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Driving Test
Missouri
Missouri CDL Knowledge Test Class A 1
Answers
Q.1.
A low air pressure warning signal:
Is not recommended on vehicles with air brakes.
Is required on vehicles with air brakes.
Is optional on vehicles with air brakes.
Q.2.
Blocking cargo:
Should never be done.
Should be done to prevent the shifting of cargo.
Can only be done with metal pieces.
Q.3.
If you are driving at a reduced speed in a construction zone when you spot a construction worker near the road, you should:
Speed up.
Stay at your current speed.
Further reduce your speed.
Q.4.
If you see taillights ahead while you are driving in fog:
The lights may not indicate where the road is as the vehicle may have pulled off the roadway.
You can assume the vehicle ahead is on the road.
It may be an optical illusion.
Q.5.
To make your vehicle more visible during the day, you should:
Use your low beam headlights.
Use your high beam headlights.
Use your clearance lights.
Q.6.
When backing a truck, you should:
Only use the side mirrors on the driver’s side.
Use both side mirrors.
Never use a helper.
Q.7.
When applying for a hazardous materials endorsement, being found guilty of which of the following is a disqualifying offense?
Arson
Speeding
Littering
Q.8.
When driving a vehicle equipped with an Anti-Lock Braking System (ABS), you should:
Always pump the brakes several times before holding down the brake pedal.
Brake normally.
Press down the brake pedal as hard as possible every time you slow or stop.
Q.9.
To ensure that you do not slow down traffic when driving a large truck, you should:
Switch gears while driving uphill.
Try to pass another vehicle while driving uphill.
Stay in the right lane whenever possible.
Q.10.
ABS allows you to:
Drive faster.
Brake harder.
Stay in control when stopping.
Q.11.
Hydroplaning:
Rarely happens to trucks.
Usually happens when vehicles are traveling at speeds above 65 mph.
Can occur with a minimal amount of water on the roadway.
Q.12.
During the driving test, when encountering a railroad crossing, you should:
Pass another vehicle on the tracks if the other vehicle is going too slow.
Get out of the vehicle to check for a train.
Not change gears while your vehicle is on the tracks.
Q.13.
If unable to tell if the road is becoming icy and slippery, a driver:
Should try guessing.
May open their window and feel the front of the side mirror for ice.
Should look at the road closely.
Q.14.
Rough acceleration:
Is recommended.
Can cause mechanical damage.
Is required on slippery surfaces.
Q.15.
If a load is 10 feet long, it must be secured by a minimum of ____ tie-downs.
Two
Three
Four
Q.16.
When driving in winter, which of the following should receive extra attention in a pre-trip inspection?
Coolant and antifreeze levels
The air conditioning unit
The oil pressure
Q.17.
Alcohol can be removed from your system:
By exercising.
By drinking coffee.
By waiting.
Q.18.
Parked delivery trucks may be hazardous because:
The trucks are often shiny.
People are often in a hurry when exiting such trucks and may not look for other vehicles.
Packages often fall out of the trucks and into the road.
Q.19.
Applicants seeking a hazardous materials endorsement must pass a threat assessment through which agency?
The TSA
The FBI
The CIA
Q.20.
When it’s difficult to see, such as at dawn or dusk, a driver can increase their vehicle's visibility by:
Driving while using their lights.
Driving with their windows open.
Flashing their lights periodically.
Q.21.
If there is a fire in your vehicle and you are not sure how to extinguish it, you should:
Use a fire extinguisher.
Try douse the flames with water.
Move away from the flames and wait for the firefighters.
Q.22.
When drivers turn, they usually:
Look in the direction of the turn.
Look in the direction opposite the turn.
Look behind their vehicles.
Q.23.
Backing with a trailer is dangerous because:
It is difficult to see behind the vehicle.
Most trucks do not have the ability to move in reverse.
Cargo may fall out of the trailer.
Q.24.
After a vehicle is started, warning lights and buzzers:
Should stay on for several minutes.
Should turn off within a few seconds.
Should stay on until manually turned off.
Q.25.
Pre-trip inspections should be done:
Differently each time in order to place emphasis on different items.
The same way each time to prevent you from forgetting anything.
Once in a while.
Q.26.
After an accident, flares should be used with caution because:
There may be fuel spilled on the ground that could catch fire.
Other drivers may not see the flares if the weather is sunny.
Flares are expensive.
Q.27.
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.
Q.28.
When operating a truck requiring a CDL:
You are never required to wear a seat belt.
You are required to wear a seat belt, but only if transporting more than 500 pounds of cargo.
You must always wear a seat belt.
You are required to wear a seat belt, but only if you are driving a tank vehicle.
Q.29.
Which gas would cause concern due to a faulty exhaust system?
Oxygen
Carbon monoxide
Nitrogen
Q.30.
When inspecting your vehicle, you should check for all of the following, except:
Too much air pressure in your tires.
Too little air pressure in your tires.
A consistent name brand across all of your tires.
Q.31.
____ is a thin layer of ice that forms on road surfaces.
White ice
Black ice
Green ice
Q.32.
Within 10 minutes of stopping on the side of the road, you must:
Place emergency warning devices.
Alert local law enforcement.
Call a mechanic.
Q.33.
Black ice is:
Usually thick.
Usually thin.
Not a hazard when driving.
Q.34.
An alcohol evaporator is especially important:
In cold weather.
In hot weather.
In dry weather.
Q.35.
A person driving with an open window in cold weather may be:
A distracted driver.
A person who is dressed inappropriately.
A person who likes fresh air.
Q.36.
Which of the following is not a reason to cover cargo?
Protecting people from spilled cargo
Protecting the cargo from the weather
Preventing other drivers from looking at what is being transported
Q.37.
To avoid a collision with a hazard on the roadway:
You should always try to stop.
Swerving may be a safer option than stopping.
You should never swerve.
Q.38.
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.
Q.39.
The leakage rate for a triple combination vehicle with air brakes should be no more than ____ in one minute during a static leakage test.
8 psi
5 psi
3 psi
Q.40.
A pre-trip inspection:
Should be done in the same way every time.
Should be done differently every time.
Does not always need to include all items of concern.
Q.41.
A low air pressure warning signal:
Is not required on vehicles with air brakes.
Is required on vehicles with air brakes.
Is optional on vehicles with air brakes.
Q.42.
When traveling down a steep downgrade:
The air brakes should be used.
The vehicle should be placed in a low gear and the driver should use engine braking.
The driver should continually downshift instead of using the brakes.
Q.43.
When driving, being aware of what is happening behind you is:
Not important.
Important.
Distracting.
Q.44.
What does the air compressor governor do?
It stops the compressor from pumping air.
It turns on the air compressor.
It stores the compressed air.
Q.45.
Rust around wheel nuts may mean:
It rained recently.
The nuts are loose.
The nuts are too tight.
Q.46.
Rust around wheel nuts may mean:
It recently rained.
The nuts are loose.
The tire is not clean.
Q.47.
To warn drivers behind you that you will be slowing down, you should:
Turn on the right turn signal followed by the left turn signal.
Tap your brake pedal a few times to illuminate your brake lights.
Swerve from side to side to get their attention.
Q.48.
If an unusual noise or feeling occurs in a vehicle while it is being driven, the driver should:
Assume it is not a concern and continue driving.
Hope the vehicle does alright until it is switched to another driver.
Check the situation to determine the proper solution.
Q.49.
Mirrors should be:
Checked only when changing lanes.
Checked frequently.
Checked only if there is a reason to suspect a problem.
Q.50.
A broken exhaust system can:
Let poisonous fumes into the cab.
Improve fuel efficiency.
Make steering more difficult.
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