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?

There will be an increase in slow surge.

None of the answers listed.

There will be less of surging front to back.

There will be less side to side surging.

2 / 40

Which of the following will confirm that you are driving with anti-lock brakes?

The certification on the driver side door.

Red indicator lamp on the brake cylinder.

The bus operators manual.

Yellow abs malfunction lamp on the instrument panel will light when you start the engine.

3 / 40

What is the best way to figure out how many seconds of following distance you have?

use the stopwatch on your phone to try to determine how long before you reach a mile marker after the car in front of you appeared to reach it

wait until a vehicle passes a shadow or landmark, then count the seconds until you pass it

text a friend and tell them to text you back in ten seconds and see how long that seemed to take compared to how far you traveled

get 1/4 closer to the car in front of you, then back off again multiply how long this took you by 4 for following distance

4 / 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:

300 pounds

250 pounds

500 pounds

100 pounds

5 / 40

Some hazardous materials may not be loaded together with other hazardous materials. The prohibited combinations are listed in the:

Segregation and separation chart.

List of hazardous materials and reportable quantities.

Hazardous waste manifest.

Hazardous materials table.

6 / 40

Select the factors that can cause your brakes to fade or fail:

the brakes are out of adjustment

using the service brakes excessively

all of these answers are correct

not relying on engine braking enough

7 / 40

Select the two reasons as to why special care is needed when driving a tank vehicle:

The danger of surge and the high center of gravity.

The danger of surge and the low center of gravity.

None of the answers listed.

The chance of rollover and of spontaneous combustion.

8 / 40

The act of operating a motor vehicle in a selfish, bold, or pushy manner, without regard for the rights or safety of others is known as.

road rage

distracted driving

defensive driving

aggressive driving

9 / 40

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

in the front

in the middle

it makes no difference

in the back

10 / 40

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

11 / 40

Air tanks should be drained:

at the end of each shift or day

manually when the automatic devices fail

all of these answers are correct

to prevent sludge from clogginng up the brake system valves

12 / 40

Which contains more alcohol: a 12-ounce glass of 5% beer, a 5-ounce glass of 12% wine or a 1 1/2-ounce shot of 80 proof liquor?

1 1/2-ounce shot of 80 proof liquor

5-ounce glass of 12% wine

12-ounce glass of 5% beer

they all contain the same amount of alcohol

13 / 40

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

it increases by four times

it stays about the same

none of these answers are correct answers are correct

it increases by two times

14 / 40

Which of the following would NOT be part of a standard vehicle inspection?

bad brake drums or shoes

seating defects

tire problems

steering system defects

15 / 40

Select the false statement about tractor protection valves.

should the trailer air leak, it keeps the air in the tractor

air is allowed to leak from the tractor line when it is closed

the trailer air supply valve in the cab controls it

if the air pressure is low it will automatically close

16 / 40

The air leakage rate for combination vehicles should not be more than _ psi a minute.

17 / 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

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

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

18 / 40

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

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

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

19 / 40

Remember to_____to prevent rollovers.

have the load as low to the ground as possible

have the load centered

all answers listed

drive slowly around turns

20 / 40

The most stable tanker shape is:

Round

Elliptical

Cylindrical

Square

21 / 40

Select the correct setup for shut-off valves:

the rear shut-off valves are closed and the front trailer valves are open

the front and back shut-off valves are open

the front and back shut-off valves are closed

the front shut-off valves are closed and the rear trailer valves are open

22 / 40

What are the dividers that are inside tankers that have an opening at the bottom and top?

Baffles

Layers

Taffles

Bulkmets

23 / 40

You should have the fifth wheel plate greased as recommened because:

it will ensure a good air line connection

it will reduce noise and heat

it will ensure a good electrical connection

it will prevent steering problems

24 / 40

When stopped on a divided highway where should your reflectors be placed?

20 feet, 150 feet, and 300 feet toward the approaching traffic

30 feet, 100 feet, and 150 feet toward the approaching traffic

15 feet, 75 feet, and 150 feet toward the approaching traffic

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

25 / 40

Select the true statement in regards to empty trucks:

they require a shorter stopping distance than a fully loaded trailer

none of the answers listed

they may have poor traction due to bouncing and wheel lockup

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

26 / 40

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

engine brake system

service brake system

lock brake system

none of the answers listed

27 / 40

In the slide mechanism of the sliding fifth wheel, this object should have no missing pins or be loose when fully engaged.

Pintle hook

Locking pins

Rock jaw

Kingpin

28 / 40

If your bus is equipped with an emergency exit door, it must:

Always have a red door light turned on.

Not have any signs, stickers, or markings near it.

Be secured when the bus is being driven.

All of these answers are correct.

29 / 40

What is the normal operating range for a truck's oil pressure?

40-60 psi

30-75 psi

20-30 psi

This is engine-specific

30 / 40

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

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

all answers listed

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

you should try to avoid driving next to others when possible

31 / 40

Select the first action to do when the low air pressure warning comes on:

shift into a higher gear

release the supply control valve

adjust the engine brake

come to a stop and safely park as soon as possible

32 / 40

Cylinders containing compressed gases may only be loaded onto a vehicle without a flat floor or platform if the cylinders are:

Loaded in an upright or horizontal position.

In boxes that will keep them from turning over.

Loaded into racks attached to the vehicle.

All of these answers are correct.

33 / 40

How should the pintle hook be when backing a dolly under the second trailer?

in the latched position

removed from the dolly

in the unlatched position

in a halfway open position

34 / 40

A driver that hauls hazardous materials must attend training every:

3 years

1 year

2 years

None of these answers are correct

35 / 40

What is the purpose of the supply pressure gauge?

to inform you of how much air is in the tank

to inform you about how hot the air in the tank is

to inform you if there is too little air in the tank

all of these answers are correct

36 / 40

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

5 or 6

6 or 7

8 or 9

7 or 8

37 / 40

Select the true statement about empty trucks:

All answers listed.

They have better traction on wet roads than full tanks.

They come to a stop faster when you use only the emergency brake.

They can take longer to stop than a truck with a full tank.

38 / 40

Select the true statement about retest markings:

All answers listed.

Must have a date of the last retest marked.

It shows what type of inspection or test was completed.

They must be stamped on the tank.

39 / 40

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

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

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

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

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

40 / 40

You don't want to use wheel chocks when hooking a combination to a second trailer with no spring brakes. What should you do?

supply air to the trailer air system via the tractor and then disconnect the emergency line

make sure the trailer will not roll away when coupling

use a portable generator to supply brake pressure

none of the answers listed

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