Oregon (OR) CDL manual 2026

Practice the manual, chapter by chapter

State manuals are built on the same national model, chapter for chapter. One thing to know from each chapter, then real questions from it to answer — tap an option to check yourself.

1. 1

   Introduction

   Everyone

   Serious traffic violations include driving a CMV without obtaining a CDL, without having a CDL in the driver's possession, and without the proper class of CDL and/or endorsements.

   What penalty may a court impose for holding more than one license?

   1. AA fine of up to $1,000 and no jail time
   2. BA disqualification of exactly 30 days
   3. CA fine of up to $10,000 and no jail time
   4. DA fine of up to $5,000 or a jail term

   How long do you lose your CDL for two serious traffic violations in a three-year period?

   1. AAt least 30 days
   2. BAt least 60 days
   3. CAt least 120 days
   4. DAt least one year
   This chapter has 26 more questions. Practice them in the app and see your pass chance.
2. 2

   Driving Safely

   Everyone

   A few light taps on the brake pedal, enough to flash the brake lights, should warn following drivers.

   What must be confirmed before you open the engine compartment in Step 2?

   1. AThat the parking brakes are on or wheels chocked
   2. BThat the engine has cooled for ten minutes
   3. CThat the transmission is in its highest gear
   4. DThat the battery has been disconnected

   What should you do about an aggressive driver's gestures?

   1. ARecord them for the incident report
   2. BAcknowledge them so the driver calms down
   3. CReturn them once, to establish a boundary
   4. DIgnore them and refuse to react
   This chapter has 290 more questions. Practice them in the app and see your pass chance.
3. 3

   Transporting Cargo Safely

   Everyone

   Inspect cargo securement within the first 50 miles, then every 150 miles or every 3 hours.

   What do suspension systems carry from the manufacturer, like tires and coupling devices?

   1. AA recommended service interval
   2. BA maximum travel specification
   3. CA weight capacity rating
   4. DA minimum operating temperature

   What does axle weight measure?

   1. AThe weight of the axle assembly itself
   2. BThe weight of the cargo directly above the axle
   3. CThe maximum load the axle is rated to carry
   4. DThe weight one axle or set of axles puts on the ground
   This chapter has 26 more questions. Practice them in the app and see your pass chance.
4. 4

   Transporting Passengers

   P endorsement (bus)

   While driving, scan the interior of your bus as well as the road ahead, to the sides, and to the rear.

   On buses designed to allow standing, how is the standee line marked?

   1. AA painted stripe on the ceiling
   2. BA four-inch line on the floor
   3. CA row of studs across the aisle
   4. DA two-inch line on the floor

   During your pre-trip inspection of a bus interior, which of these items must be in safe working condition before you drive?

   1. AOnboard entertainment screens and charging ports
   2. BHandholds, railings, and rider signaling devices
   3. CPassenger reading lamps and window shades
   4. DAir conditioning vents at every seat row
   This chapter has 98 more questions. Practice them in the app and see your pass chance.
5. 5

   Air Brakes

   Any vehicle with air brakes

   When the brake pedal is released, the s-cam rotates back and a spring pulls the brake shoes away from the drum.

   Besides a red warning light, what device do many air-braked vehicles use to alert the driver to low air pressure?

   1. AA flashing of the exterior headlights
   2. BAn automatic downshift of the transmission
   3. CA vibration built into the brake pedal
   4. DA buzzer that sounds in the cab

   How is the cab control for a front brake limiting valve normally marked?

   1. A"On" and "off"
   2. B"Normal" and "slippery"
   3. C"Loaded" and "empty"
   4. D"City" and "highway"
   This chapter has 148 more questions. Practice them in the app and see your pass chance.
6. 6

   Combination Vehicles

   Class A

   When more cargo is piled up in a truck, the center of gravity moves higher up from the road and the truck becomes easier to turn over.

   After the fifth wheel jaws lock during coupling, how do you confirm the connection with a tug test?

   1. APull forward gently in low gear with the trailer brakes locked
   2. BBack up firmly once more to reseat the kingpin
   3. CShake the release handle while a helper watches the jaws
   4. DRock the trailer sideways using the steering axle

   The trailer wheels lock and the trailer begins to swing around. What is this kind of jackknife called?

   1. AA rearward amplification event
   2. BAn off-tracking skid
   3. CA tractor jackknife
   4. DA trailer jackknife
   This chapter has 118 more questions. Practice them in the app and see your pass chance.
7. 7

   Doubles and Triples

   T endorsement

   Shut-off valves between units in a combination must be open on both lines.

   How does the walkaround inspection of a set of doubles differ from inspecting a tractor with one trailer?

   1. AOnly the converter dolly tires are an extra item
   2. BThere are more tires, lights, reflectors, and coupling points to check
   3. CThe rear trailer can be skipped if it was inspected yesterday
   4. DIt does not differ in any meaningful way

   How should you adjust your driving when pulling doubles in rain or snow?

   1. ASlow down and drive with extra caution
   2. BDrive the same as with a single trailer
   3. CFollow other trucks closely to use their tire tracks
   4. DIncrease speed slightly to keep the trailers pulled taut
   This chapter has 98 more questions. Practice them in the app and see your pass chance.
8. 8

   Tank Vehicles

   N endorsement

   On tank trailers, if your drive wheels or trailer wheels begin to skid, your vehicle may jackknife.

   Compared with most other kinds of cargo, why does a load of liquid in a tank make a truck easier to roll over?

   1. ALiquid cargo gradually lowers the air pressure in the tires
   2. BMuch of the load's weight is carried high above the roadway
   3. CLiquid loads are always heavier than dry freight loads
   4. DTank trailers ride on narrower axles than flatbed trailers

   Besides leaks, what condition of the tank's body or shell does the inspection cover?

   1. ACondensation on the upper surface
   2. BDents
   3. CChalk marks left by the loading rack
   4. DFading of the painted shipping name
   This chapter has 62 more questions. Practice them in the app and see your pass chance.
9. 9

   Hazardous Materials

   H endorsement

   When stopped, law enforcement officers may check your shipping papers, vehicle placards, the hazardous materials endorsement on your driver license, and your knowledge of hazardous materials.

   Which division number covers explosives with a mass explosion hazard?

   1. ADivision 1.5
   2. BDivision 1.1
   3. CDivision 1.3
   4. DDivision 1.6

   Which classes may not be carried as overhang or tailgate loads?

   1. AClasses 1, 4, and 5
   2. BClasses 2.2, 6.2, and ORM-D
   3. CClasses 2, 3, and 6
   4. DClasses 7, 8, and 9
   This chapter has 234 more questions. Practice them in the app and see your pass chance.
10. 10

    School Buses

    S endorsement

    Drivers of ABS-equipped buses should brake normally with steady pedal pressure and let the system prevent lockup.

    While a school bus is being driven on its route, what is the rule for the emergency exit doors?

    1. AThey must be securely closed whenever the bus is being operated
    2. BThey only need to be closed when students are actually on board
    3. CThey may stay open whenever an adult monitor rides in the back
    4. DThey may be latched half-open to help cool the bus in hot weather

    What does a sign mounted below the cross-buck tell you?

    1. AThe speed limit for crossing the tracks
    2. BThe number of tracks at the crossing
    3. CThe name of the railroad operating the line
    4. DThe distance to the next crossing
    This chapter has 98 more questions. Practice them in the app and see your pass chance.
11. 11

    Pre-Trip Vehicle Inspection

    Everyone (skills test)

    The brake pedal should not move or depress after initial application and should be firm and have a sufficient amount of reserve for brake pedal application.

    What must be true of the light lenses on the front of the vehicle?

    1. ATinted to reduce glare for oncoming drivers
    2. BSealed with silicone around every edge
    3. CProper color, clean, not broken and not missing
    4. DReplaced whenever the bulb is changed

    What is the consequence of performing the hydraulic brake check incorrectly on the inspection test?

    1. AA point deduction from the total score
    2. BA warning noted on the score sheet
    3. CAn automatic failure of the test
    4. DA required retest of that item only
    This chapter has 200 more questions. Practice them in the app and see your pass chance.

The official Oregon CDL manual