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Missouri CDL DMV Knowledge Test Class B 1

Take 4 practice tests for CDL is the best way to prepare for your Missouri DMV exam is by taking our free practice tests. The following question are from real Missouri DMV practice test. More than 95% people pass a DMV exam when practice at DMV Practice Test.

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1. The tire load:
Can be exceeded in cooler conditions.
Is the maximum safe weight a tire can carry at a given pressure.
Must be written in the shipping papers.

Tire load is the maximum weight a tire can safely carry at a given pressure. This rating is stated on the side of each tire.

2. When slowing down, you should ____ to warn other drivers
Use a turn signal
Sound your horn
Tap your brakes

Before slowing down, it can be a good idea to lightly tap your brakes. This will cause your brake lights to flash, providing a warning to motorists behind you.

3. Which gas would cause concern due to a faulty exhaust system?
Carbon monoxide

A leaking exhaust system can introduce carbon monoxide, which is poisonous, into the cab or sleeper berth.

4. When passing another vehicle, you should:
Make eye contact with the other driver.
Assume the other driver doesn't see you.
Slow down.

Whenever you pass another driver, bicyclist, or pedestrian, you should assume as a precaution that they do not see you.

5. What is road rage?
Operating a motor vehicle with the intent of doing harm to others
Operating a motor vehicle that is deemed unsafe
Operating a motor vehicle that has not been inspected

Aggressive driving is defined as operating a motor vehicle in a selfish, bold, or pushy manner. Road rage is defined as operating a motor vehicle with the intent of doing harm to others, or the intent of physically assaulting another driver or their vehicle.

6. How does doubling your speed from 20 mph to 40 mph affect your vehicle's braking distance?
It stays about the same.
It doubles.
It quadruples.

Increasing your vehicle's speed will increase your vehicle's striking power and braking distance. Doubling your vehicle's speed from 20 to 40 mph will quadruple its braking distance.

7. Your CDL will be revoked if:
You want to add an endorsement.
Your privilege to operate your personal vehicle is revoked.
You have not paid a toll.

If your privilege to operate your personal vehicle is revoked, canceled, or suspended due to moving traffic violations, you will also lose your CDL. This does not apply if your license is revoked due to parking violations.

8. ____ is a thin layer of ice that forms on road surfaces.
White ice
Black ice
Green ice

Black ice is a thin layer of ice that is clear enough for the road surface to be seen through it. A road covered in black ice may look like it is merely wet instead of icy. Always be on the lookout for black ice if a road surface looks wet and temperatures are around the freezing mark.

9. If a load is 40 feet long, it should be secured by at least ____ tie-downs.

Cargo should be restrained by at least one tie-down for every 10 feet of cargo. However, all cargo should have at least two tie-downs, no matter the size of the cargo.

10. One way to prevent fatigue on long trips is to:
Take frequent breaks.
Text while driving.
Drink caffeine.

To avoid becoming fatigued on a long trip, you should take a break after every 100 miles or two hours of driving. Driving through the night, or during any other time when you would normally be asleep, raises the danger of fatigue.

11. When approaching a vehicle for a pre-trip inspection, a driver should look under the vehicle:
To see if the vehicle is on an incline.
To see if there are any fresh fluids on the ground.
To see if the vehicle is in a parking spot.

When approaching your vehicle before an inspection, make note of its general condition and ensure that it is not damaged or leaning. Look under the vehicle for fresh leaks of oil, grease, or fuel. Check around the vehicle for hazards to movement, such as people, other vehicles, or low-hanging wires or tree limbs.

12. Oversized loads:
Can never be transported by a truck.
Should only be transported during the day.
Should receive proper authorization to ensure compliance with state and local laws.

Special permits are required for loads that are over-size, over-length, or overweight.

13. By beginning a left turn before reaching the center of an intersection, you:
Will likely complete the turn satisfactorily.
May hit other vehicles with the left side of your vehicle.
Can expect other drivers to move their vehicles to accommodate your turn.

When planning to turn left at an intersection, make sure you have reached the center of the intersection before beginning the turn. If you turn too soon, off-tracking may cause the left side of your vehicle to hit another vehicle.

14. If you are confronted by an aggressive driver, you should:
Make eye contact.
Ignore their gestures.
Try to race.

If you encounter an aggressive driver, you should not let yourself be provoked by any angry gestures they make toward you. Avoid making eye contact with the other driver and do not try to race them.

15. On any upgrade, gravity will:
Speed your vehicle up.
Slow your vehicle down.
Not impact your speed.

A vehicle will be slowed down by gravity on any uphill grade. You may need to switch to a lower gear to climb a steep grade.

16. Items on a flatbed:
Are usually heavy enough to not need to be strapped down.
Should not be strapped down if you are driving more slowly than 35 mph.
Must always be secured.

On flatbed trailers and trailers without sides, cargo must be tied down to prevent it from shifting or falling off in transit.

17. To ensure normal stopping power, drivers of vehicles equipped with a front brake limiting valve should:
Set the control to normal.
Set the control to the off position.
Set the control to the neutral position.

Some older vehicles have front brake limiting valves with "normal" and "slippery" settings. Setting a brake limiting valve to "slippery" reduces the vehicle's stopping power, so a driver should make sure the valve is in its "normal" position. Front wheel braking has proven to be effective in all driving conditions.

18. If convicted of any traffic violations, excluding parking violations, you must:
Notify your employer within 30 days.
Place a sign on the back of your vehicle noting the conviction.
Forfeit your CDL for six months.

If you are convicted of any kind of traffic violation, in any type of vehicle, you must notify your employer within 30 days. You must also inform your motor vehicle licensing agency of the violation within 30 days if the conviction happened in another jurisdiction. This rule does not apply to parking infractions.

19. When a vehicle is started, the coolant temperature should:
Rise slowly.
Jump quickly.

After an engine is started, the coolant temperature should rise gradually to a normal operating range.

20. When taking the on-road driving skills test:
You do not have to take the test with the type of vehicle for which you want to be licensed.
You must take the test with the type of vehicle for which you want to be licensed.
It does not matter which type of vehicle you use to take the test.

CDL skills tests, including the on-road test, must be taken with the type of vehicle for which you want to be licensed.

21. 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.

As the first step of a vehicle inspection, a driver should review any inspection report left by the previous driver.

22. A stopped bus:
Is not a cause for concern since it is stopped.
Is only a concern if passengers are exiting the bus.
Is a concern whether or not passengers are visible.

You should always exercise caution when driving near a stopped bus. There could be passengers in the vicinity and the bus may either prevent them from seeing you or you from seeing them.

23. The two indicators that determine when you should upshift are:
Engine speed and road speed.
Other trucks and driving conditions.
Timing and road position.

There are two indicators that determine when you need to shift into a higher gear. One indicator is the engine speed (rpm). You should read your vehicle's manual to learn its rpm range and shift up when you reach the top of that range. The other indicator is road speed (mph). You should learn which speeds each gear can accommodate, then keep an eye on the speedometer and shift up as needed.

24. If you plan to slow down, you can warn drivers behind you by:
Slamming on the brakes.
Tapping the brakes a few times and before braking.
Turning on one set of turn signals.

Before slowing down, it is a good idea to flash your brake lights by lightly tapping your brake pedal a few times. This will warn drivers behind you of your plans to slow down.

25. Aggressive driving is:
Operating a vehicle in a selfish or pushy manner.
Operating a vehicle with a strong regard for other motorists’ safety.
Operating a vehicle in the left lane.

Aggressive driving is the act of operating a motor vehicle in a selfish, bold, or pushy manner and without regard for the rights or safety of other road users.

26. If you are driving in fog, you should not:
Turn on the four-way flashers.
Slow down.
Use your high beam lights.

If you must drive in fog, be sure to slow down. Turn on your flashers and low beam headlights.

27. Talking on a hands-free phone while driving:
Does not distract the driver.
Only distracts the driver if the driver is speaking.
Can be distracting to the driver.

While speaking on a hands-free phone while driving is less dangerous than speaking on a hand-held phone, it is just as likely to mentally distract a driver. Simply engaging in conversation takes their mental focus away from the task of driving.

28. When inspecting the windshield before a trip, a person should do all the following, except:
Remove and sharpen the wiper blades.
Check the windshield wipers for proper spring tension.
Check the wiper blades for damage.

When inspecting your windshield, you should look for cracks or other problems that could interfere with your ability to clearly see the road. The windshield wiper arms should be checked for proper spring tension. The wiper blades should be checked for damage, stiff rubber, and improper securement.

29. Steering wheel play should be no more than:
10 degrees.
50 degrees.
75 degrees.

A steering wheel should have no more than 10 degrees of play. This is equal to about two inches of movement at the rim of a 20-inch wheel. If there is more play than this, it may be difficult to steer.

30. During a pre-trip inspection, belts should be:
Left alone and not inspected.
Checked for tightness.
Inspected, but only about once a month.

When inspecting your vehicle, you should check all belts for tightness and excessive wear.

31. During a pre-trip inspection, belts should be:
Checked for tightness.
Scrubbed clean.
Left alone and not inspected.

When inspecting your vehicle, you should check all belts for tightness and excessive wear. You should learn how much "give" is appropriate for each belt.

32. As the driver of a truck carrying a load, you are responsible for all of the following, except:
Inspecting the cargo.
Recognizing poorly balanced weight.
Knowing the phone numbers of all fire departments along your intended route of travel.

It is the driver's responsibility to inspect their cargo; recognize overloading or poorly balanced weight; know that the cargo is properly secured and does not obscure the driver's view; and know that the cargo does not restrict access to emergency equipment. The driver is responsible for their cargo even if they were not the one who initially loaded and secured the cargo.

33. What can happen if the air pressure gets too low in an air brake system?
The brakes may squeak.
The brakes may stop working.
The brakes may be sluggish.

Pressing and releasing the brake pedal unnecessarily can let air out of the braking system faster than the compressor can replace it. Air brakes may cease to work effectively if the pressure becomes too low.

34. Water that has collected on a roadway can cause:

The risk of hydroplaning begins when water has collected on the surface of a road.

35. Rims with welding repairs:
Are not safe to be used.
Are acceptable on combination vehicles.
Are acceptable only when traveling at speeds under 40 mph.

Wheels or rims that have had welding repairs are never safe for use.

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