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
You are checking your tires for a pre-trip inspection. Which of these statements is true?
Sometimes you need to leave a road to avoid a hazard or emergency. When you do, you should keep in mind, that:
As a way to maximize all time available, you should always do the following:
If you have to make a vehicle inspection report you must sign it
On what day and time does an 11 hour rule violation occur?
Day 1

Day 2
When should drivers inspect their vehicles?
Which of these is true about hazardous materials:
The distance the truck will travel between noticing a hazard and hitting the brakes is:
In cargo securement, a wedge is defined as:
Cargo inspection:
When securing metal coils with eyes vertical, the angle between tiedown and deck, if possible, should be:
To prevent brake fade you should:
A container chassis vehicle is defined as:
The responsibility for repairing items noted on the pre-trip report that affect safety belongs to:
Overweight, oversized loads:
If you are being tailgated, you should not:
Which of the following is not true of Working Load Limit (WLL)?
A securement system must be capable of resisting how much lateral (side-to-side) force, at minimum?
Drivers are generally only allowed to use cell phones or text in all of the following situations except:
What is the minimum angle that indirect tiedowns must form with the vehicle?
You weigh the truck immediately before and after fueling. Based on the following, determine what percentage of the weight goes to each set of axles:

Before fueling:

steer: 11,100, drives: 32,600, gross: 71,400

After fueling:

steer:11,850, drives: 32,850, gross: 72,400

Good general shifting techniques for going down a long downgrade include:
You are checking your wheels and rims for a pre-trip inspection. Which of these statements is true?
Every time you pull off the expressway to take a break, you use about how much time off your 11-hour driving limit?
If you must cross into the oncoming lane to make a turn, you should:
When loading paper rolls with eyes horizontal, which of the following is not a requirement for stacking a second layer?
Which of these is true about tire pressure?
What three distances build up the total stopping distance of your truck or bus?
When turning quickly in an emergency, which of the following applies:
The road you are driving on becomes very slippery due to glare ice. Which of these is a good thing to do in such a situation?
Which of these statements about brakes is true?
Using 7 miles per gallon as your fuel mileage and 8 pounds per gallon for the weight of fuel, how much total fuel weight will you burn off in 210 miles?
A combined Tank vehicle & hazardous material endorsement will be designated with what letter on the CDL?
A 30 minute break violation occurs on the below example. What day and time does the violation occur?
Day 1

Day 2
All of the following are classified as "a drink" and contain the same amount of alcohol except:
Given that general cargo securement requires a WLL of at least 50% of cargo weight, how many 1/2-inch Grade 70 chains would be required for a load of 34,500 lbs?
Cargo that isn't prevented from forward movement, and is 4 feet long and weighs 1,500 lbs requires a minimum of how many tiedowns?
When parked on the side of a two-lane road carrying traffic in both directions, place warning devices:
Working Load Limit (WLL)is defined as:
What violation occurs at 2:00 p.m. on this example?
What is the presumed resistance to horizontal movement of friction mats?
What kind of extinguisher should be used on burning paper, wood, or cloth?
What is the minimum number of tie-downs to be used on flatbed cargo?
During the vehicle inspection, checking of ___ will NOT prevent a fire.
Heavy vehicles often move slower than others. Which of these is NOT a good rule to follow while driving a heavy vehicle?
What violation has occurred at 8:00 a.m. on Day 2?
Day 1

Day 2
Which of the statements about an inspection of the suspension components is true?
You have steer tires rated at 6,150 pounds each, and you're in the state of West Virginia which says the legal limit for the steer axle is 20,000 pounds. What's the maximum legal weight you can carry on your steer axle in West Virginia?
You should try to avoid driving in fog:
Shifting gears on most heavy vehicles using manual transmissions will require: