks if the other vehicle is moving too slowly. Change lanes while on the tracks. Not change gears while on the tracks. Click Here Full Cheat Sheet

14 . When pulled off on the side of the road:

A driver should keep the driver’s side door open. A driver should turn on the emergency flashers. The driver should wave their arms. Take a FREE Practice Test Now

15 . When traveling on a downgrade, your vehicle will:

Slow down. Travel at the same rate as on level roadway. Speed up. Take a FREE Practice Test Now

16 . Before a trip, you should make sure that:

The brake pedal sticks. The gas pedal is loose. The grooved pedal surface has not been smoothed out. Take a FREE Practice Test Now

17 . Why should the steps of a pre-trip inspection be done in the same order each time?

Because you will be less likely to forget to check something Because it will be faster Because it is required by law Click Here Full Cheat Sheet

18 . To prevent your vehicle from rolling backward when beginning to move, you can:

Partly engage the clutch before taking your foot off the brake pedal. Place the vehicle in second gear. Use the parking brake when stopping. Take a FREE Practice Test Now

19 . What happens if you don’t pass the air brakes endorsement test?

You won’t be permitted to drive a vehicle with air brakes. Your CDL will include an air brake endorsement marked with an asterisk. Your CDL will be invalid. Take a FREE Practice Test Now

20 . Skids caused by over-acceleration can usually be resolved by:

Removing your foot from the accelerator. Braking. Swerving to the right. Take a FREE Practice Test Now

21 . Pre-trip inspections are:

Recommended. Needed only for trips longer than 100 miles in length. Required by law. Click Here Full Cheat Sheet

22 . When traveling down a downgrade, the speed of a vehicle will likely:

Decrease. Stay the same. Increase. Take a FREE Practice Test Now

23 . Broken suspension parts:

Are not a cause for concern. Are extremely dangerous. Cannot be identified. Take a FREE Practice Test Now

24 . If a vehicle is accompanied by a vehicle inspection report:

The driver should first inspect the vehicle, then compare their notes with the report. The driver should first look at the report when completing an inspection. The driver should not conduct a pre-trip inspection and should rely only on the report. Take a FREE Practice Test Now

25 . When starting an engine as part of a pre-trip inspection, the driver should:

Listen for unusual noises. Place the engine in first gear. Turn on the heater. Click Here Full Cheat Sheet

26 . When loading a trailer, it is important to:

Place as little weight as possible over the axles. Place an appropriate amount of weight over the axles. Not be concerned with how the cargo's weight is distributed. Take a FREE Practice Test Now

Study tip: Reduce your study time from hours to minutes with a DMV exam “Cheat Sheet” 99.2% of people who use the cheat sheet pass the FIRST TIME Click Here Full Cheat Sheet

27 . When stopping, the brake pedal should be:

Pressed down quickly with both feet. Pressed down gradually. Lifted up quickly. Take a FREE Practice Test Now

28 . Some water and compressor oil is usually found in the compressed air within an air brake system. The water and compressor oil:

Are necessary for the proper function of the system. Should take up about 10 percent of the tank. Should be removed regularly. Take a FREE Practice Test Now

29 . Which of the following is not a cause of hydraulic brake failure?

Loss of hydraulic pressure Brake fade on long hills Downshifting Click Here Full Cheat Sheet

30 . The Individual Vehicle Distance Record (IVDR) does not need to include which of the following?

Trip origin Vehicle Identification Number Number of meals eaten by the driver Take a FREE Practice Test Now

31 . To obtain a hazardous materials endorsement, a person must be:

A U.S. citizen or permanent resident. Perform their own background check. New to the United States. Take a FREE Practice Test Now

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

Six to seven Seven to eight Eight to nine Four to five Take a FREE Practice Test Now

33 . Eating while driving:

Is a good way to maximize your time. Is encouraged during long trips. Is a distraction to the driver. Click Here Full Cheat Sheet

34 . What is brake lag?

The time required for the brakes to work after the brake pedal is pressed The distance between the brake pedal and the floor The amount of air pressure used to stop the vehicle Take a FREE Practice Test Now

35 . If your vehicle is hydroplaning, you should:

Use the accelerator. Not use the brakes. Put the vehicle in a higher gear. Take a FREE Practice Test Now

36 . Rims with welding repairs:

Are not safe to be used. Are acceptable to be used on tires on the rear of a vehicle. Are acceptable to be used only when carrying a heavy load. Take a FREE Practice Test Now

37 . Poisonous fumes can enter a cab due to:

A defective exhaust system. Using the wrong type of fuel. A lack of oil in the engine. Click Here Full Cheat Sheet

38 . An Anti-Lock Braking System (ABS):

Is not available for vehicles with air brakes. Is not helpful in most driving situations. Can help you maintain control when braking. Take a FREE Practice Test Now

39 . When driving, your mirrors should:

Not be used, as they are distracting. Not be used unless there is traffic. Be checked regularly. Take a FREE Practice Test Now

40 . The two indicators that determine when you should upshift are:

Engine speed and road speed. Other trucks and driving conditions. Timing and road position. Take a FREE Practice Test Now

41 . Why are multi-speed axles and auxiliary transmissions used?

To make a vehicle operate more smoothly To provide extra gears To improve a vehicle's gas mileage Click Here Full Cheat Sheet

42 . How should you brake if your vehicle's ABS is not working?

Brake normally, as you will still have functioning brakes. Pump the brake repeatedly. Press the brake pedal down as hard as you can. Take a FREE Practice Test Now

43 . Without engine oil:

A vehicle will get better gas mileage. An engine can be destroyed quickly. The ABS won’t work properly. Take a FREE Practice Test Now

44 . The steering wheel should be:

Held with both hands. Held with one hand to keep the other hand free. Held with one hand at a time, alternating between hands. Take a FREE Practice Test Now

45 . Overloading a vehicle with cargo:

Usually has no effect on the vehicle. Can impact steering and brake control. Can impact the cooling system. Click Here Full Cheat Sheet

46 . When driving in fog, you should:

Slow down. Speed up. Drive on the shoulder. Take a FREE Practice Test Now

47 . If the low air pressure warning signal comes on, you should:

Continue driving, but have the brakes repaired within a week. Pull over and inspect the brakes. Phone a mechanic while driving. Take a FREE Practice Test Now

48 . When making a tight maneuver, you should:

Not use your mirrors, as they can be distracting. Use your mirrors, but not too frequently. Use your mirrors frequently. Take a FREE Practice Test Now

49 . A driver may have:

An automobile license from one state and a CDL from another. Only one license. Two licenses: one for automobiles and one for trucks. Click Here Full Cheat Sheet

50 . If a speed limit is posted, the posted speed:

Should never be exceeded. May be exceeded if passing another vehicle. May be exceeded if driving in a rural area. Take a FREE Practice Test Now