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 can see a marking on a vehicle ahead of you. The marking is a red triangle with an orange center. What does the marking mean?
In case of tire failure, all of the following will be steps in your response except:
Tourists may be hazardous because?
When can your logbook be inspected?
You are checking your brakes and suspension system for a pre-trip inspection. Which of these statements is true?
Some general signs that another driver may be distracted include which of the following:
When using tiedowns to secure boulders, all of the following are requirements except:
When you encounter a driver that appears to be distracted, you should:
You are driving a vehicle that could be driven safely at 55 mph on an open road. But traffic is heavy and other vehicles drive at the speed of 35 mph, though the speed limit is 55 mph. The safest speed for your vehicle is more likely to be:
Which of the following is not a method of securing side-by-side cargo?
In cargo securement, a 'well' is defined as:
What is the minimum weight of a load of metal coils that requires specific securement practices?
Which of these are not part of the front pre-trip inspection?
When securing concrete pipe with a diameter up to 45 inches loaded crosswise as a group, a crosswise tiedown should be used every how many feet?
Based on the following figures, how much fuel can you legally add while remaining legal on the steer axle?

Load rating of steer tires: 6,150 pounds

Percentage of fuel weight to steer axle: 80%

Steer axle weight limit in states you're travelling: 20,000 pounds

Weight Before Fueling: Steer: 11,450, drives: 33,100, gross: 76,700

If you are driving while sleepy, the safest remedy is:
What happens if you spend 8 hours in the sleeper berth?
When securing concrete pipe with a diameter of more than 45 inches loaded crosswise, how many tiedowns are required through each pipe at minimum?
You should use your mirror to check?
When loading bell pipe on one tier, all of the following apply except:
Which day on the example below contains a violation?
Day 1

Day 2
What violation has occurred at 10:00 a.m. on Day 2?
Day 1

Day 2
Which of the following is not a requirement for shortwood loaded lengthwise?
"Fully Contained" means:
A tiedown with a marked WLL of 8,000 lbs directly attached to an article has an actual WLL of:
When confronted with an aggressive driver, you should do all of the following except:
If you need to leave the road in a traffic emergency, you should:
If you are not sure what to use to put out a hazardous material fire you should:
Gross Vehicle Weight Rating (GVWR) means the following?
When you are passing a vehicle, pedestrian, or bicycle you should assume that:
In case of a fire in the cargo area of a van or box trailer, you should:
If unsure of the exact location of the center of gravity of your cargo, where would you rather have the center of gravity located if you couldn't get it centered?
What day and time did a violation occur in the below example?
Day 1

Day 2
Combination vehicles must display license plates:
Some common causes of vehicle fires are spilled fuel, improper fueling, under-inflated tires, and:
Which of these is the proper signal to change lane?
To correct a drive wheel braking skid, you should:
What hours must your logbook show?
When backing, all of the following are important safety rules:
Which of these is NOT a danger of a rough acceleration?
Where in the trailer could you place cargo so that the weight applied to the trailer tandems is greater than the weight of the cargo itself?
All of the following are true of alcohol except:
A device placed on the exposed edge of an article to distribute tiedown forces over a larger area of cargo than the tiedown itself, to protect the tie-down and/or cargo from damage, and to allow the tiedown to slide freely when being tensioned is a:
HOS regulations were designed to do all of the following, except:
You should always turn on your emergency four-way flashers when you:
What is the minimum number of tiedowns to use on a load 4ft 7in long, and weighing 1,237 lbs?
As part of their pre-trip cargo securement inspection, drivers should:
Among other hazards, drivers should be on the lookout for slow or confused drivers, children, accidents, and:
Improperly loaded or secured cargo:
The pre-trip inspection should generally include how many steps?