idaho
CDL Practice Test

Idaho! 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. Good luck!

1 / 40

Select which is not an engine compartement belt:

A water pump belt

A safety belt

An air compressor belt

A power steering belt

2 / 40

What will occur as a result of failing to perform all 3 components of the air brake check?

The driver must restart the pre-trip from the beginning.

An automatic failure of the vehicle inspection test.

A deduction of 15 points.

None of the answers listed.

3 / 40

The object that doesn't get checked at the side of the trailer is the:

The landing gear

The locking pins/tandem release arm

The frame

Electrical/air connections

4 / 40

Select the factor that has no effect on how much liquid you can carry:

The legal amount of weight you can carry of any particular liquid.

The liquid's weight.

How much the liquid will expand in transport.

The density of the liquid.

5 / 40

This object should not have any missing parts, be fully raised, the crank handle is secured, and that there is no damage to the frame.

Landing gear

Release arm

Lifts/doors/tires

Drop arm

6 / 40

Which of the following is something the driver must watch for:

All of these answers are correct.

Appropriate clearance around and over the bus.

Poles and tree limbs at stops.

Gaps your bus needs to accelerate and merge with traffic.

7 / 40

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

The high center of gravity.

The distrubition of weight.

All answers listed.

The level of the fluid.

8 / 40

Wet brakes can cause _____.

all of these answers are correct

pulling to one side or the other

lack of braking power

brakes to apply unevenly

9 / 40

When checking the wheelchair lift, the things you should look for are:

Leaking, damaged, or missing parts and that the lift is fully retracted and latched.

Stripped screw drive linkages and fluid drips.

Bent or dinged lift floor.

Leaking, damaged, or missing wheelchairs.

10 / 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.

brake disc

air lines

brake drums

slack adjusters

11 / 40

Where are shut-off valves located?

at the front of the trailer

either at the front or the back of the trailer

at the front and back of the trailer

at the back of the trailer

12 / 40

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

Side to side

Bottom to top

All answers listed

Back to front

13 / 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 10 b/c minimum.

One with a rating of 5 a/b minimum.

14 / 40

Select the part that is not a part of the drum brake:

safety valve

slack adjuster

axle

brake drum

15 / 40

Select the true statement in regards to handing triples and doubles

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

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

none of the answers listed

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

16 / 40

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

50 psi

60 psi

80 psi

30 psi

17 / 40

When conducting a pre-trip inspection, the most important item to verify is _____.

that the radio transmits a signal

that there are no leaks in the air brake system

that the tire tread is sufficient for the expected driving conditions

that the registration is in the cup holder

18 / 40

What are the three types of emergency equipment that you must have with your vehicle?

first aid kit, fire extinguisher, flares

fire extinguisher, spare electrical fuses, warning devices for parked vehicles

none of these answers are correct

warning devices for parked vehicles, first aid kit, flares

19 / 40

Select the statement that is true in regards to quick steering movements and triple/double trailers:

it is easier to countersteer compared to other vehicles

they flip over due to quick steering movements a lot easier than other vehicles

as you perform quick steering movements you should apply pressure to the brake pedal

there are no issues that occur from quick steering

20 / 40

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

The surge will be slower than a tank without 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.

There is no difference in handling when you have baffles.

21 / 40

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

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

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

All of these answers are correct.

The interlock releases when you close the rear door.

22 / 40

How do you release the dolly brakes when coupling twin trailers?

by charging the air line

by opening the shut off valve

by opening the air tank petcock

by flushing the brake line

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

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

Because motorists ignore students walking to school.

24 / 40

An emergency escape ramp should be used _____.

only in ideal conditions

only when not carrying a load

only when it is raining

any time the truck experiences a significant loss of braking power

25 / 40

The purpose for the emergency air line is:

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

none of the answers listed

to supply air to the trailer 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

26 / 40

A drawbridge does not have a traffic light showing green or a traffic control attendant. How many feet before the draw of a bridge must a bus driver stop?

At least 50 feet.

At least 100 feet.

At least 25 feet.

At least 75 feet.

27 / 40

Select the accurate statement in regards to rolling up the landing gear to complete the coupling process.

you should use a low gear until the tractor is supporting the trailer

you should leave the landing gear at the half way mark to make the uncoupling process easier later

you should grease the landing gear the increase the speed of the process

you should use a high gear to make the process faster

28 / 40

Who is responsible for packaging, labeling, and preparing the hazardous material shipping papers for a common carrier?

The carrier

Your spouse

The shipper

The driver

29 / 40

How do you secure a second trailer to your combination vehicle?

use wheel chocks only

use emergency air brakes, spring brakes, and wheel chocks together

none of the answers listed

use the emergency air brakes or the trailer's spring brakes only

30 / 40

If you are transporting cargo, you should inspect the cargo and securing devices:

during every driving brake on the trip

within the first 50 miles of driving

before the trip, within 50 miles after beginning the trip, and at least every 150 miles or 3 hours

before the trip

31 / 40

Do empty trucks have the best braking?

yes

yes, but only on wet surfaces

yes, but only if the truck is newer than 1998

32 / 40

If your bus has an emergency exit door, it must:

All of these answers are correct.

Have a red electric door light turned on at all times.

Not have any signs, stickers, or markings anywhere near it.

Be closed when operating the bus.

33 / 40

You should back up slowly until____when coupling the trailer.

the cargo inside the trailer shifts

the tractor comes in contact with the front of the trailer

the fifth wheel has just touched the trailer

the rear wheels are visible in the mirror

34 / 40

Which seats must have a seat belt:

All of these answers are correct.

The driver's seat.

Senior citizen seats.

Women and children seats.

35 / 40

The Emergency Response Guidebook (ERG):

All of these answers are correct.

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.

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

36 / 40

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

all answers listed

the center of the kingpin is past the locking jaw

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

the kingpin is over the fifth wheel

37 / 40

Do you need to stop before a railroad crossing if you are hauling 100 pounds of Division 4.3 materials?

Only if the arm is down telling vehicles to stop

Impossible to tell without more information

Yes

38 / 40

The minimum tread depth for tires other than the front tires is ____.

4/32

2/32

3/32

1/32

39 / 40

How should you know when to shift?

engine speed and the shift indicator light

engine speed and road speed

every 3 to 5 seconds or engine speed

road speed and wind speed

40 / 40

In what location must you keep your shipping papers which describe any hazardous materials?

In a fire-safe pouch under the driver's seat that you can reach while you are driving.

On the driver's seat anytime you are outside of the vehicle.

In a fire-safe pouch under the passenger seat while you are driving.

In a locked glove compartment anytime you are outside of the vehicle.

Your score is

The average score is 0%

5/5 - (2 votes)

CDL Category Practice Tests

CDL Practice Test

How To Get A idaho Commercial Drivers License

Applicants can be age 18 or older when applying for their CDL. Those under the age of 21 are not eligible for the Hazmat or Doubles/Triples Endorsement. All applicants must get a DOT medical card to shows their ability to be physically able to drive a commercial motor vehicle.

Any drivers that fall into the following categories are disqualified from receiving their CDL:

Having more than one driver’s license.
Being convicted of an impaired driving offense in a commercial vehicle within the prior 24 months to submitting the CDL application.
Current suspended, revoked, denied, or canceled driver’s license.
Having CDL disqualifications in other states.

All applicants are required to complete a practical skills test and knowledge test in order to receive their CDL. Adding endorsements to a CDL will require additional knowledge tests and practical skills tests.

Endorsements
T – Doubles / Triples
P – Passenger
N – Tank Vehicles
H – Hazardous Materials
X – Tank Vehicle That Carries Hazardous Materials

Hit the Open Road

idaho CDL License Test Tips

Applicants for an Idaho CDL must complete a written knowledge test to showcase their retention of the commercial driving laws. Class A drivers are required to take a 70 question assessment that includes 20 questions specifically about combination vehicles. Class B and C applicants are required to pass a 50 question assessment. Those seeking endorsements and removal of the Air Brake Restriction must take additional tests that range between 20 and 30 questions. All tests must be passed with a score of 80 percent or better.

CDL applicants are required to pass a three-part skills test. These parts include a driving test, basic control skills test, and vehicle inspection test. This can be completed at an Idaho State Driving Facility or other approved testing site.

Additional Information

Information on the Idaho Transportation Department

The Idaho Transportation Department administers the CDL requirements and testing in Idaho. To get more information contact them via:

Website: https://trucking.idaho.gov/commercial-drivers-license-cdl/

Phone: 208.334.8000

Additional Idaho CDL Helpful Links

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

idaho CDL Practice Test

CDL Category Practice Tests

CDL Practice Test

How To Get A idaho Commercial Drivers License

Hit the Open Road

idaho CDL License Test Tips

Additional Information

Information on the Idaho Transportation Department

Additional Idaho CDL Helpful Links

idaho
CDL Practice Test