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
Void filler is:
The center of gravity of a load:
You are driving on a clear night with your low beam lights on. If your headlights let you see about 250 feet ahead of you, you should adjust your speed so that you can stop within about _____ feet.
When is it necessary to learn how a fire extinguisher works?
When driving vehicles with ABS, braking:
Sometimes you need to leave a road to avoid a hazard or emergency. When you do, you should keep in mind, that:
Which of these statements about certain types of cargo is true?
Which of these is a good thing to do when driving at night?
Which statement is true about extending the 14 hour on duty clock by using the 8 hour sleeper berth provision?
When you change your duty status, you must document all of the following except:
If your brakes fail on a downgrade, you must first:
For your safety, when setting out reflective triangles you should:
When loaded cement pipe over 45 inches in diameter, which pipes should be blocked, wedged, or otherwise immobilized?
Which of these statements about drugs is true?
Cargo inspection:
The maximum number of "looks" allowed during the driving exam is:
Adding or burning off fuel will mainly change the amount of weight on which axles?
When securing concrete pipe with a diameter of more than 45 inches loaded crosswise, how many tiedowns are required through each pipe at minimum?
What does EOBR stand for?
Your brakes can get wet when driving through heavy rain. What can happen if the brakes are applied?
Drivers who have trouble sleeping at night, fall asleep at odd times, or snore loudly, gasp, and choke in their sleep should:
A load weighing 41,500 lbs requires securement against rearward force of:
In case you have to fight a fire, also aim the extinguisher:
A waterproof sheet used to cover cargo is a:
When loading paper rolls with eyes horizontal, which of the following is not a requirement for stacking a second layer?
"Fully Contained" means:
When driving at night you should use your high beams when oncoming traffic is not within ____ feet?
A tiedown with a marked WLL of 8,000 lbs directly attached to an article has an actual WLL of:
When activated, retarders apply braking power when:
You must park on a side of a level, straight, four-lane divided highway. Where should you place the reflective triangles?
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?
In order to perform the in-cab and gauge inspection, which of the following must be done?
Specific examples of vehicles which drivers should pay close attention to as possible hazards include:
Under the adverse driving conditions exception, how many additional hours can you drive?
To protect the area after an accident, steps you should take include:
Your vehicle has hydraulic brakes. While traveling on a level road, you press the brake pedal and find that it goes to the floor. Which of these statements is true?
When using tiedowns for securing cargo, what is the general rule regarding cargo length.
To correct a drive wheel braking skid, you should:
To avoid an accident you moved to the shoulder. The shoulder is clear, you should:
The basic control skills exam allows for a maximum of how many points scored?
The distance that you should look ahead of your vehicle while driving is about __ at low speed.
Using the following numbers, what would be the final result if you moved the 5th wheel back one hole?

steer axle: 12,300 pounds
drive axles: 33,100 pounds
Weight transfer: 500 pounds per hole
When securing a single metal coil with eye vertical, tiedowns must be arranged according the all of the following except:
Using the following numbers for your calculations, how much weight will come off your drive axles?

Miles per gallon: 6

Miles travelled: 360

Percentage of fuel weight on drive axles: 30%
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
Specific hazards to watch for when traveling through work zones include:
The definition for "shortwood" identifies pieces that are no longer than:
Where will the weight of fuel be distributed?
Which log below contains at least one violation?
Day 1

Day 2
When securing paper rolls with eyes vertical in a sided vehicle all of the following are acceptable except: