iowa
CDL Practice Test

0

Below are practice questions for the Iowa CDL test. The site is free and you are able to take the practice test as many times as you need to as you prepare to obtain your Iowa CDL. The questions and answers covered in these Iowa practice CDL tests are taken from the Iowa DOT CDL manual. 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.

1 / 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:

2 / 40

You should___when driving down a long steep hill.

3 / 40

A tank trailer should never be fully loaded due to:

4 / 40

This object releases the fifth wheel locking jaw to allow uncoupling.

5 / 40

How should the hand valve be used?

6 / 40

What are the three types of emergency equipment that you must have with your vehicle?

7 / 40

Alcohol evaporators in some air brake systems help to:

8 / 40

Select the statement that is not part of the air-brake system:

9 / 40

When does your vehicle's single brake system need an adjustment?

10 / 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.

11 / 40

What is the best way to see the sides and rear of your vehicle?

12 / 40

Which of the following factors is NOT used to determine your safe speed when going down a long steep downgrade?

13 / 40

Play of the steering wheel should not exceed:

14 / 40

Select the true statement about convex ("spot") mirrors.

15 / 40

Which of these statements about speed management and braking is true?

16 / 40

_____ create a little above 90 degree angle between the adjuster arm and push rod when the brakes are released and no less than 90 degrees when the brakes are applied.

17 / 40

Check to ensure that____when inspecting the coupling.

18 / 40

Drivers who transport route controlled radioactive materials must carry a dated certificate of radioactive materials training. This training must have ocurred within the last:

19 / 40

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

20 / 40

This object should not move more than an inch by pulled by hand with the brakes released for manual slack adjusters.

21 / 40

The safety valve is usually set to open at:

22 / 40

You downshift automatic transmissions ______.

23 / 40

Why do air brakes take longer to stop than hydraulic brakes?

24 / 40

The purpose for the emergency air line is:

25 / 40

Select the statement that best describes what the service line is for.

26 / 40

What keeps air in the tanks should the air compressor develop a leak?

27 / 40

You should keep a minimum of ____between another vehicle and the double trailer with 100 ft truck driving at 30 mph.

28 / 40

This item should be firmly attached the to frame, be solid, and clear of objects:

29 / 40

Where are the two main places where the hazardous material identification number appears?

30 / 40

The manual says you should look _____ ahead while driving.

31 / 40

Select the best description of a baffle tank:

32 / 40

You need to raise the landing gear just to the height of where it clears the pavement before driving.

33 / 40

What school bus accidents should be reported?

34 / 40

Which trailer should be the first one after the tractor?

35 / 40

The front trailer supports should be____before driving away.

36 / 40

When driving tank vehicles you should:

37 / 40

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

38 / 40

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

39 / 40

Air brake systems should not lose air faster than____when testing for air leakage rates in combination vehicles before applying the brake pedal.

40 / 40

What do you need to do to supply air to the air tanks of the second trailer?

Your score is

The average score is 0%

5/5 - (1 vote)

CDL Category Practice Tests

CDL Practice Test

How To Get An iowa Commercial Drivers License

Individuals may apply for their CDL starting at age 18. To be eligible for interstate driving as well as HazMat and Doubles/Triples applicants must be 21 years of age or older. All individuals applying for an Iown CDL must present a Medical Examiner’s Certificate according to the United States Federal Regulations.

If any one of the descriptions below is true about an applicant, they will be disqualified from receiving their CDL.

  • Driver posses more than one driver’s license.
  • Driver was convicted of driving under the influence in the past 24 months.
  • Driver has a suspended, denied, canceled, or revoked driver’s license.

Endorsements
H – Hazardous Materials
N – Tank Vehicle
T – Doubles/Triples
X – Hazmat and Tank Comb
P – Passenger Vehicle
S – School Bus

Drivers must take a knowledge test as well as a practical skills test to showcase their knowledge of commercial driving laws and their ability to operate a commercial vehicle.

Hit the Open Road

iowa CDL License Test Tips

Applicants must complete a general knowledge test to display their understanding of commercial driving laws. The general knowledge exam is comprised of 50 questions. Those seeking a Class A CDL will need to complete an additional 20 question test on combination vehicles. Applicants seeking additional endorsements will need to take an additional test on the endorsement topic. The Passenger, Tank, and Doubles/Triples Endorsements are 20 question tests. Removing the Air Brake Restriction, the Iowa Operator and School Bus Endorsements are 25 questions. The Hazmat Endorsement is a 30 question test. All applicants must pass the respective assessments with a score of 80 percent or better to receive their Iowa CDL permit.

A skills assessment is required of all applicants. This assessment is comprised of three parts, which are the pre-trip inspection, basic controls skills, and on-road driving. Individuals applying for their P and S endorsements will be required to take the skills test in the respective vehicle for their endorsement.

Additional Information

Information on the Iowa Department of Transportation

The Iowa Department of Transportation administers CDL requirements and testing in Iowa. To get more information contact them via:

Website: https://iowadot.gov/DriversVehicles#CommercialDrivers

Phone:  515.239.1101

 

Additional Iowa CDL Helpful Links

Please use the links below to access more valuable Iowa CDL testing resources and to learn more about practice driving tests for the state of Iowa.