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

In what position should shut off valves on the rear of the last trailer be in on a set of double trailers?

in a closed position for the rear trailer and an open position for the front trailers

in an open position

in an open position for the rear trailer and a closed position for the front trailer

in a closed position

2 / 40

What is the best way to prevent brakes form overheating while drive down a steep grade?

use the trailer brakes only

use the stab braking method

use countersteering practices

drive at a speed of 5 mph below your safe speed

3 / 40

For emergency braking when driving a double trailer and having to use your brakes to avoid a collision is to:

use the engine brake

use stab or controlled braking

apply a firm pressure to the brake pedal and don’t let off

use just the trailer brakes

4 / 40

How often should air tanks be drained?

once a day

every 4-5 days

every 7 days

every 6 hours

5 / 40

Mirrors with a convex surface or "spot" mirrors _____.

make things look farther away and smaller than they actually are

are illegal in most states

make things look closer and larger than they actually are

they show a larger area than flat mirrors so do not need to be checked as often

6 / 40

How many different hazard classes are there?

7 / 40

What are you checking when looking at the lubrication level on a dipstick?

The windshield wiper fluid level

The horn fluid level

The oil level

The power steering fluid level

8 / 40

Make sure____when the front trailer supports are up and the trailer is sitting on the tractor.

there is enough space for clearance between the nose of the trailer and the tops of the tractor tires

there is enough space for clearance between the landing gear and the tractor frame

neither of the answers listed

both of the answers listed

9 / 40

Select the situation in which you should use the hand valve to park a combination vehicle.

during the winter

when parking at loading docks

when parking on a grade

in no situation

10 / 40

Animals and human foodstuffs should not be loaded in the same vehicle with?

Poisons

Flammable gases

Flammable liquids

Explosives

11 / 40

Tires should should be replaced:

if the tread depth on your front tires is less than 4/32 deep

all of these answers are correct

when the tread separates

when there are broken valve stems

12 / 40

What color are all school buses painted?

National school bus yellow.

The individual district decides the exact color.

Florescent yellow.

Orange yellow.

13 / 40

Which of the following parts do not get checked in the Bus Interior inspection:

Each hand-hold and railing.

Seat coverings.

Emergency exit handles.

Signaling devices, including the restroom emergency buzzer, if the bus has a restroom.

14 / 40

Where should you place your warning devices if you must stop on a one-way or divided highway?

10 feet, 100 feet, and 200 feet toward approaching traffic

100 feet, 200 feet, and 300 feet toward approaching traffic

50 feet, 100 feet, and 150 feet toward approaching traffic

20 feet, 50 feet, and 100 feet toward approaching traffic

15 / 40

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

there may be an emergency line air leak

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

it is not a big problem

there may be a service line air leak

16 / 40

This object is not checked at the rear of the trailer.

The back doors

The mud flaps

The header board

The bumper

17 / 40

What should you hear when you have the hand valve on and are testing the trailer brakes by opening the service air line at the back of the trailer?

the engine brake to kick on

the service brakes more to a fully applied position

air leaving the open valve

the emergency line valve to release air

18 / 40

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

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

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

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

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

19 / 40

This should be cleaned and then adjusted properly while inside the cab.

The headlights

The windshield

The lug bolts

The mirrors

20 / 40

You must be alert for road hazards so that:

You can help impaired drivers.

Accident reports will be accurate.

Law enforcement personnel can be called.

You will have time to plan your escape if the hazard becomes an emergency.

21 / 40

The most important hand signal you should agree on with a helper is:

“go”

“turn up the music”

“stop”

“faster”

22 / 40

You should activate hazard lights within approximately how many feet before railroad crossing?

400 feet

250 feet

200 feet

300 feet

23 / 40

This gauge has a governor cut-off.

The ammeter gauge

Air gauge

The coolant temperature gauge

Oil pressure gauge

24 / 40

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

The amount of expansion that will occur.

All of the answers listed.

The weight of it.

The legal weight limits.

25 / 40

Vehicle handling can become unsafe if the weight is not properly balanced. Hard steering can be caused by:

high center of gravity

under loaded front axles

too much weight on the steering axles

too little weight on the driving axles

26 / 40

What is most likely to occur when driving double and a set of trailer wheels goes into a skid?

none of the answers listed

the rig will continue straight ahead but will slide sideways

the tractor will continue moving in a straight line no matter how you turn the steering wheel

the trailer will jackknife

27 / 40

When should you drain air tanks that do not have an automatic tank drain?

once every 7 days

every 4 hours of the working shift

once every 14 days

at the end of each working day

28 / 40

Before transporting a sealed load, you must check:

a picture of whatever is inside

a small sample of whatever is inside

that you don't exceed gross weight and axle weight limits

all of these answers are correct

29 / 40

Off-tracking happens when going around a corner and:

the rear part of the trailer goes into the shoulder

the rear wheels follow a different pathway than that of the front wheels

the front part of the trailer pulls to the right

the rear wheels follow the front wheels in a straight path

30 / 40

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

empty trucks require greater stopping distances because they have less traction

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

trucks traveling at higher speeds require greater stopping distances

31 / 40

Select the true statement in regards to empty trucks:

they may have poor traction due to bouncing and wheel lockup

none of the answers listed

they require a shorter stopping distance than a fully loaded trailer

they are easier to stop because there isn't cargo shifting in the trailer

32 / 40

The golden rule for school buses when approaching and crossing railroad tracks is:

Stop, go, and stop.

Stop, look, and turn on the radio lights overhead.

Stop, look, and listen.

None of these answers are correct.

33 / 40

The trailer should be lowered so that _____.

it is slightly raised when the tractor is backed under it

the trailer is high above the fifth wheel

the tractor comes in contact with the nose of the trailer

you are able to use the landing gear to make adjustments

34 / 40

Always try to back toward the driver's side because

it's more comfortable for turning your neck

your truck will naturally pull toward the driver's side

all of these answers are correct

you can see better, watching the vehicle rear out the side window

35 / 40

Do converter dollies have spring brakes?

none of the answers listed

yes

some do

36 / 40

Select when you should use the parking brake:

each time you leave your vehicle for any amount of time

when in residential areas

when you are leaving your vehicle for more than an hour

with rare exception, every time you leave your vehicle

37 / 40

Rods, connecting links, and arms from the steering box to the wheel are a part of the:

CB radio

Power steering fluid

Braking system

Steering linkage

38 / 40

With most hazardous materials, you may park within 5 feet of the road briefly, if your work requires it. The materials that are the exception and do not allow parking this close to the road are:

Acids and poisons

Explosives A and B

Corrosives and oxidizers

Liquids

39 / 40

Which of the following statements about "Radioactive" labels is true?

Yellow iii indicates the highest level of radioactivity.

Yellow ii indicates the highest level of radioactivity.

Black iii indicates the highest level of radioactivity.

White i indicates the highest level of radioactivity.

40 / 40

What can you do at an accident site to help avoid another accident?

put out warning devices so people don't run into the accident site

have a drink to calm your nerves

leave your vehicle, do nothing, and get to higher ground

stay in your vehicle and do nothing until help arrives

Your score is

The average score is 0%

5/5 - (2 votes)

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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