1 . Tread depth in the major grooves on a front tire should be at least:

1/32 of an inch.
2/32 of an inch.
4/32 of an inch.
3/4 of an inch.
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2 . If a truck is equipped, a trailer brake hand valve can be used to:

Add fuel to the truck.
Prevent the truck from rolling back when being started from a stop.
Check the engine oil level.
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3 . A person working on a disabled vehicle on the shoulder of a road:

Will likely pay attention to traffic on the road.
May be focused on the repair and not paying attention to roadway traffic.
Is exempt from traffic laws.
Should not be assisted.
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4 . To apply for a CDL, you must be at least:

15 years old.
18 years old.
21 years old.
25 years old.
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5 . While driving downhill, you should brake until you reach a speed that is ____ below your safe speed, then release the brake pedal.

5 mph
10 mph
15 mph
20 mph
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6 . Rough acceleration:

Is a good way to stay awake on long trips.
Is distracting.
Can cause mechanical damage.
Should be used to prevent rust from forming.
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7 . When going downhill, shifting into neutral is an effective way to slow down a vehicle.

True
False
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8 . When going downhill, switching into a lower gear is an effective way to slow a vehicle.

True
False
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9 . What happens when a person is caught violating a state texting law for the second time in three years?

They will lose their CDL for 10 days.
They will lose their CDL for 60 days.
They will lose their CDL for six months.
They will lose their CDL for one year.
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10 . An example of required emergency equipment is:

A spare electrical fuse.
A loud horn.
A battery-operated flashlight.
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11 . A rear tire with a tread depth of 1/32 an inch is acceptable.

True
False
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12 . A broken exhaust system:

Can allow poisonous fumes into the cab.
Does not cause problems.
Should not cause concern.
Helps the vehicle run better.
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13 . If equipped, a header board should:

Be damaged.
Be loose.
Be strong enough to contain cargo.
Light up when the engine is started.
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14 . Which of the following is not required safety equipment?

A fire extinguisher
A liquid burning flare
An axe
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15 . You must have an air brake endorsement:

To use a vehicle with air brakes.
To drive any truck with a trailer.
To transport hazardous materials.
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16 . Noting the engine speed is one way to determine when to upshift.

True
False
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17 . Cargo on flatbed trailers should be:

Tied down.
Glued down.
Left loose.
Pushed to one side.
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18 . The minimum age someone may be to apply for a CDL is 18 years old.

True
False
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19 . Testing positive for any amount of alcohol while still below the legal limit will result in a driver being placed out-of-service for 24 hours.

True
False
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20 . Which of the following is acceptable?

Dual tires that do not come into contact with each other
Tires of mismatched sizes if used only on short trips
Retreaded tires on the front of a school bus
Tires with cracks
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21 . A broken exhaust system poses no threat to the driver.

True
False
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22 . Pressing and releasing the brake pedal unnecessarily can:

Release air faster than it can be replaced.
Add more air to a brake system.
Make the brake pedal harder to depress.
Create a loud noise.
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23 . When stopping a manual transmission vehicle, what should you do when the engine is close to idle?

Push in the clutch.
Push out the clutch.
Shift into neutral.
Shut off the vehicle.
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24 . Convex mirrors:

Cannot be used on vehicles transporting hazardous materials.
Can replace flat mirrors.
Can be help a driver see a large area.
Are illegal in most states.
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25 . A person will lose their CDL for one year for a first conviction of driving with a minimum blood alcohol concentration (BAC) of:

0.04 percent.
0.08 percent.
0.1 percent.
0.12 percent.
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26 . Examples of serious traffic violations include each of the following offenses, except:

Improper lane usage.
Having multiple licenses.
Using a cell phone.
Not stopping behind the stop line at a stop sign.
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27 . Texting while driving is worrisome:

Because it creates both mental and physical distractions.
Because a message may be upsetting to the driver.
Because the texts may be more interesting than the task of driving.
Because it is less efficient than a phone call.
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28 . To stop in a vehicle that uses air brakes, the driver should:

Pull the air brake lever.
Engage the brake lever.
Push the brake pedal down.
Pull the brake pedal up.
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29 . How can you prevent drowsiness before a trip?

Get about four hours of sleep.
Plan stopping points into your trip in advance.
Drive alone.
Schedule long trips at night.
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30 . What can happen if one-fourth of the leaves in a leaf spring are missing when a vehicle is inspected?

The vehicle’s driver will be allowed to drive, but only at reduced speeds.
The vehicle will be put out-of-service until it is fixed.
The vehicle will be fine to drive since most of the spring is in place.
The driver will be asked to decrease the weight of the load.
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31 . At what psi is the safety valve set to open?

100 psi
150 psi
200 psi
500 psi
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32 . If an air compressor is belt-driven, the belt should be routinely checked to ensure that it is:

Thin.
Properly tightened.
Cracked.
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33 . Drivers may use ____ red reflective warning triangles when their vehicle is stopped on the side of the road.

Two
Three
Five
Seven
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34 . 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.
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35 . A light usually illuminates when gears should be shifted.

True
False
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36 . What must be on an air tank in an air-braked vehicle?

A check valve
A lock
A trap door
An oxidizer
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37 . Which of the following is not an example of a driving hazard?

An accident on the roadway
An open road
A police car assisting a motorist on the side of the road
An ice cream truck
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38 . When switching gears, what happens if you remain in neutral for too long?

The vehicle will speed up.
You may have trouble getting the vehicle into the next gear.
You may kill the engine.
The vehicle will be difficult to stop.
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39 . Dry bulk tanks:

Usually have low centers of gravity.
Usually have high centers of gravity.
Usually are not allowed to cross railroad tracks.
Cannot be driven on interstates.
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40 . When entering fog, you should:

Put on your high beam headlights.
Increase your speed.
Turn up the volume of the radio.
Slow down.
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41 . When passing another vehicle, you should:

Make eye contact with the other driver.
Assume the other driver doesn’t see you.
Honk your horn.
Wave to other drivers.
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42 . Laws about securing loads and regulating CMV weights may vary from state to state. During interstate travel:

The law of the state in which the trip originated takes precedence.
The law of the state the vehicle is in takes precedence.
The driver should request federal regulations to override conflicting state laws.
The driver can choose which state’s laws to follow.
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43 . When asked to complete a conventional parallel parking maneuver, you should:

Pass the parking space while backing, then pull forward into it.
Pull forward past the parking space, then back into it.
Pull forward into the parking space without passing it first.
Back into the parking space without passing it first.
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44 . Dual tires should be in contact with each other.

True
False
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45 . 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.
When tank pressure falls below 5 psi.
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46 . Header boards:

Should never be used.
Protect the driver from being hit by cargo.
Protect the driver's head when entering the cab of a truck.
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47 . If a CMV driver operates a CMV with a detectable blood alcohol concentration (BAC) that is lower than 0.04 percent, they will be:

Told to stop drinking.
Put out-of-service for 24 hours.
Required to drive at speeds below 55 mph.
Told to drive home.
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48 . What is a danger of rolling back when you start to accelerate?

The transmission may be damaged.
The truck is not made to go backwards.
You may hit a vehicle behind you.
You may lose your position in traffic.
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49 . Alcohol is removed from the body:

At a rate that changes depending on how much alcohol is in the body.
At a consistent rate, regardless of how much alcohol is in the body.
More quickly if the person drinks coffee.
More quickly if the person stays awake.
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50 . Which of the following statements is correct?

Rims with a missing lug nut are acceptable if there are at least four other lug nuts on the rim.
A cracked lock ring is acceptable if the vehicle is being driven at speeds under 55 mph.
A missing clamp is dangerous and should be corrected.
Welded repairs are acceptable for wheels on rear axles.
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