Free Iowa CDL General Knowledge Practice Test 2022

You are looking for actual practice for your coming CDL test? So you have come to the right place. Our IA General Knowledge Practice Test has the same questions as the real exam which is based on the Iowa CDL Manual. Our CDL practice test pack covers most of the subject areas on the Iowa General Knowledge Test such as shifting techniques, railroad crossing safety, drunk driving laws, and much more to make you become a safer driver. In addition, each question has a detailed explanation that will help you understand the concept and answer future questions about it correctly. If you don't get the pass right away, don't worry, you can take this practice test an unlimited number of times to make sure you learn all the questions. Our Iowa CDL Practice Test will refine your driving knowledge so you can earn your CDL and start driving on the roads. Let’s take our practice test now!

Our CDL practice tests:
Based on 2022 IA commercial driver's license manual
Full answers + detailed explanations
Perfect for first-time, renewal applicants
IA CDL General Knowledge Test format:
50 questions
40 correct answers to pass
80% passing score
List of questions
1.
Void filler is:
2.
When merging:
3.
A vehicle is loaded with very little weight on the drive axle. What may happen?
4.
By law, who is ultimately responsible for ensuring the safety and road-worthiness of a CMV?
5.
Hydroplaning:
6.
You are checking your steering and exhaust system in a pre-trip inspection. Which of these problems, if found, should be fixed before the vehicle is driven?
7.
How many days are you required to keep your completed logs?
8.
Whenever you double your speed, your vehicle has about how many times of destructive power if it crashes?
9.
The maximum safe weight that a tire can carry is:
10.
Is there a 14 hour rule violation on Day 2?
Day 1

Day 2
11.
When is it a good idea to use drugs to help you stay awake while driving?
12.
Which of these is a good thing to remember when crossing or entering traffic with a heavy vehicle?
13.
What violations occurred on Day 2 of this example?
Day 1

Day 2
14.
All vehicles on all highways have a maximum allowable height of:
15.
You're loaded heavy with 1/2 tank of fuel onboard. Using the following numbers, where should you move the 5th wheel to get it setup properly?

steer axle: 12,300 pounds
drive axles: 33,100 pounds
Weight transfer: 500 pounds per hole
16.
When you sight-side back your vehicle into an alley stopping as close as possible to the rear of the alley it is called:
17.
What is a rub rail?
18.
When securing concrete pipe with a diameter up to 45 inches loaded crosswise as a group,lengthwise tiedowns should be either one 1/2 in chain or wire rope, or:
19.
To help slow the vehicle to reduce the need for using the service brakes, some vehicles are equipped with:
20.
A hazmat endorsement will be denied or canceled if:
21.
A tiedown is defined as:
22.
There are two types of jackknife, they are:
23.
Which of these is true about the use of drugs while driving?
24.
What affect will sliding the trailer tandems forward have on the weight distribution?
25.
Timber used for dunnage must be all of the following except:
26.
When loading a trailer, if the cargo is loaded all to the rear, it may result in:
27.
You must park on a side of a level, straight, four-lane divided highway. Where should you place the reflective triangles?
28.
When you are starting to move up a hill from a stop:
29.
The proper time to cancel your turn signal for a lane change or turn is:
30.
A friction mat is used to:
31.
Ways that drinking alcohol can affect the brain include:
32.
Drivers must have a CDL to legally drive:
33.
Which statement is true?
34.
If you slide the 5th wheel toward the nose of the tractor, what will be the effect?
35.
Your vehicle has hydraulic brakes. While traveling on a level road, you press the brake pedal and find that it goes to the floor. Which of these statements is true?
36.
When using tiedowns for securing cargo, what is the general rule regarding cargo length.
37.
If you do not have a CB-radio, what procedure should you follow on an accident scene?
38.
A DUI conviction for a CDL-holder will result in disqualification for a minimum of:
39.
Which of these items is NOT checked for a pre-trip inspection?
40.
An intermodal container is:
41.
All of the following are good tips to staying fit and ready to drive except:
42.
What is the correct method of determining what percentage of fuel is distributed between the steer axle and the drive axles?
43.
What should you do when your vehicle hydroplanes?
44.
Water should never be used to put out a gasoline fire, and also what other kind of fire?
45.
Which of the following is considered off duty time?
46.
When checking the general condition of the vehicle, which of the following should be specifically addressed?
47.
Putting too much weight towards the rear may cause all of these except:
48.
Whenever you double your speed, it will require how much more distance to stop?
49.
Requirements for securing two stacks of shortwood loaded side-by-side include:
50.
Oil, coolant, charging circuit warning lights should go out: