oregon
CDL Practice Test

Welcome to the Oregon CDL practice test site. You can take these practice test questions as many times as you like, as all of the driving practice tests on this site are completely free. The questions are all derived from the Oregon CDL driving manual and should help you prepare for the official Oregon CDL test. You will be presented with 40 questions and you must answer 34 questions correctly to pass. There is a 50-minute time limit. You may not go back once you answer a question. Click the "Start Test" button below to begin.

1 / 40

Select the true statement:

Wait as long as possible to brake when driving a heavy vehicle.

Lighter vehicles requiring more braking power to stop compared to heavier vehicles.

A "bobtail" tractor will take longer to stop than a combination vehicle that is fully loaded down to the maximum weight.

None of the answers listed.

2 / 40

Two causes of tire fires are ______.

duals that touch and road debris

under-inflated tires and duals that touch

hot brakes and under-inflated tires

under-inflated tires and poor retreads

3 / 40

The Emergency Response Guidebook (ERG):

Contains an index of hazardous material id numbers, which is why you must label things correctly.

Is studied by emergency personnel to help keep the public safe.

All of these answers are correct.

Was created by the national department of transportation, so it is used nationwide.

4 / 40

What is the best way to prevent brakes form overheating while drive down a steep grade?

use the trailer brakes only

use the stab braking method

use countersteering practices

drive at a speed of 5 mph below your safe speed

5 / 40

Why should you use chocks when parking a trailer without spring brakes?

the trailer wheels are free to turn as there will be no emergency brakes should the air supply in the trailer air tank leak

the trailer wheels are free to turn as there will be no service brakes should the air supply in the trailer air tank leak

to prevent someone from stealing the vehicle

to prevent a runaway trailer

6 / 40

Select the true statement in regards to handing triples and doubles

a sudden movement of the steering wheel may result in the rear trailer tipping over

none of the answers listed

due to off tracking, a triple bottom rig can come to a stop quicker than a 5 axle semi trailer

due to the crack the whip effect, the rear trailer of a 100 foot triple is less likely to tip than a single trailer

7 / 40

Select the false statement about suspension:

Check for broken or cracked spring hangers.

Check to make sure torsion bars and/or arms are lubricated.

Check for shifted, missing, or cracked leaf springs.

Check for distorted or broken coil springs.

8 / 40

Select the true statement about what the Air Compressor Governor controls:

it controls when the air compressor pumps air into the storage tanks

it controls when the brakes will be applied

it controls when the warning system is activated

it controls when air is released from the storage tank

9 / 40

You should make sure the_____before backing under a trailer.

trailer brakes are locked down

tractor shut off valve is normal

air brakes have been shut off

landing gear is fully raised

10 / 40

What is the reason that placards are used?

communicate the risk

so hazmat is not mixed with food

to prevent terrorism

it is the law

11 / 40

For emergency braking to avoid a crash when driving a double trailer you should:

slam down the brake pedal and keep pressure on it

use the trailer brakes only

do stab or controlled braking

none of the answers listed

12 / 40

The trailer height is correct for connecting a converter dolly to a second trailer when:

the trailer will slightly lower when the converter dolly backed under it

the top of the kingpin lines up with the locking jaws

the trailer will slightly rise when the converter dolly is backed under it

the kingpin is resting behind the fifth wheel

13 / 40

To be sure that air is supplied to the second trailer:

keep an eye of the air gauge for a drop of 30 psi

while driving at 10 mph, use the hand valve. The vehicle should stop in the same distance of a single trailer moving at 5 mph

crank the engine brake

open the emergency line shut off at the back of the second trailer

14 / 40

When you discharge an unruly passenger, you must choose a place that is:

Off the regular route.

Dark and poorly lighted.

As safe as possible, or the next stop.

The next stop.

15 / 40

When arriving at the destination announce:

The location.

The reason for stopping.

All of these answers are correct.

The next departure time.

16 / 40

What does outage mean?

It is the allowance needed for the expansion of liquid.

It is the movement of the liquid.

It is how quickly the tanks drain.

It is the weight of the liquid.

17 / 40

To test the tractor-trailer connection for security, you should:

rock the trailer side to side with the trailer brakes on

drive forward in a low gear with the trailer brakes locked and then look at it carefully

drive forward with a sharp jerk

drive forward in a high gear with the trailer brakes on and check it

18 / 40

The container for the mechanism that transforms the steering column action into wheel action is:

Locking pin

Air brake system

Steering hoses/box

Steering linkage

19 / 40

The longest crack that brake or disc drums can have is:

1/2 inch across in a straight line.

Cracks are not permitted.

None of the answers listed.

1/2 the width of the friction area.

20 / 40

Select why you should not use the trailer hand valve while driving:

you should only ever use the parking brake

it will cause the tractor to shake

there is a possibility it will make the trailer skid

it does not work as well as the foot brake does

21 / 40

Select the action that is not appropriate when driving on slippery roads:

avoid having traffic in your side space

none of the answers listed

use a light pressure on the brake and accelerator pedals

use a speed retarder or engine brake

22 / 40

Tires should should be replaced:

if the tread depth on your front tires is less than 4/32 deep

when there are broken valve stems

all of these answers are correct

when the tread separates

23 / 40

Why is it dangerous to unlock the pintle hook with the dolly still under the rear trailer?

the kingpin may snap in half

the fifth wheel may be misaligned

the spring brakes may release

the dolly tow bar may fly up

24 / 40

What is most likely to occur when driving a set of doubles and a set of trailer wheels goes into a skid?

nothing will occur

no matter how you turn the steering wheel, the rig will continue in a straight line

there will be a trailer jackknife

the rig will slide sideways but stay in a straight line

25 / 40

Select the action that is not recommended when driving on slippery roads:

none of the answers listed

keep other drivers out of your side space

use a light pressure with the the brake and accelerator pedals

use a speed retarder or engine brake

26 / 40

This gauge will indicate if the generator or alternator is charging:

Coolant

Oil pressure

Gas tank

Voltmeter/ammeter

27 / 40

Should the air pressure in the service air tanks fall below____the driver must be alerted via warning mechanism in the truck cab.

80 psi

60 psi

30 psi

50 psi

28 / 40

When driving a combination vehicle, the trailer breaks away severing the air lines. The trailer brakes should come on and ____.

the tractor protection valve will close

the tractor to lose all air pressure in the tanks

the tractor will gain air pressure

the trailer supply valve will remain open

29 / 40

The most stable tanker shape is:

Elliptical

Square

Cylindrical

Round

30 / 40

What handling effect should you expect when your tank has baffles?

There will not be as much side to side surge compared to a tank without baffles.

There will not be as much front to back surge compared to a tank without baffles.

The surge will be slower than a tank without baffles.

There is no difference in handling when you have baffles.

31 / 40

Your rig should be parked on__to uncouple double trailers.

a downgrade

grass

level ground

the company's lot

32 / 40

A vehicle placarded for Division 1.1, 1.2, or 1.3 explosives:

May never be left unattended under any condition.

May not be parked on the cosignee's property.

May never be parked on private property.

May be left unattended in a safe haven.

33 / 40

What should the driver pay special attention to when driving smaller tanks?

The high center of gravity.

All answers listed.

The level of the fluid.

The distrubition of weight.

34 / 40

You can be sure air is supplied to the second trailer by:

going to the rear of the second trailer and open the emergency line shut off

while driving at 10 mph apply the hand valve you should stop at the same in the same distance as a single trailer driving at 5 mph

you should get out and listen for air flowing through the lines

watch the air gauge for a drop of 30 psi

35 / 40

The purpose for the emergency air line is:

supply air to the tractor air tanks and on combination vehicles controls the emergency brakes

supply air to the trailer air tanks and on combination vehicles, controls the service brakes

to supply air to the trailer air tanks and, on combination vehicles, controls the emergency brakes

none of the answers listed

36 / 40

When transporting hazardous loads, you must check the tires at least:

Every two hours or 100 miles.

Every 200 miles.

Twice every day.

Every six hours.

37 / 40

What is the next step after securing the bus when you have an unruly child on board?

Remove the student from the vehilce for the safety of the other children.

Call school administrator or the police to remove the student.

Stand up and speak respectfully to the offender, if a change of setting is needed, have the student move to a seat near you.

Unload the student at the next stop.

38 / 40

How do you make sure the trailer height is correct before coupling?

you do not need to do a visual check

visually check that the lead trailer is higher than the fifth wheel so that the trailer will lower when the dolly is pushed under it

visually check that they are level height wise

visually check that the rear trailer is lower than the fifth wheel so that the trailer raises slightly when the dolly is pushed under it

39 / 40

While completing the 2nd component of the air brake check you are required to turn the electrical power on, begin fanning off the air pressure by rapidly relasing and apply the foot brake and _____.

the tractor protection valve and parking brake valve should pop out before air pressure falls below 60 psi for combination vehicles

a low air warning device should sound before the air pressure drops below 40 psi

a low air warning device should sound before the air pressure drops below 60 psi

none of the answers listed

40 / 40

Select the true statement about speed and stopping distance.

When the road is wet it will double your stopping distance.

You need two times the stopping distance when driving at 40 mph compared to 20 mph.

None of these answers are correct.

Tank surge will decrease your stopping distance.

Your score is

The average score is 0%

5/5 - (2 votes)

CDL Category Practice Tests

CDL Practice Test

How To Get An oregon Commercial Drivers License

To be eligible for a CDL in Oregon, applicants must meet the following age eligibility requirements.

Be at least 18 years old to operate a commercial vehicle intrastate (within Oregon only).
Be at least 21 years old to operate a commercial vehicle interstate (outside of Oregon).

Oregon CDL applicants must be medically certified that they are physically capable of operating a commercial vehicle and pass a vision test. Oregon applicants must have the forms signed by a CDL-certified doctor.

Applicants are required to submit Form MCSA-5876, a Medical Examiner’s Certificate and Form 735-7369, a Self-Certification of CMV Driving Type.

All required paperwork must be completed before applying for a CDL. These documents must be brought to the appointment at the Oregon Department of Motor Vehicles.

Drivers who have had their licenses revoked, suspended, denied or canceled are not eligible for a CDL in Oregon. Applicants can be disqualified for having multiple licenses.

Oregon CDL Endorsements

H – Hazmat Vehicles
N – Tank Vehicles
P – Passenger Vehicles
S – School Bus
T – Double or Triple Trailer
X – Combination Tank Vehicles and Hazmat Vehicles

Hit the Open Road

oregon CDL License Test Tips

All Oregon CDL applicants must pass the general knowledge test prior to taking the skills test. This test consists of 50 questions. To pass the Oregon test, applicants must score 80 percent or higher. Applicants who require additional endorsements must pass additional tests and pay the required fees. The Oregon skills test can be taken 14 days after applicants pass the knowledge test. It includes a pre-trip vehicle inspection, basic control skills and on-road driving. Applicants must pass each section.

Military veterans and current military members can apply to have the skills exam waived if they meet the requirements.

To qualify for a waiver, applicants must:

Be active duty military personnel.
Operate a commercial vehicle as part of their military duties.
Have been discharged from the military within the past 12 months of applying for a CDL.
Submit an Application for CDL Skills Test Waiver.

Additional Information

Information on the Oregon Department of Transportation

The Oregon Department of Transportation administers CDL license regulations in Oregon. To get more information contact them via:

Website: https://www.oregon.gov/ODOT/DMV/Pages/DriverID/CDLget.aspx

Phone: 503.945.5000

Additional Oregon CDL Helpful Links

Please use the links below to access Oregon CDL testing resources and to learn more about practice driving tests for the state of Oregon.

oregon CDL Practice Test

CDL Category Practice Tests

CDL Practice Test

How To Get An oregon Commercial Drivers License

Hit the Open Road

oregon CDL License Test Tips

Additional Information

Information on the Oregon Department of Transportation

Additional Oregon CDL Helpful Links

oregon
CDL Practice Test