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

How do you check the coolant level?

While wearing rubber gloves and safety glasses.

Inspect the reservoir sight glass or remove the radiator cap if the engine isn't hot.

Remove the radiator cap once it is at operating temperature.

None of the answers listed.

2 / 40

The locking jaws of the kingpin should close around:

the apex

the tip

the base

the shank

3 / 40

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

use a light pressure with the the brake and accelerator pedals

none of the answers listed

keep other drivers out of your side space

use a speed retarder or engine brake

4 / 40

Which of the following three hazard classes should NOT be placed into a temperature-controlled trailer (one with a heater/air conditioner unit)?

Classes 1, 3, and 6

Classes 1, 3, and 4

Classes 1, 21, and 3

Classes 1, 4, and 51

5 / 40

Why should you know the outage?

Heavier liquids don't require outage.

Baffles are not always permitted with certain types of liquids.

Just in case you become a contestant in a trivia competition.

Liquids expand different amounts.

6 / 40

Buses may NOT have recapped or regrooved tires:

On front wheels.

On the outside rear wheels.

When it's been raining.

Anywhere except on the front wheels.

7 / 40

Class A explosives must not be transported in a combination vehicle if the vehicle includes:

Two or more trailers.

None of these answers are correct.

A placarded cargo tank.

A 200 inch wheelbase trailer.

8 / 40

After coupling with a trailer, what position should the front trailer supports be in before driving away?

in the fully raised position with the crank handle secured to its bracket

raised half way with the crank handle stored in the cab

none of the answers listed

raised to the top and then taken 3 cranks down and the crank handle stored in its bracket

9 / 40

Wet brakes can cause _____.

brakes to apply unevenly

all of these answers are correct

pulling to one side or the other

lack of braking power

10 / 40

How do you check the air compressor governor "cut in" and "cut out" pressures?

monitor the air pressure gauge

run the engine at a fast idle

decrease the tank pressure by stepping on and off the brake

all of these answers are correct

11 / 40

What gauge on the dashboard indicates electrical system charging rate?

The air gauge

The coolant pressure gauge

The ammeter/voltmeter

The power gauge

12 / 40

While driving on a clear night with low beam headlights, you should be able to stop within:

2 lengths of your vehicle.

The distance you will travel in the next 20 seconds.

Half of a football field.

The distance you can see ahead of you.

13 / 40

_____ create a little above 90 degree angle between the adjuster arm and push rod when the brakes are released and no less than 90 degrees when the brakes are applied.

slack adjusters

brake disc

air lines

brake drums

14 / 40

Do empty trucks have the best braking?

yes, but only if the truck is newer than 1998

yes, but only on wet surfaces

yes

15 / 40

Urban mass transit coaches may have a brake and accelerator interlock system. Which of the following statements is true?

The interlock applies the brakes and holds the throttle in idle position when the rear door is open.

All of these answers are correct.

Do not use this safety feature in place of the parking brake.

The interlock releases when you close the rear door.

16 / 40

Is it mandatory that all vehicles with air brakes have low air pressure warning signals?

yes

for small vehicles only

for large vehicles only

17 / 40

Which of the following is NOT a basic step to be taken at a crash scene?

protect the area

care for the injured

notify authorities

gather the contact information of all the drivers involved

18 / 40

What action should you take before driving while drowsy?

drink energy drinks

pull off the road and get some sleep

drink a cup of coffee

open your vehicle windows for some fresh air

19 / 40

Which contains more alcohol: a 12-ounce glass of 5% beer, a 5-ounce glass of 12% wine or a 1 1/2-ounce shot of 80 proof liquor?

12-ounce glass of 5% beer

1 1/2-ounce shot of 80 proof liquor

5-ounce glass of 12% wine

they all contain the same amount of alcohol

20 / 40

Which of the following statements about "Radioactive" labels is true?

Yellow ii indicates the highest level of radioactivity.

Black iii indicates the highest level of radioactivity.

White i indicates the highest level of radioactivity.

Yellow iii indicates the highest level of radioactivity.

21 / 40

Double and triple trailers should be driven with care to avoid a rollover or jacknife.

false

only in ideal conditions

true

only on downgrades

22 / 40

The safety catch for the fifth wheel locking lever must be ____ for a coupling to be complete.

sticking straight up

threaded through the locking lever

above the locking lever

below the locking lever

23 / 40

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

the rig will slide sideways but stay in a straight line

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

there will be a trailer jackknife

nothing will occur

24 / 40

You should___when driving down a long steep hill.

repeatedly pump the brake pedal

release the brake once the vehicle is traveling 5 mph below the safe speed

begin braking once the vehicle is 10 mph above safe speed

use the engine brakes only

25 / 40

What type fire extinguisher is required in the power unit of a placarded vehicle?

A ul rating of 10 b/c or above.

A ul rating of 5 b/c or above.

A ul rating of 15 abc.

Any of these are acceptable.

26 / 40

A portable tank differs from a cargo tank in that ______.

cargo tanks are bulk containers, which are not permanently attached to a vehicle

portable tanks are bulk containers, which are permanently attached to a vehicle

none of these answers are correct

portable tanks are bulk containers, which are not permanently attached to a vehicle

27 / 40

Which of the following statements about the bus interior is false?

The seats must be safe for riders all seats must be securely fastened to the bus.

Never drive with an open emergency exit door or window.

If you use your outside lights, you don't need to turn on red emergency door light.

If there is a red emergency door light, it must work.

28 / 40

You must keep shipping papers describing hazardous materials ______.

within 100 feet of the hazardous materials at all times

in a pouch on the drivers door or in the overhead compartment above the driver’s seat only

with the bills of lading

in a pouch on the driver’s door or in clear view within immediate reach while the seat belt is fastened while driving on the driver’s seat when out of the vehicle

29 / 40

At the end of each shift you should:

Inspect your bus.

All of these answers are correct.

Report any defects.

Report any damage.

30 / 40

This object releases the fifth wheel locking jaw to allow uncoupling.

The locking pins

The apron

The arm bar

The release arm

31 / 40

On a bus, you may sometimes haul small-arms ammunition, emergency shipments of drugs, or hospital supplies. The total weight of all such hazardous materials must not be greater than:

500 pounds

100 pounds

250 pounds

300 pounds

32 / 40

A trailer is at the right height to have the tractor backed up to it when:

the kingpin is about 1 1/5 inches above the fifth wheel

it'll raise slightly when the tractor is backed up under it

the top of the kingpin is even with the bottom of the fifth wheel

the fifth wheel will not come in contact with the kingpin

33 / 40

Air tanks should be drained:

manually when the automatic devices fail

at the end of each shift or day

all of these answers are correct

to prevent sludge from clogginng up the brake system valves

34 / 40

Select whether the following statement is true or false: Front wheel brakes are good to use in all conditions.

false

only in bad weather

true

only in ideal conditions

35 / 40

Under which two special conditions should you downshift?

before entering a curve and before going up a hill

before starting down a hill and before going up a hill

if there is an accident and in sudden heavy rain

before starting down a hill and before entering a curve

36 / 40

You must first______to supply air to the trailer.

turn off the engine so you can hear the brakes

pull out the tractor protection valve

push in the tractor protection valve

cross the air lines to check for the presence of leaks

37 / 40

Suspension systems:

keep the brake drums from failing

keep the load secure

keep the axles in place

keep the steering wheel tight

38 / 40

What kind of surge can occur in a tank with baffles?

Side to side

Bottom to top

All answers listed

Back to front

39 / 40

Which of the following is the proper definition of a cargo tank?

A bulk container which can be securely affixed to a vehicle.

A bulk container not permanently attached to a vehicle.

A bulk container permanently attached to a vehicle.

None of these answers are correct.

40 / 40

At around____the governor allows the air compressor to start pumping again:

225 psi

125 psi

100 psi

175 psi

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