maryland
CDL Practice Test

Welcome to the Maryland CDL practice test site. Questions on these practice tests are similar to those that are found on the Maryland CDL test and presented by the MVA. Use these practice test questions as you prepare to obtain a Maryland CDL. These tests are free and you may take them as many times as you would like. 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

In what position should the converter dolly air tank drain valves and pintle hook be in?

closed and latched

closed and open

open and open

open and latched

2 / 40

What position should the tractor protection control valve be in after coupling?

lowered

normal

raised

mid position

3 / 40

Select the true statement in regards to the braking power of spring brakes.

braking power can only be tested by licensed mechanics

it will not be affect by the condition of the service brakes

the braking prower increases when the brakes are hot

it depends on the adjustment of the service brakes

4 / 40

The locking jaws of the kingpin should close around:

the base

the apex

the shank

the tip

5 / 40

Which of the following types of cargo must never be carried on a bus with passengers?

Small arms ammunition (orm-d)

Emergency drug shipments

Tear gas

Emergency hospital supplies

6 / 40

A placarded vehicle must carry what type of fire extinguisher?

One with a rating of 5 b/c minimum.

One with a rating of 10 a/b minimum.

One with a rating of 5 a/b minimum.

One with a rating of 10 b/c minimum.

7 / 40

Air pressure loss in a vehicle with a fully charged air system should be less than_______after the initial drop and brake applied.

1 psi a minute

3 psi a minute

none of the answers listed

4 psi a minute

8 / 40

Select the reason as to why you should not use the trailer hand valve while driving.

it should not be used on dry roads due to road conditions

it could cause the trailer to skid

the trailer brakes will not be evenly applied

it releases too much air from the system

9 / 40

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

use the trailer brakes only

do stab or controlled braking

slam down the brake pedal and keep pressure on it

none of the answers listed

10 / 40

How should the hand valve be used?

to test the trailer brakes

when the trailer is fully loaded down

only in conjuction with the foot brake

only in emergency situations

11 / 40

How should the pintle hook be when backing a dolly under the second trailer?

in a halfway open position

in the latched position

in the unlatched position

removed from the dolly

12 / 40

When inspecting the ______you are making sure that the lines and hoses are not chafed, cut, pinched, or dragged against tractor parts.

air brake lines

lifts/door/ties

mud flaps

electric/air lines

13 / 40

You should check that the following makes an audible noise:

Engine brakes

Air leaks

Electric or air horn

Radio system

14 / 40

Why is understanding the loading and unloading procedures so critical?

Because many students are killed while getting on and off a school bus each year.

Because only high school students understand how to cross the road.

Because motorists ignore students walking to school.

Because school district officials have the authority to conduct surprise quizzes and you must know the correct answers to keep your job.

15 / 40

Should your air compressor stop working:

you will lose your ability to brake immediately

the brakes will lock up on you immediately

there will still be air pressure left in the air tanks

there will be no affect to your brakes

16 / 40

This should have no illegal stickers, dirt, obstructions, or damage to the glass.

The rearview mirror

Mirrors and windshield

None of the answers listed

The headlights

17 / 40

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

none of these answers are correct

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

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

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

18 / 40

When should you check your mirrors for a lane change?

After completing the lane change.

Before and after signaling the change.

All of these answers are correct.

Right after starting the lane change.

19 / 40

Which of the following is a necessary qualification for non-bulk packaging?

All of these answers are necessary qualifications.

Maximum net mass of 400 kg, or less than 450 l if used as a receptacle for a solid.

A maximum capacity of 450 l or less if it is used as a receptacle for liquids.

Maximum water capacity of 454 kg or less if used as a receptacle for gases.

20 / 40

What is a king pin?

it is a pin that locks the air brake lines together

it is a pin that locks the trailer to the tractor on the fifth wheel

it is a pin that holds the wheel on to the axles

it is a pin that a driver receives for being a safe driver

21 / 40

What product is typically carried in a liquid tank trailer without baffles?

Food or milk products.

Fertilizer.

Hydrogen peroxide.

Fuel.

22 / 40

With the engine cut off and the brakes released the air loss in a straight truck or bus should not be more than:

2 psi in a minute

3 psi in a minute

4 psi in a minute

5 psi in a minute

23 / 40

What are the liquid tight separations between compartments inside tanks called?

Bulkheads

None of the answers listed

Waffles

Layers

24 / 40

What does the service brake system do?

under normal driving it applies and releases the brakes by using the brake pedal

they are only on vehicles that have hydraulic brakes

they are part of an official vehicle inspection

they are valves that maintain air tank pressure

25 / 40

Puddles or dripping fluids from the underside of the transmission and engine may indicate:

All of these answers are correct

Problems with the water pump

A leak from the engine

A leaking line or hose

26 / 40

If there is not a sight glass to check the oil level you are required to look for leaks around the _____.

brake pads

transmission

axle seals/hub oil

wheel rims

27 / 40

How should the hand valve be used?

only when the trailer is loaded to its maximum weight

only when accompanied by the foot brake

to test the trailer brakes

only when accompanied by the service brakes

28 / 40

What does the air compressor governor control?

when air is pumped into the air tanks

when the air is taken out of the hoses

when the valve system releases pressure

when air pressure is applied to the brakes

29 / 40

A tank trailer should never be fully loaded due to:

The liquid can expand causing a leak from the trailer.

The will be more shifting of the load.

The baffles aren't as effective.

The movement is stronger.

30 / 40

When accelerating:

do not engage the clutch before you take your foot off the brake

always use the parking brake to slow down

speed up smoothly and gradually and avoid jerking

"hammer down" when your wheels start to spin

31 / 40

You should back up slowly until____when coupling the trailer.

the tractor comes in contact with the front of the trailer

the cargo inside the trailer shifts

the fifth wheel has just touched the trailer

the rear wheels are visible in the mirror

32 / 40

There are 2 reasons as to why hauling liquids take special care. One reason is the ___center of gravity.

high

low

narrow

long

33 / 40

If students must cross the street, when they get off the bus, which statement is true?

If the bus is equipped with the crossing gate, the danger of running over the child is eliminated.

The student should wait to cross the street until the bus continues on its route.

When the driver signals that it is safe to proceed, the students must run across the street to reduce the exposure to danger.

For crossing, students should make eye contact with the bus driver and wait for the driver's signal that it is safe to proceed.

34 / 40

Anti-lock brakes:

Keep your wheels from locking during hard brake application.

Work only when you activate in-cab switch.

Are not available in mosst busses.

Lengthen stopping distance.

35 / 40

What is the benefit of ABS?

all of these answers are correct

it prevents the wheels from locking up during heavy braking or slippery conditions

it decreases your stopping distance

it provides an added layer of safety for truck drivers

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

visually check that they are level height wise

37 / 40

What is the normal operating range for a truck's oil pressure?

20-30 psi

40-60 psi

This is engine-specific

30-75 psi

38 / 40

When transporting hazardous waste, you must:

Sign a uniform hazardous waste manifest.

Have the word "waste" before the name of the material on the bills.

Carry a uniform hazardous waste manifest in the truck.

All of these answers are correct.

39 / 40

Which of the following is a key steering component?

torque rod

gear box

leaf spring

bearing plate

40 / 40

Select the answer that is controlled by the foot brake.

the emergency brake

the shut off valves

the service air line

the engine brake

Your score is

The average score is 0%

5/5 - (2 votes)

CDL Category Practice Tests

CDL Practice Test

How To Get A maryland Commercial Drivers License

Applicants can apply for any CDL and necessary endorsements when they are 21 years of age or older. Applicants may apply for a restricted CDL at the age of 18 years old. This restricted CDL limits the driver to intrastate driving and doesn’t allow HazMat Certification, driving double or triple trailers, or driving school buses with children on board. All applicants must possess a current DOT medical card to be considered for their CDL.

All drivers that have the following issues are considered disqualified from receiving their Maryland CDL.

Having a current license suspended, revoked, denied, or canceled.
Possessing more than one state driver’s license.
Having restricted CDL driving privileges in another state.
Being convicted of driving impaired within 24 months prior to submitting a CDL application.

All applicants must successfully pass both a skills test and a knowledge test in order to receive their Maryland CDL. To receive specific endorsements, individuals must pass examinations about the endorsement as well.

Endorsements
X – Tank and Hazmat Endorsement
H – Hazardous Materials
N – Tank Vehicles
P – Passenger Vehicles
T – Double / Triple Trailers

Hit the Open Road

maryland CDL License Test Tips

Knowledge tests are required to receive Class A, B, and C CDLs and endorsements. All applicants must take a 50 question test and pass with a score of 40 or higher to receive their CDL permit. Those applying for a Class A license must take a 70 question test, with 20 of the questions pertaining directly to combination vehicles. All endorsements require their own specific examination that has been 20 and 30 questions. All assessments must be passed with a score of 80 or higher.

Each applicant is required to complete a three-section skills assessment. This assessment is comprised of a vehicle inspection, driving test, and basic control test. To pass the skills portion of the CDL assessment, applicants must successfully show their knowledge in all three areas. Those seeking vehicle-specific endorsements must take the skills test in that specific type of vehicle they want the endorsement for.

Additional Information

Information on the Maryland Motor Vehicle Administration

The Maryland Motor Vehicle Administration provides the oversight and administration of CDL requirements in Maryland. To get more information contact them via:

Website: http://www.mva.maryland.gov/drivers/apply/cdl/commercial.htm

Phone: 410.424.3011

Additional Maryland CDL Helpful Links

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

maryland CDL Practice Test