Free Ohio 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 OH General Knowledge Practice Test has the same questions as the real exam which is based on the Ohio CDL Manual. Our CDL practice test pack covers most of the subject areas on the Ohio 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 Ohio 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 OH commercial driver's license manual
Full answers + detailed explanations
Perfect for first-time, renewal applicants
OH CDL General Knowledge Test format:
50 questions
40 correct answers to pass
80% passing score
List of questions
Vehicle skids are often caused by:
When using the brakes on a steep downgrade, which of the following applies?
When driving vehicles with ABS, braking:
What is the best way to prevent brake failure on long downgrades?
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?
A hazard:
You are inspecting hydraulic brakes. You should pump the brake pedal three times then apply firm pressure to the pedal for five seconds. If the brakes are working properly, the pedal should:
Which statement is true about extending the 14 hour on duty clock by using the 8 hour sleeper berth provision?
At what time does a violation occur on this log?
A stack of shortwood loaded lengthwise can be secured with one tiedown if:
Using 6 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 600 miles?
Which day below contains a violation?
Day 1

Day 2
You should lightly apply your brakes to flash the brake lights if:
You're in Illinois which allows up to 20,000 pounds on the steer axle. You're heading to Indiana which only allows 12,000 on the steer axle. Your steer tires have a load rating of 6,500 pounds each. What is the maximum legal weight your steer axle can be for each of the two states?
Which of these is true about hazardous materials:
In cargo securement, a wedge is defined as:
If your vehicle catches fire while you are driving, you should:
All of the following are considered excessive speeding except:
The principal way of controlling speed on downgrades is:
You receive a scale ticket and your drive axles are 35,700 and your trailer tandems are 30,600. Based upon a trailer with 4 inch slider rail hole spacings, what is the minimum number of holes you would have to slide the tandems to get the weight legal, and what would the final weights be?
In bad weather many drivers tailgate large vehicles. What should you do?
The maximum distance from the rear allowed for attaching mechanisms used to secure roll-on/roll-off containers is:
What is the 8 day / 70 hour on duty limit?
When loading paper rolls with eyes horizontal, which of the following is not a requirement for stacking a second layer?
If you need to leave the road in a traffic emergency, you should:
When activated, retarders apply braking power when:
When exiting or entering on a curved freeway ramp, you should:
Extra care is needed to keep your vehicle centered in your lane because commercial vehicles:
Drivers must have a CDL to legally drive:
Which statement is true?
A 30 minute break violation occurs on the below example. What day and time does the violation occur?
Day 1

Day 2
If you slide the 5th wheel toward the nose of the tractor, what will be the effect?
A tractor trailer traveling 55 mph will travel how far between when the brain perceives a hazard and stopping?
When using tiedowns for securing cargo, what is the general rule regarding cargo length.
Merging to the road is safest if you:
Can state inspectors inspect your truck or bus?
What hours must your logbook show?
When backing, all of the following are important safety rules:
If you have a heavy load that is slowing you down on an upgrade you should:
When entering and exiting an expressway, and also generally any time you drive, you should:
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:
Some causes of fuel fires include improper fueling, driver smoking, and:
While driving, the freight must not:
Some of the serious driving errors that can be caused by alcohol include:
Which of the statements about an inspection of the suspension components is true?
A Class A CDL is required to drive a combination vehicle of over 26,001 lbs towing a vehicle weighing:
Which of these is specifically prohibited when securing crushed or flattened vehicles?
Indirect tiedowns create what direction of force?
Specifically prohibited in the testing area are cellphones and:
What kind of extinguisher would you use to fight an electrical fire?