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

What handling effect will baffles have?

None of the answers listed.

There will be an increase in slow surge.

There will be less of surging front to back.

There will be less side to side surging.

2 / 40

When arriving at the destination announce:

All of these answers are correct.

The location.

The reason for stopping.

The next departure time.

3 / 40

Which of these statements about signaling is correct?

Signal your intentions early and continuously.

Signal to others that it is safe to pass your bus.

Leave your signal on long after you've changed lanes.

Signaling is a warning, not a request.

4 / 40

Most states require school bus drivers to take a physical examination:

Twice per year

Annually

Every 2 years

Every 3 years

5 / 40

Why should you test the tractor protection valve?

to avoid the emergency brakes kicking on due to loss of air

to avoid loss of air from the air hose

all answers listed

to avoid loss of air from the trailer brakes

6 / 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

7 / 40

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

All of the answers listed.

The weight of it.

The legal weight limits.

The amount of expansion that will occur.

8 / 40

Select the true statement in regards to an application pressure gauge:

when accelerating it releases air

it is connected to the generator

it shows how much air pressure you are applying to the brakes

it prevents the brakes from failing

9 / 40

There must not be more than_____for engine compartment belts.

1/2 inch of play at the end of the belts

1/2 inch of play at the center of the belt

3/4 inch of play at the center of the belt

1/4 inch of play at the ends of the belt

10 / 40

How do you make sure the trailer height is correct before coupling?

visually check that they are level height wise

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 the lead trailer is higher than the fifth wheel so that the trailer will lower when the dolly is pushed under it

you do not need to do a visual check

11 / 40

Select the true statement in regards to when a bulk tank vehicle stops at an intersection on a slippery surface:

The movement of the liquid may push the truck into the intersection.

The trailer may slide into the oncoming traffic.

The liquid may leak out of the tank.

The trailer may slide to the side due to the rocking motion.

12 / 40

What does the amount of liquid you can carry depend on?

The outage of the liquid.

The center of gravity.

The vehicle's horsepower rating.

The material the baffles are made from.

13 / 40

Anti-lock brakes:

Lengthen stopping distance.

Keep your wheels from locking during hard brake application.

Work only when you activate in-cab switch.

Are not available in mosst busses.

14 / 40

Which of the following is the most important reason for doing a pre-trip inspection?

because other drivers do it

safety for yourself and other road users

to make sure the vehicle will make your destination

to make sure nothing has been stolen from the vehicle

15 / 40

If you are stopped on an incline, how can you start moving without rolling back?

apply the parking brake

fully engage the clutch

shift to neutral

aggressively pump the accelerator

16 / 40

You must control how far packages labeled "Radioactive II" or "Radioactive III" are located from people and cargo space walls by referring to:

The segregation and separation chart.

The list of hazardous materials and reportable quantities.

The table of hazardous materials.

The transport index and the separation distances table.

17 / 40

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

The level of the fluid.

The distrubition of weight.

All answers listed.

The high center of gravity.

18 / 40

Select the true statement in regards to your brake function when your ABS fails

you will need to pull over immediately

the abs will need to be repaired but the brakes will function normally

there is a huge fire risk

you will have no control over your truck as the brakes will not be functioning

19 / 40

Which of the following is a key steering component?

bearing plate

gear box

torque rod

leaf spring

20 / 40

Which of the following statements about stopping distances is NOT true?

trucks traveling on ice or snow require greater stopping distances

brakes, tires, springs and shocks are designed to work best when the truck is empty

empty trucks require greater stopping distances because they have less traction

trucks traveling at higher speeds require greater stopping distances

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.

All of these answers are correct.

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

The interlock releases when you close the rear door.

22 / 40

What placards, if any, do you need if your load includes 20 pounds of Division 2.3 gas and 1,001 pounds of flammable gas?

Poison 23 and flammable gas 21.

None, you cannot load these materials together.

Just dangerous placards are required.

Poison 23 and dangerous.

23 / 40

How often should you check the tires if your placarded trailer has dual tires?

Check tires every 2 hours or 100 miles.

Check tires every 4 hours or 200 miles.

Check tires every 3 hours or 150 miles.

Check tires every hour or 75 miles.

24 / 40

The safety catch for the fifth wheel locking lever must be ____ for a coupling to be complete.

threaded through the locking lever

below the locking lever

above the locking lever

sticking straight up

25 / 40

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

all of these answers are correct

someone could start and move the truck

it could damage the starting mechanism

someone could steal the truck

26 / 40

If the hazardous materials are classified as FORBIDDEN you should:

Remove the placards from the trailer.

Place the materials in the front of the trailer.

Take special caution in transporting the material.

Refuse the load.

27 / 40

When backing, what is the best method to use to avoid blind spots?

back towards the driver's side, where you can see better

use mirrors on both sides

use a helper

look at your path

28 / 40

Which of the following is the proper definition of a cargo tank?

A bulk container which can be securely affixed to a vehicle.

A bulk container permanently attached to a vehicle.

A bulk container not permanently attached to a vehicle.

None of these answers are correct.

29 / 40

The most stable tanker shape is:

Cylindrical

Round

Elliptical

Square

30 / 40

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

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

there are no issues that occur from quick steering

it is easier to countersteer compared to other vehicles

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

31 / 40

At what pressure is the safety valve in the air compressor tank set to open?

150 psi

100 psi

125 psi

225 psi

32 / 40

With Division 1.2 or 1.3 Explosive B, how close to the travelled part of the roadway can you park?

Minimum of 10 feet

Minimum of 15 feet

Minimum of 2 feet

Minimum of 5 feet

33 / 40

Select the true statement about baffled tankers:

None of the answers listed.

It has walls with holes inside for liquid to flow through.

It has separate tanks.

It has hollow balls in it to slow the motion of the liquid in the trailer.

34 / 40

On a drawbridge, you do not need to stop, but must slow down and make sure it's safe, when:

Both of these answers are correct.

There is a traffic light showing green.

None of these answers are correct.

The bridge has an attendant or traffic officer who controls traffic whenever the bridge opens.

35 / 40

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

look for an escape ramp or an escape route

put the gears in neutral

downshift

pump the brake pedal

36 / 40

What are spring brakes?

they are big springs with air pressure in them if the air pressure decreases, the brakes are applied

they are large springs that are held closed by air pressure if the air pressure is increased the brakes are applied

they are powerful springs that are restrained by air pressure when the air pressure is removed, the brakes are applied

none of the answers listed

37 / 40

You must not allow riders to stand:

Within two feet of any window.

Between the wheel wells.

Within two feet of an emergency exit.

In front of the standee line.

38 / 40

The trailer should be lowered so that _____.

you are able to use the landing gear to make adjustments

it is slightly raised when the tractor is backed under it

the tractor comes in contact with the nose of the trailer

the trailer is high above the fifth wheel

39 / 40

What can side to side surge cause?

An engine system failure.

A roll over.

A spontaneous combustion.

An increase in speed.

40 / 40

You should expect____when backing a tractor under a trailer.

the end of the kingpin to be level with the top of the fifth wheel

the trailer to lift slightly

the trailer landing gear to be fully extended

the trailer to be completely still

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