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

Alcohol evaporators in some air brake systems help to:

decrease the chances of ice in the air brake valves in cold weather

it removes fuel from the air lines

decreases the risk of water in the air brake valves in cold weather

cleans out oil from the air lines

2 / 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:

100 pounds

300 pounds

500 pounds

250 pounds

3 / 40

The baffles in a tank trailer help to control:

The overall weight of the vehicle.

The flow of liquid side to side.

The distrubition of weight.

The movement of liquid from front to back.

4 / 40

Select the true statement in regards to brake drums or discs:

they are not allowed to have any cracks

they should always be kept well-greased up

they should not have cracks that are longer than half the width of the friction area

the linings should fit loosely around the brake shoe

5 / 40

What color are all school buses painted?

National school bus yellow.

Orange yellow.

Florescent yellow.

The individual district decides the exact color.

6 / 40

What is the safest way to stop unruly behavior on the bus?

Have the unruly students move to the front of the bus.

Yell loudly for the students to sit down and behave themselves.

Keep checking the rear view mirror so you can see what happened and report to the principal.

Pull off the road in a safe location, secure the bus, stand up, and tell the students what behavior you expect of them.

7 / 40

Air tanks need to be drained:

to keep the tanks warm when not in use

to prevent water and oil from building up in the tank

air tanks should absolutely never be drained

to keep the tanks cold when not in use

8 / 40

Some city transit buses may have a brake-door interlock system, this system:

Should be used in emergencies.

Should be used in place of the parking brake.

Works when the rear door is open.

Releases the brakes.

9 / 40

A tractor should not be backed under a trailer until the whole air system is:

at a level of 50 and 70 psi

at a normal pressure

at a level of 70 and 90 psi

at half of its normal pressure

10 / 40

You are driving a 60 foot truck at 55 MPH, how much space (in seconds) should you keep in front of you?

7 seconds

5 seconds

8 seconds

6 seconds

11 / 40

The bus driver must accept responsibility for supervising and controlling students while on the bus route. Who is the person in charge?

The school district superintendent.

Parents of the students on the bus.

Students on the bus.

Bus driver.

12 / 40

The best way to test the low air pressure warning signal is to:

apply pressure on and off the brakes while the engine is running

apply pressure on and off the brake pedal with the engine off to drop the air pressure to below 60 psi

apply pressure on and off the brake pedal until the air pressure drops below 20 psi

manually release the air out of your brakes to see if the signal activates

13 / 40

What are the three hazard classes should NOT be loaded into a trailer that has a heater air conditioner unit?

Class 2 explosives, class 3 flammable solids, and division 21 inhalation hazard.

Class 1 explosives, class 8 corrosives, and division 5 oxidizers.

Class 1 explosives, class 3 flammable liquids, and division 21 flammable gas.

None of these answers are correct.

14 / 40

Upon what does the amount of liquid you can carry in a load depend?

All of the answers listed.

The legal weight limits.

The amount of expansion that will occur.

The weight of it.

15 / 40

The pintle hook should be_____ and the converter dolly air tank drain valve is___when doing a walk around inspection of a triple or double trailer.

latched, open

latched, closed

free, open

free, closed

16 / 40

How far away are you required to park from a bridge, tunnel, or building if you are carrying Division 1.2 or 1.3 materials?

At least 500 feet

At least 600 feet

At least 300 feet

At least 400 feet

17 / 40

Select the true statement in regards to if a glad hand on the blue air line is missing a seal.

there may be a service line air leak

you should remove one from the red air line to use as a temporary replacement

there may be an emergency line air leak

it is not a big problem

18 / 40

Which seats not securely fastened to the bus are usually allowed?

Any of the last row seats.

Window seats.

The driver's seat only.

None of these answers are correct.

19 / 40

You should place the starter switch key into your pocket while you are performing the pre-trip inspection because:

it could damage the starting mechanism

all of these answers are correct

someone could steal the truck

someone could start and move the truck

20 / 40

A disruptive passenger:

May be thrown off the bus.

Is not your responsibility.

Should not be allowed on the bus.

Should not be discharged where it would be unsafe for them.

21 / 40

When inspecting the_____you pump the pedals 3 times and then hold it down for 5 seconds feeling for no movement to occur.

all answers listed

hydraulic brakes

engine brakes

emergency brakes

22 / 40

Which of the following statements about special danger of loading and unloading is true?

Students should be told not to use the handrails when exiting the bus due to the possibility of causing a clothing hang up.

Students should be told to leave any dropped objects and move to the point of safety out of danger and get the driver's attention to retrieve the object.

Students should be told to pick up any dropped objects as long as it is not under the bus.

Students should be told to remain seated while the bus is in motion.

23 / 40

When must a driver’s inspection report be completed?

Before driving your bus.

All of these answers are correct.

Only if defects are found.

At the end of each shift.

24 / 40

Which of the following is a key steering component?

bearing plate

leaf spring

torque rod

gear box

25 / 40

What is most likely to occur when the front wheels begin to skid?

You will continue heading in a straight line and moving forward no matter what direction you turn the steering wheel.

A roll over will occur.

The power of the surge will disconnect the tank from the truck.

All answers listed.

26 / 40

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

use wheel chocks only

none of the answers listed

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

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

27 / 40

Liquid surge affects the handling of a tanker by:

Allowing you to stop faster.

Moving the truck in the direction of liquid flow.

Allowing you to take tighter turns.

Decreasing the wind drag.

28 / 40

When there is a hazardous materials emergency. You should:

All of these answers are correct.

Prevent smoking and keep open flames away.

Keep people away and warn them of the danger.

Contact emergency authorities.

29 / 40

Do not tow or push a disabled bus with riders aboard the vehicle, unless:

Your employer tells you to.

Getting off the bus would be unsafe.

You are also a class a tow truck driver.

Bus is on a drawbridge.

30 / 40

There should be ___space between the upper and lower fifth wheel after coupling.

1/8 inch

none of the answers listed

1/30 inch

1/12 inch

31 / 40

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

The locking pins

The arm bar

The release arm

The apron

32 / 40

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

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

none of these answers are correct

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

33 / 40

Which of the following statements is FALSE:

Avoid fueling your bus with riders on board unless absolutely necessary. never refuel in a closed building with riders on board.

Do not tow or push a disabled bus with riders aboard either vehicle, unless getting off the bus would be unsafe.

Do not transport intoxicated passengers.

Do not talk with riders or engage in any other distracting activity while driving.

34 / 40

What is the brake system that applies and releases the brakes when the brake pedal is used?

none of the answers listed

service brake system

engine brake system

lock brake system

35 / 40

Your bus starts to lean toward the outside on a banked curve, you are:

Driving on a wet surface.

Driving in the mountains.

Driving too fast.

Driving with bad tires.

36 / 40

If you are carrying Division 1.2 or 1.3 materials, how far away must you park from the traveled portion of the roadway?

At least half a mile

At least twenty feet

At least ten feet

At least five feet

37 / 40

When transporting both hazardous and non hazardous materials, your bills must:

Identify the materials by the letter x or rq in the hm column.

Describe the hazardous materials first.

Any one of the above.

Have the hazardous materials highlighted.

38 / 40

The manual says you should look _____ ahead while driving.

15 to 20 seconds, at highway speeds, about a half of a mile

5 to 8 seconds, at highway speeds, about an eighth of a mile

9 to 12 seconds, at highway speeds, about a quarter of a mile

12 to 15 seconds, at highway speeds, about a quarter of a mile

39 / 40

A baffled tanker has:

Bulkheads with holes that allow liquid to flow through it.

No side to side surge.

Balls floating in it to increase the speed of the liquid movement.

Separate compartments inside the trailer.

40 / 40

A safe haven is ______.

an approved place for parking unattended vehicles loaded with radioactive materials

an approved place for parking unattended vehicles loaded with corrosive materials

an approved place for parking attended vehicles loaded with flammable materials

an approved place for parking unattended vehicles loaded with explosive materials

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