Free Idaho CDL General Knowledge Practice Test 2023

You are looking for an actual Idaho CDL practice test source for your coming CDL test? So you have come to the right place. Our ID General Knowledge Practice Test has the same questions as the real exam which is based on the Idaho CDL manual. Our test covers most of the subject areas on the Idaho 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 CDL practice test pack 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 ID commercial driver's license manual
Full answers + detailed explanations
Perfect for first-time, renewal applicants
ID CDL General Knowledge Test format:
50 questions
40 correct answers to pass
80% passing score
List of questions
Vehicle skids are often caused by:
Which of these is not part of the pre-trip inspection of the engine compartment?
Which of these statements about emergency steering is true?
When are helpers needed to back your vehicle?
Which of these is NOT a danger when an automatic transmission is forced into a low gear at a high speed?
Weight transmitted to the ground by one axle or one set of axles called:
When approaching a railroad crossing, which of these safety precautions applies?
Which of these is a good thing to remember when crossing or entering traffic with a heavy vehicle?
Making sure that the cargo is not overweight is the responsibility of:
How current must your logbook be?
Option #3 for securing metal coils transported with eyes lengthwise includes all of the following except:
Why is damage to the exhaust system a danger?
Why should drivers always be looking for hazards?
To prevent rolling, how many points of contact are required, at minimum, for a boulder resting on a rounded or partially rounded side?
Why should drivers avoid foreign objects in the road?
What is the most important reason to inspect your truck or bus?
Any operator who refuses to submit to drug or alcohol testing, or who tests in excess of the legal limits, will be disqualified for a minimum of:
Which of these statements about downshifting is true?
The bridge formula:
If you have a road emergency and must park on the shoulder, how soon should you put out your triangles?
Timber used for dunnage must be all of the following except:
Which of these statements about rear drive wheel braking skid is true?
In addition to preventing engine freezing, proper coolant levels help:
What is a cab shield?
If you are not sure what to use to put out a hazardous material fire you should:
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?
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?
Ways that drinking alcohol can affect the brain include:
In the following picture, what are axles 2 and 3 commonly referred to as?

A 30 minute break violation occurs on the below example. What day and time does the violation occur?
Day 1

Day 2
What is the minimum aggregate WLL of all tiedowns in a group of concrete pipe?
Which of the following has the greatest affect on the gross vehicle weight?
Which of these is true about radiator shutters and the winter-front during winter driving?
In Oregon, the maximum weight on the steer axle is listed as 600 pounds per inch of tire tread width up to 20,000 pounds. Your steer tires have a load rating of 6,150 pounds each and are 10 inches wide. What is the maximum legal weight your steer axle can carry in Oregon?
When securing metal coils in a sided vehicle without anchor points:
When parked on the side of a two-lane road carrying traffic in both directions, place warning devices:
Containerized loads:
What should you do when your vehicle hydroplanes?
When a tiedown is attached directly to the cargo, what is the ideal angle where it attached to the vehicle?
Coming down steep, long, downgrades will require a driver to:
While driving, the freight must not:
Which of these statements about staying alert to drive is true?
The value specified by the manufacturer as the loaded weight of a combination vehicle is?
What can be the result of too much weight on the back of the trailer?
Requirements for securing two stacks of shortwood loaded side-by-side include:
On what day and time does an 11 hour rule violation occur?
Day 1

Day 2

You receive a scale ticket and your drive axles are 35,400 and your trailer tandems are 31,100. Based upon the two most common tandem slider rail hole spacings, what is the minimum number of holes you would have to slide the tandems to get the weight legal, and in which direction?
Which day below contains a 30 minute break violation?
Day 1

Day 2
If you are able to exert 200 pounds of force against an object but you are only exerting 50 pounds of force to do so, what method are you applying to make this happen?
Specifically prohibited in the testing area are cellphones and: