Maine Passenger CDL Practice Test

This is a free 20-question practice test for the Passenger portion of the Maine Commercial Driver's License knowledge exam. Questions are pulled from a pool of 58 drawn from the AAMVA CDL Manual, which is the source document the Maine Bureau of Motor Vehicles uses to write its actual exam.

How it works: Click an answer. The correct choice highlights in green, and you'll see a short explanation. Aim for 85% or better before you sit for the real test in Maine.

Question 1 of 20

A bus driver in heavy fog should:

Reduce speed substantially, use low beams, avoid sudden stops
Speed up to clear it
Use high beams
Tailgate

Correct. Same fog rules as any vehicle: low beams, slow speed, gentle inputs, four-way flashers if moving slowly.

Question 2 of 20

Where must hazardous materials that are allowed on a bus be carried?

Inside the passenger area
Only in the baggage compartment, never in the passenger area
On the dashboard
In the cab with the driver

Correct. When allowed at all, the small quantities of hazmat permitted on buses must be in the baggage compartment, separated from passengers.

Question 3 of 20

A bus driver may carry, in the baggage compartment, certain hazardous materials in small quantities except:

Class 1 explosives (other than small arms), Division 6.1 PIH, Class 7 radioactives above limited quantities, and tear gas
Letters and parcels
Personal luggage
Driver's tools

Correct. Strict prohibitions for buses include Class 1 explosives (other than small-arms ammunition), Division 6.1 PIH, most Class 7 radioactives, and tear gas.

Question 4 of 20

Crowd control during boarding:

Manage the line, watch for fare evaders if applicable, ensure passengers are inside before closing the door
Push them aboard
Skip fare collection
Allow boarding while moving

Correct. Boarding is a controlled process. Manage the line, watch for safe fare collection, ensure all passengers are aboard before closing the door.

Question 5 of 20

Brake retarders or "Jake" brakes on a bus:

Help control speed on long downgrades; some are noisy and locally regulated
Are illegal everywhere
Replace the foot valve
Are decorative

Correct. Engine brakes / retarders help slow the rig on downgrades. Some areas regulate noise from compression brakes.

Question 6 of 20

Buses must stop at every railroad crossing:

Yes, with limited exceptions (industrial switching tracks in city traffic, abandoned tracks, streetcar tracks)
No, never
Only at night
Only if a train is in sight

Correct. Buses, school buses, and placarded hazmat vehicles must stop at every railroad crossing 15 to 50 feet from the nearest rail, with narrow exceptions.

Question 7 of 20

On a bus with a wheelchair lift, you should:

Verify the lift is operating and stowed correctly during pre-trip
Ignore it
Operate it only after passengers complain
Skip the lift

Correct. Test lift operation during pre-trip; verify it stows correctly so it does not interfere with door operation or hit cars during the route.

Question 8 of 20

Speed control on a long downgrade in a bus is critical because:

Brake fade can occur, and braking distance grows quickly with passenger load
Speed is irrelevant
Buses cannot go downhill
Speed is the same as a car

Correct. Heavy passenger load + long downgrade = brake fade risk. Select a lower gear before starting down and use intermittent firm braking.

Question 9 of 20

You discover an emergency exit that does not function. You should:

Carry passengers anyway
Place the bus out of service until the exit is repaired
Tape it shut
Ignore it

Correct. A non-functional emergency exit puts passengers at risk. The bus is out of service until repaired.

Question 10 of 20

Passenger areas on the bus must:

Be free of obstructions, with clear access to emergency exits
Be packed full
Have blocked exits
Have loose cargo

Correct. Aisles and exits must remain clear during travel. Cargo or carry-on must not block these paths.

Question 11 of 20

You should report any safety concerns about the bus:

Immediately to the carrier — never delay
Only at the end of the day
Only weekly
Never

Correct. Report safety issues immediately. Document with the daily driver vehicle inspection report (DVIR).

Question 12 of 20

When fueling a bus:

Generally without passengers aboard; follow carrier policy if passengers must remain
Always with passengers
Always with smokers
Only at high speed

Correct. Most carriers require passengers to deboard during fueling for safety. Follow company policy.

Question 13 of 20

Looking out for passengers boarding through the front door:

Watch for elderly, mobility-limited passengers and those with strollers; offer the kneeling feature if equipped
Rush them
Only watch for adults
Ignore them

Correct. Use the kneeling mechanism, lift, or ramp as needed. Allow time for safe boarding.

Question 14 of 20

Most bus injuries during a trip happen because of:

Driver hitting another vehicle
Sudden stops, sharp turns, and quick lane changes throwing passengers
Engine failure
Fuel issues

Correct. Standing or unbelted passengers are vulnerable to abrupt motion. Smooth driving prevents most in-bus injuries.

Question 15 of 20

When discharging passengers in a heavy traffic area:

Choose a safe stop where passengers can step to a sidewalk or safe area; never discharge into traffic
Stop in any lane
Stop suddenly
Have passengers jump

Correct. Always discharge to a safe pedestrian area. Never to a travel lane or unsafe shoulder.

Question 16 of 20

A passenger vehicle drove with people standing forward of the standee line. This is:

Acceptable
Prohibited — standees may not be forward of the line while the vehicle is in motion
Required
Encouraged

Correct. Standees forward of the line are at risk in emergency stops or sudden braking. Enforce the line.

Question 17 of 20

A bus driver who picks up a passenger between scheduled stops:

Is permitted in all cases
Must follow the carrier's policy and applicable regulations — many companies prohibit unscheduled pickups
Should always accept
Should always refuse

Correct. Carrier policy and regulations govern unscheduled stops. Most companies prohibit them for safety and liability reasons.

Question 18 of 20

Driver fatigue on a bus operation:

Is a major cause of bus crashes; HOS rules apply, plus carrier policies
Is no concern
Affects only night drivers
Is the same as a car driver

Correct. Bus operators have demanding schedules. HOS rules and carrier policy combine to manage fatigue. Sleep before driving.

Question 19 of 20

When you stop a bus, you should:

Stop smoothly to avoid throwing standing passengers off-balance
Stop suddenly
Use only the parking brake
Stop on a hill always

Correct. Smooth stops protect standing passengers and reduce surge for seated ones. Plan stops in advance.

Question 20 of 20

On highway travel:

Maintain steady speed, avoid abrupt lane changes, signal early
Accelerate hard
Tailgate
Lane-weave to make time

Correct. Smooth, predictable driving keeps passengers comfortable and safe.

About the Maine Passenger exam

Most states administer 20 Passenger questions and require 80% to pass. The exam covers passenger safety, vehicle inspection, loading and unloading, prohibited cargo, emergency exits, and conduct expected of a passenger-vehicle operator. A separate skills test in a representative passenger vehicle is also required.

The Maine Bureau of Motor Vehicles follows the federal CDL standards established by FMCSA. To earn the Passenger credential, you must answer at least 80% of the questions correctly. Many candidates score lower the first time because the test pulls from a large pool — refreshing this page will give you a different mix of questions, drawn from the same authoritative source.

Want more practice? Try the full Passenger question bank or browse all Maine CDL practice tests.