What the Class B General Knowledge Practice Test Actually Is
The Class B General Knowledge Practice Test is the study tool you use before taking the FAA commercial pilot airman knowledge test. It covers navigation, meteorology, aircraft systems, regulations, and weight and balance calculations. The official exam is 100 multiple-choice questions with a 90% passing score. That means you need to get at least 90 out of 100 right on test day. The practice test itself isn't an official FAA document. Any test prep provider—King Schools, Gleim, Sporty's, CAE Oxford—will sell you one. The real question is which one matches the actual FAA question bank well enough to matter.
Class B General Knowledge Practice Test: How to Use It Properly
Most people treat the practice test as a quiz. They answer questions, check their score, and move on. This is backwards. The practice test is supposed to be your diagnostic tool. You take it first to see what you don't know, then you study those weak areas, then you take it again. Repeat until you're consistently scoring 90% or above on every single attempt. I ran into a specific problem last year while prepping a student for their commercial checkride. We had been using a widely available practice test that happened to contain questions the FAA had already retired from the current question bank. The student was getting 95% on those old questions. Walked into the actual test and bombed a whole section on ATC procedures that nobody was studying because the retired questions didn't cover it. I switched us to the latest FAA-released question bank immediately. Cuts the gap between practice scores and real performance in half. Here's what most people miss about the actual test. Weight and balance isn't just a formula you memorize. The FAA will give you scenarios where you have to calculate weight with items placed at various stations, and they sometimes include baggage in non-standard locations. I once saw a question where a 40-pound battery was placed 85 inches aft of the datum on a taildragger, and the options were close enough that a wrong moment arm choice would flip your answer. You have to draw the airplane and label the stations before you start crunching numbers. It takes two minutes and saves you from guessing.
Another counter-intuitive thing: the test does not reward pure memorization of regulations. It rewards understanding why a regulation exists. When you see a question about Vmc or stall speed and the options are very close, the answer is almost always the one that reflects the underlying physics, not the one that's technically correct in a narrow edge case. The FAA writes questions to test whether you'd make the right call in the air, not whether you can recite the letter of the law.
Get the Full Details
Where to Find the Practice Test
There's no single official source you have to download from. The FAA publishes a question bank PDF called the Commercial Pilot Airman Certification Standards, and you can find it free on faa.gov under training and testing. Most prep courses bundle their questions into software that mimics the actual computer-delivered test format. If you want a free option, the FAA's own test supplement is as close to official as you're going to get. The paid programs tend to have better explanations for each answer. That matters. Reading why an answer is right is where the actual learning happens. On a $50 practice test course, you might save yourself 20 hours of aimless reading.
Known Limitations
Practice tests have real shortcomings. The biggest one is that they cannot replicate the pressure of the actual testing environment. The computer at the test center forces you through questions in 60 seconds per question on average. Practice tests usually let you linger. That gap shows up as time pressure on test day even when your knowledge is solid. Another issue: outdated content. The FAA updates its question bank roughly every six months. Any practice test that hasn't been updated in over a year is potentially harmful because it reinforces answers to questions that no longer appear. Always check the last update date on whatever resource you're using. If you find yourself consistently scoring below 75% on practice tests after three or four study attempts, the problem isn't the practice test. It's that your foundational knowledge has gaps no number of questions will fill. In that case, go back to a textbook or a ground school course instead of grinding more practice questions. More practice without filling the gaps just builds false confidence.
Bottom Line
Use the Class B General Knowledge Practice Test as a diagnostic, not a destination. Make sure your source is current. Understand the physics behind the answers rather than memorizing them. And if your scores aren't climbing, change your approach instead of doing the same thing again.
