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.
When is the driver responsible for inspecting cargo and securing devices?
2.
Which of these is NOT something you should do if your headlights are not working properly?
3.
What violation has occurred on the below log?

4.
Which of these pieces of emergency equipment should always be carried in your vehicle?
5.
When a driver stops and reverses direction to get a better position during the driving exam, it is considered a(n):
6.
The primary cause of fatal crashes is:
7.
The BAC (Blood Alcohol Concentration) for commercial drivers to be considered intoxicated when driving a commercial vehicle is:
8.
Which statement is true about extending the 14 hour on duty clock by using the 8 hour sleeper berth provision?
9.
When securing an intermodal container on a chassis, what is the maximum allowable vertical travel when secured?
10.
To test for leaks on hydraulic brake systems:
11.
In cargo securement, what is a 'cleat' defined as?
12.
When securing a load of lengthwise longwood logs weighing 42,500 lbs, what is the minimum aggregate WLL required for tiedowns? (rounded up to nearest lb)
13.
Concrete pipe loaded crosswise generally:
14.
Escape ramps on downgrades:
15.
Besides prescription drugs verified by a doctor as safe for driving, what other drugs are acceptable while driving?
16.
How many on duty hours are remaining after the following has been logged (use a scratch sheet of paper if you need to):
- On duty/not driving: 3 hours
- Driving: 4 hours
- Sleeper berth: 8 hours
- Driving: 7 hours
- Off duty: 2 hours
17.
Why should drivers always be looking for hazards?
18.
The principal way of controlling speed on downgrades is:
19.
Which of the following are not a primary factor affecting weight distribution across the axles?
20.
You are starting your vehicle in motion from a stop. As you apply power to the drive wheels, they start to spin. You should:
21.
A cleat is a short piece of wood used:
22.
How many violations occur on the below example?
Day 1

Day 2
23.
What is the most important reason to inspect your truck or bus?
24.
It is accepted that friction mats provide a resistance to horizontal movement equal to:
25.
Medicine used to treat the common cold:
26.
Circumstances that would make wheels and rims unsafe include the following except:
27.
A sided vehicle containing cargo weighing 35,980 lbs must be able to withstand a rearward force of at least:
28.
Banding is:
29.
If you cannot see the driver of a vehicle, then:
30.
Using controlled braking, brakes are applied as hard as possible:
31.
Is the below example a completed 34 hour restart?
Day 1

Day 2
32.
Which violations have occurred in the below example?
Day 1

Day 2
33.
In case you have to fight a fire, also aim the extinguisher:
34.
Gross combination weight (GCW) is:
35.
When exiting or entering on a curved freeway ramp, you should:
36.
Which vehicle will have the most difficulty staying in its lane during strong wind?
37.
How far should a driver look ahead of the vehicle while driving?
38.
If an oncoming vehicle drifts into your lane you should:
39.
The maximum allowable overall length for semitrailers is:
40.
Methods of securing building materials against forward motion include:
41.
Requirements for securing heavy vehicles, equipment, and machinery apply at what weight?
42.
You should stop driving:
43.
Convex (curved) mirrors:
44.
If you lose pressure in hydraulic brakes, you can:
45.
A driver will generally be required to have a DOT medical card in order to drive which of the following:
46.
"You do not have a hazardous materials endorsement on your commercials driver’s license. You are asked to deliver hazardous materials in a placarded vehicle. You should:"
47.
When securing a single metal coil with eyes vertical:
48.
A Class A CDL is required to drive a combination vehicle of over 26,001 lbs towing a vehicle weighing:
49.
The pre-trip inspection should show that the exhaust system is:
50.
Blocking is used to: