Free Iowa CDL General Knowledge Practice Test 2023

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 2021 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
The driver is responsible for all of the following except for:
You are driving on a slippery road during the day. What does the Driver’s manual say about how much space you should keep ahead of your truck?
When securing concrete pipe over 45 inches loaded crosswise, which direction must the tiedowns on the rear half of the load run?
On what day and time does a 14 hour rule violation occur?
Day 1

Day 2
The purpose of the retarders is to:
What should you do before driving in mountains?
What time does a 14 hour rule violation occur?
Which of these statements is true?
You are driving in an area with few streetlights, if you cannot see well with your headlights, which of the actions may help:
Why Do HOS Regulations Exist?
Which of these is correct about emergency or evasive action?
Major signs of tire failure could include:
Option #3 for securing metal coils transported with eyes lengthwise includes all of the following except:
How current must your logbook be?
When securing rolls of paper with eyes vertical, how many points of contact are required to consider a roll secure?
What should you do when you see a hazard in the roadway ahead of you?
California allows 20,000 pounds maximum on the steer axle. The tread width of your tires is 11 inches, and the load rating on your steer tires is 7000 pounds. How much weight can you carry on your steer axle in California?
The Aggregate Working Load Limit should, at minimum, be:
What are the four basic weight limits?
What is the Aggregate WLL of the securement system for a load secured with 7 tiedowns: 3 rated at WLL of 4,000 lbs, 2 at 6,500, and 1 at 8,000?
Three serious traffic violations in a 3-year period will result in a CDL disqualification of:
You should signal continuously while turning because:
When hauling livestock, to prevent them from moving around too much and causing a dangerous situation you would use:
As part of the log packing requirements:
Cargo is contained when:
What is the minimum securement requirement for paper rolls with eyes vertical with a width between 1.25 and 1.76 its diameter?
Your vehicle is in a traffic emergency and may collide with another vehicle if you do not take action. Which of these is a good rule to remember at such a time?
What is a reusable, transportable enclosure that is especially designed with integral locking devices that secure it to a container chassis trailer to facilitate the efficient and bulk shipping and transfer of goods by, or between various modes of transport, such as highway, rail, sea, and air.?
Specific suspension problems that drivers should look for include which of the following:
What is the minimum WLL required of tiedowns securing loaded intermodal containers on non-chassis vehicles?
Which of the following is not a reason why loads should be secured?
The best way to keep brakes from getting too hot while going down long grades is to:
A key principle to remember about loading cargo is to keep the load:
You are checking your brakes and suspension system for a pre-trip inspection. Which of these statements is NOT true?
An outside vehicle observation will be scored every time the driver:
What should you do while turning?
Vehicles should be equipped with all of the following emergency equipment except:
The basic control skills exam allows for a maximum of how many points scored?
What is a headboard?
To determine blood alcohol concentration level for a person, it is necessary to know:
A steel coil weighing 21,000 lbs requires how much securement against forward movement?
If you hear on the radio that there is a major snowstorm forecast along your route, will you qualify for the Adverse Driving Conditions Exception?
When securing flattened or crushed cars on a vehicle with containment on 2 sides, how many tiedowns, at minimum, are required?
What is the maximum ideal angle for an effective direct tiedown?
When securing building materials, how many tiedowns are required for top tier bundles longer than 5 ft?
On what day and time does an 11 hour rule violation occur?
Day 1

Day 2

Your trailer has a 6 inch hole spacing in the tandem slider rail and your trailer tandems are 900 pounds overweight. What is the minimum number of holes you will have to slide the tandems to get the tandems within legal limits?
When involved in an accident and not seriously injured, basic steps you should take include assist the injured, notify authorities, and:
Working Load Limit (WLL)is defined as:
If you are able to exert 200 pounds of force against an object but you are only exerting 50 pounds of force to do so, what method are you applying to make this happen?