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

You should_____when the low pressure warning is activated:

wait until the air brakes kick in automatically

come to a safe stop while you still have control of the brakes

pump the brake pedal to come to a stop immediately

maintain highway speed and keep an eye on your air pressure gauge

2 / 40

"Outages" is the word to describe the amount of space required for liquids to expand in as they warm.

False, it's when the vehicle power system fails in some way

False, it's when the vehicle engine fails in some way

False, it's when the vehicle air braking system fails in some way

True

3 / 40

You should turn off your engine when loading flammable liquid unless:

You need the engine to run the pump.

You are loading at night and need the headlights.

The material does not need a placard.

You are a non-smoker.

4 / 40

Select how brakes work on long, steep downgrades:

it is the main braking mechanism

it's the main braking mechanism with the engine braking system available for emergency situations

they are a supplement to the braking effect of the engine

it does not do anything

5 / 40

Which of the following types of emergency equipment must you have on your bus?

Reflectors, fire extinguisher, and accident reporting kit.

Fire extinguisher, spare electric fuses, and reflectors.

Hydraulic jack, fire extinguisher, and signal flares.

Spare electric fuses, fire extinguisher, and accident reporting kit.

6 / 40

How often should you check the tires on a placarded trailer that has dual tires?

Once every three hours.

Start of each day and every time you stop.

Once every 100 miles.

Each time you stop.

7 / 40

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

The lug bolts

The windshield

The headlights

The mirrors

8 / 40

Why does it take special skills to haul a tank vehicle?

All of the answers listed.

The weight of the load is high up off the road.

There is a high center of gravity.

It is top heavy.

9 / 40

The emergency air line is _____and the service air line is____.

white, blue

red, blue

yellow, white

red, green

10 / 40

This component should be checked that it is solid, securely bolted to the tracture frame, and clear of objects.

The locking kingpin

The platform

The catwalk

The fifth wheel

11 / 40

What should you hear when you test the trailer brakes by opening the service air line at rear of trailer with the hand valve on?

the emergency air line will release air

you should hear air escape from the open valve

none of the answers listed

the service brakes will move to a fully applied position

12 / 40

You should be extra cautious when___while driving a smooth bore tanker combination.

unloading or loading

driving down a hill

driving up a hill

stopping and starting

13 / 40

If you double your speed, what will happen to your stopping distance?

it stays about the same

none of these answers are correct answers are correct

it increases by two times

it increases by four times

14 / 40

What is the earliest way to notice a trailer skid?

you can see it in your mirrors

you can feel it pulling your steering wheel

you can hear the tires squealing

you can feel a jerk in the back of the tractor

15 / 40

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

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

On a temporary license plate holder and the steering wheel.

Any bulk packaging and the cargo tanks.

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

16 / 40

You should back up slowly until____when coupling the trailer.

the tractor comes in contact with the front of the trailer

the fifth wheel has just touched the trailer

the cargo inside the trailer shifts

the rear wheels are visible in the mirror

17 / 40

What is the stopping distance for a tractor trailer that is traveling at 55 mph on dry pavement?

about 200 feet which is 2/3 of a football field

about 300 feet which is about a football field length

about 600 feet with is about two football field lengths

about 150 feet which is 1/2 of a football field

18 / 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

19 / 40

Drivers placard their vehicle to _____ the risk.

minimize

elevate

communicate

take away

20 / 40

Which of the following must drivers have in their possession while transporting class A or B explosives?

A gas mask.

The written route plan.

The carrier's insurance policy.

None of these answers are correct.

21 / 40

Select the portion of the combination vehicle that is most likely to turn over suddenly when pulling a double trailer:

the front trailer

all are equally likely

the back trailer

the tractor

22 / 40

Select the true statement about converter dollies:

they typically require a glad hand converter

because of their small size they have little braking power

they usually do not have spring brakes

all answers listed

23 / 40

When would a drive-wheel skid result in a jackknife when pulling doubles?

when the trailer pushes the towed vehicle sideways

when the trailer slides to the right into the shoulder

when the tractor brakes lock up

when the tractor spins around

24 / 40

The system that needs to be checked for signs of leaks with rust or carbon soot and damage is the _____.

fifth wheel

exhaust

air brake system

none of the answers listed

25 / 40

How do you determine if slack adjusters need to be adjusted?

activiate the parking brake and service brake

release the parking brakes and service brakes

release the parking brakes and activate the service brakes

pull out the automatic slack adjustment control knob

26 / 40

Select the true statement in regards to empty trucks:

none of the answers listed

they may have poor traction due to bouncing and wheel lockup

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

27 / 40

In the event of an accident you should remember to do the following EXCEPT:

move the victims out of the way immediately

protect the area

stop any bleeding and keep the victims warm

notify authorities

28 / 40

This object should not be spliced, cut, chafed, or worn through to allow steel braid to show.

The lockjaw

Tires

Mud flaps

Electric/air lines

29 / 40

While completing the 3rd component of the air brake check of a combination vehicle, at what psi should the tracor protection valve and parking brake valve should pop out?

20 psi

70 psi

They should never pop out

40 psi

30 / 40

Why is it dangerous to unlock the pintle hook with the dolly still under the rear trailer?

the spring brakes may release

the dolly tow bar may fly up

the fifth wheel may be misaligned

the kingpin may snap in half

31 / 40

You must be alert for road hazards so that:

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

You can help impaired drivers.

Accident reports will be accurate.

Law enforcement personnel can be called.

32 / 40

Which of the following statements about bus evacuation is true?

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 police.

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

33 / 40

Why are you required to take an exam about air brakes?

it is a federal requirement

all trucks have air brakes

you cannot receive a CDL at all otherwise

you would have to get a CDL with a restriction otherwise

34 / 40

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

The amount of expansion that will occur.

The weight of it.

All of the answers listed.

The legal weight limits.

35 / 40

The amount of liquid you can carry depends on:

How much the liquid will expand during the trip.

All answers listed.

The density or weight of the liquid.

How much you can legally carry.

36 / 40

You should____when an emergency requires you to quickly stop due to a crash.

use only the engine brakes

use the hand valve

maintain pressure on the brake pedal

use stab or controlled braking

37 / 40

You should make sure the_____before backing under a trailer.

trailer brakes are locked down

tractor shut off valve is normal

landing gear is fully raised

air brakes have been shut off

38 / 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 600 feet

At least 400 feet

At least 300 feet

At least 500 feet

39 / 40

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

Power steering fluid

Braking system

Steering linkage

CB radio

40 / 40

A driver that hauls hazardous materials must attend training every:

1 year

None of these answers are correct

3 years

2 years

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