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.
Which of these is not part of the pre-trip inspection of the engine compartment?
2.
Which of these is NOT a good thing to do when driving on slippery roads?
3.
Which of these statements about managing space to the sides is true?
4.
You are driving a 40-foot vehicle at 35 mph. The road is dry, and visibility is good. What is the least amount of space you should keep in front of your vehicle to be safe?
5.
Weight transmitted to the ground by one axle or one set of axles called:
6.
A stack of shortwood loaded lengthwise can be secured with one tiedown if:
7.
Using radar detectors in commercial vehicles:
8.
Why is damage to the exhaust system a danger?
9.
Snow and ice must be removed from the radiator because otherwise:
10.
What is the minimum Working Load Limit for the entire securement system?
11.
A tank vehicle endorsement is required to drive tank vehicles with a combined capacity of:
12.
The distance that you should look ahead of your vehicle while driving amounts to about ___ miles at normal highway speed.
13.
What factor has the greatest affect on how much weight is moved per hole in the tandem slider rail?
14.
While driving, ice builds up on your wipers and they no longer clean the windshield. You should:
15.
Space to the ____ your vehicle is most important to manage.
16.
All of the following should be part of the engine compartment check except:
17.
When should you test your parking brakes?
18.
A chock is defined as:
19.
Backing into a space that is to the right rear of your vehicle is referred to as:
20.
How many violations have occurred on the below log?
21.
In what circumstance can shortwood be treated as longwood?
22.
What types of freight need to be secured properly?
23.
What is the main factor that will limit how far back you can slide your tandems?
24.
How does the weight of the vehicle affect stopping distance?
25.
Which of these is a good thing to do when steering to avoid a crash?
26.
Which of the following is not a requirement of wood used as blocking or bracing?
27.
In a pressurized cooling system, coolant level should be checked:
28.
Aggregate Working Load Limit is defined as:
29.
When vehicles towing trailers go into a drive-wheel skid, the trailer can push the towing vehicle sideways, causing a:
30.
Your log must include all of the following except:
31.
Based on the following figures, how much fuel can you legally add while remaining legal on the drive axles?

Percentage of fuel weight to drive axles: 30%

Weight Before Fueling: Steer: 11,275, drives: 33,750, gross: 77,220

32.
Mirror adjustment can only be checked accurately when:
33.
Containerized loads:
34.
Which of these statements about vehicle fire is true?
35.
What is aggregate working load limit?
36.
Some causes of fuel fires include improper fueling, driver smoking, and:
37.
Low-beam headlights generally light to a distance of:
38.
Using the following numbers, what would be the final result if you moved the 5th wheel forward two holes?

steer axle: 10,800 pounds
drive axles: 34,100 pounds
Weight transfer: 500 pounds per hole
39.
What is bell pipe concrete?
40.
A container chassis vehicle, by definition, is:
41.
To avoid being blinded by glare when driving at night, drivers should:
42.
How much space in front of you is needed while driving on a highway?
43.
When starting down a hill, instead of using the foot brakes to control speed:
44.
You should avoid driving through deep puddles or flowing water. But if you must, which of these steps can help to keep your brakes working?
45.
When securing a paper roll with a width that is more than twice its diameter, which of the following is not an acceptable method of securement to prevent tipping?
46.
The definition for "shortwood" identifies pieces that are no longer than:
47.
Which log below contains at least one violation?
Day 1

Day 2
48.
Most good drivers will look ahead:
49.
There will be times when you must take a minimum of a 30 minute break off duty before performing which of the following tasks?
50.
When securing paper rolls with friction mats as a primary method: