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

Play of the steering wheel should not exceed:

10 degrees

15 degrees

5 degrees

30 degrees

2 / 40

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

engine brake system

service brake system

none of the answers listed

lock brake system

3 / 40

Is it mandatory that all vehicles with air brakes have low air pressure warning signals?

for large vehicles only

for small vehicles only

yes

4 / 40

An example of a low pressure warning signal for air brakes is:

a wig wag mechanical arm

all of these answers are correct

red light

a buzzer

5 / 40

Hazardous materials (that are not forbidden) carried on a bus must be:

Labeled

All of these answers are correct

Stored in the passenger compartment

Carried in a metal box

6 / 40

______is a device that connects the service and emergency air lines between the tractor and trailer.

Top off valves

Glad hands

Service lines

Relay knife

7 / 40

Which of the following statements about overhead space is true?

an empty van is lower than a loaded one

athe heights posted at bridges are usually accurate

warning lights are always installed on low bridges and overpasses

the weight of the cargo changes a truck's height

8 / 40

Which of the following statements about bus evacuation is true?

If time allows, notify the police.

If time allows, backup to the stop before evacuating the bus.

If time allows, walk through the bus and close all windows.

If time allows, notify the dispatcher about evacuation location, conditions, and type of assistance needed.

9 / 40

What position should the heaviest trailer be in when pulling 3 trailers?

in the back

in the front

in the middle

it makes no difference

10 / 40

The air leakage rate for a combination vehicle should not exceed ____psi a minute.

11 / 40

Which of the following statements about the bus interior is false?

If there is a red emergency door light, it must work.

The seats must be safe for riders all seats must be securely fastened to the bus.

Never drive with an open emergency exit door or window.

If you use your outside lights, you don't need to turn on red emergency door light.

12 / 40

Which of the following statements about overhead space is true?

an empty van is lower than a loaded one

the weight of the cargo changes a truck's height

warning lights are always installed on low bridges and overpasses

the heights posted at bridges are usually accurate

13 / 40

The two other places where the hazardous identification number must appear are:

Any bulk packaging and the cargo tanks.

On the back of the truck and inside the glove compartment.

On a temporary license plate holder and the steering wheel.

On the gas tank and a sticker in the glove compartment.

14 / 40

A commercial motor vehicle (CMV) is defined as:

all of these answers are correct

a vehicle transporting 16 or more passengers

a vehicle transporting hazardous materials

a vehicle with a gross weight over 26,001 lbs

15 / 40

One reason hauling liquids in tank vehciles require special care is:

Because of uneven expansion.

Because of strong winds.

Because of the movement of the liquid.

Because of the extreme weight.

16 / 40

When backing your vehicle, which of the following is NOT recommended

back towards the right side

back and turn towards the driver's side

back as slow as possible

use the lowest reverse gear

17 / 40

Why should you use chocks when parking a trailer without spring brakes?

the trailer wheels are free to turn as there will be no service brakes should the air supply in the trailer air tank leak

to prevent someone from stealing the vehicle

to prevent a runaway trailer

the trailer wheels are free to turn as there will be no emergency brakes should the air supply in the trailer air tank leak

18 / 40

What does the service brake system do?

they are part of an official vehicle inspection

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 valves that maintain air tank pressure

19 / 40

Select the statement that is true in regards to managing space to the sides.

high gust winds do not cause any issues for triples and doubles

you should try to avoid driving next to others when possible

all answers listed

you should always keep your vehicle to the right side of the lane

20 / 40

Another term for a smooth bore tank is:

A tank that is easily portable.

A tank that is made out of stainless steel.

A liquid tank that does not have baffles.

A liquid tank that has baffles.

21 / 40

You should___to reduce the air leakage rate.

monitor the air pressure gauge as you press on the brake pedal

release the service brake as the engine is running

release the service brake after turning off the engine

leave the engine running while charging the air system

22 / 40

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

Your spouse

The shipper

The driver

The carrier

23 / 40

The container for the mechanism that transforms the steering column action into wheel action is:

Steering linkage

Air brake system

Steering hoses/box

Locking pin

24 / 40

Your bus is disabled. With riders aboard, the bus may be towed or pushed to a safe place only:

If getting off the bus would be more risky for the riders.

By a 27,000 lbs gvwr or larger tow truck.

If the distance is less than 500 yards.

By another bus with its four-way flashers on.

25 / 40

While completing the 1st component of the air brake check you are required to fully push down on the foot brake and _____.

both of the answers listed

see if the air pressure drops more than 4 lbs in a minute while holding it down for a full minute in a combination vehicle

none of the answers listed

see if the air pressure drops more than 3 lbs in a minute while holding it down for that full minute in a single vehicle

26 / 40

While driving on a clear night with low beam headlights, you should be able to stop within:

The distance you will travel in the next 20 seconds.

The distance you can see ahead of you.

2 lengths of your vehicle.

Half of a football field.

27 / 40

Which of the following statements is FALSE:

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

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.

28 / 40

To transport cargo safely, which of these are you NOT responsible for?

inspecting the cargo

making sure that cargo is properly secured

ensuring the freshness of sealed cargo

recognizing possible overloads

29 / 40

What is a passive railway crossing?

The type of crossing with no cross buck sign.

The type of crossing where you can pass the tracks without stopping.

The type of crossing, which does not have any type of traffic control device.

The type of crossing on which the driver does not have to stop.

30 / 40

Where are shut-off valves located?

at the back of the trailer

either at the front or the back of the trailer

at the front and back of the trailer

at the front of the trailer

31 / 40

This object should not be damaged, bent, or rusted through and be evenly centered with the tires and dual wheels evenly separated.

Lug bolts

All answers listed

Budd spacing or spacers

Tire rims

32 / 40

What is the value of the overhead rear-view mirror inside of the bus?

To check blind spots.

To provide visibility directly in the back of the bus.

To monitor passenger activity.

To monitor the driver's appearance.

33 / 40

Your vehicle is going down a long hill and your brakes begin to fail. What should you do?

downshift

pump the brake pedal

look for an escape ramp or an escape route

put the gears in neutral

34 / 40

Which trailer is most likely to turn over when you make a sudden turn while pulling doubles?

there is an even chance for either trailer

trailers will never turn over

the rear trailer is twice as likely

the front trailer is twice as likely

35 / 40

Who is responsible for certifying on the bills of lading that the hazardous materials are prepared properly?

The shipper

The driver

The dock workers

The carrier

36 / 40

A driver of a tanker should use an escape ramp when _____.

only when it's raining

the vehicle has lost braking power

when the tanks has bulkheads

only in ideal conditions

37 / 40

The safety valve is usually set to open at:

225 psi

75 psi

125 psi

150 psi

38 / 40

The average person requires how many hours of sleep per 24 hour period?

5 or 6

7 or 8

6 or 7

8 or 9

39 / 40

How far before a railroad crossing should you stop your bus?

50 to 75 feet

15 to 50 feet

10 to 35 feet

100 feet exactly

40 / 40

When transporting explosives you may not park:

Near an open fire.

Within 5 feet of the traveled part of the road.

All of these answers are correct.

Within 300 feet of a tunnel.

Your score is

The average score is 50%

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