Common Trick Questions and How to Avoid Them
By this point in the course you have covered the facts tested across all five ACS Areas of Operation: Regulations, Airspace, Weather, Loading and Performance, and Operations. This lesson is different from every lesson before it — it does not introduce new regulatory content. Instead it teaches how the Part 107 knowledge test tends to phrase questions about content you already know, and the specific reading habits that turn a question you actually know the answer to into one you miss anyway. Every worked example below reuses a real Part 107 fact from an earlier module; the goal here is entirely about recognizing the trap in the wording, not learning anything new about drones.
Why words like "always," "never," "must," "only" and "any" deserve a second look
An absolute qualifier is a word that leaves no room for an exception: "always," "never," "must," "only," "any," "all," "every." Because so much of aviation regulation is built around a general rule plus one or more carved-out exceptions, a real-world statement using an absolute qualifier is frequently — though not always — the wrong answer, because it is describing the general rule while ignoring an exception that the regulation itself provides. Test writers use this instinctively: a plausible-sounding blanket statement is an efficient way to test whether a candidate actually knows the exception, or only memorized the general rule in isolation.
The critical word in the paragraph above is "frequently," not "always" — notice the trap works both directions. Some Part 107 rules genuinely are absolute, with no exception anywhere in the regulation. Treating every absolute-sounding statement as automatically false is just as much a misreading as treating every absolute-sounding statement as automatically true. The skill being tested is not "distrust strong language" — it is "know whether this specific rule actually has an exception."
Worked example: a false absolute and a true absolute, side by side
False absolute: "A remote pilot may never operate a small UAS at night." This sounds authoritative, but it describes a rule that has not been current since April 2021. Under 14 CFR 107.29, night operations are permitted without a waiver, provided the small UAS is equipped with anti-collision lighting visible for at least 3 statute miles with a flash rate sufficient to avoid a collision hazard, and the remote pilot has completed the required recurrent training or testing that covers night operations. The word "never" is the hinge — it signals a rule that might have an exception, and here it does.
True absolute: "A remote pilot must always yield the right-of-way to a manned aircraft." This also uses an absolute qualifier, and here it is correct. 14 CFR 107.37(a) states that a small UAS must yield the right-of-way to all other aircraft, manned or unmanned, and to launch and reentry vehicles, with no carve-out. The lesson is not "reject the word 'always'" — it is "check whether the specific regulation this statement is describing actually has a carved-out exception, and only reject the statement if it does."
Why "which of the following is NOT required" trips people up
A negatively phrased question stem — "which of the following is NOT permitted," "which is NOT a requirement," "all of the following are true EXCEPT" — asks you to find the one false (or one true, in an EXCEPT stem) statement among several true (or false) ones. Under time pressure it is easy to skim past the capitalized "NOT" or "EXCEPT," read each answer choice as if the question were asking for the normal, positively phrased version, and select the first choice that sounds correct rather than the one that actually answers the question as written.
This mistake is purely a reading-comprehension trap, not a knowledge gap — a candidate who knows every fact perfectly can still miss a negatively phrased question by answering the question they expected to see rather than the one actually printed on the screen. Because the underlying facts are otherwise identical to a normal question, the fix is entirely a matter of technique rather than additional studying.
Worked example and the rephrase-as-positive strategy
Stem: "Which of the following is NOT a condition that must be met before a remote pilot may conduct Category 2 operations over people under 14 CFR Part 107 Subpart D?" Rather than scanning the four choices while still holding "NOT" loosely in mind, rewrite each choice into its own complete positive statement and ask "is this true?" for each one individually: (A) "The aircraft must not cause injury to a human being that exceeds the injury severity limit" — true, this is a real Category 2 condition. (B) "The aircraft must not have any exposed rotating parts that could lacerate human skin" — true, also a real condition. (C) "The remote pilot must hold an airworthiness certificate for the aircraft" — false; an airworthiness certificate is the Category 4 condition, not Category 2. (D) "The manufacturer must have submitted a means-of-compliance declaration" — true, also a real Category 2 condition. Because the question asked for the one that is NOT a requirement, (C) is the correct choice, precisely because it is false as a standalone statement.
Writing out each choice as its own true/false sentence, physically or mentally, before comparing them to each other converts a negative question back into four ordinary true/false checks — the exact skill you already use on every other question on the test.
Why an old, no-longer-current rule makes such a convincing wrong answer
Part 107 has changed substantially since it first took effect in 2016. The most significant recent changes are the April 2021 final rule that replaced the original waiver-only framework for night operations and operations over people with the current default-permitted-with-conditions framework, and the Remote Identification (Remote ID) rule, for which full compliance has been required since March 2024. Because these older frameworks were real, official FAA rules for years, they show up constantly in outdated study material, older instructor notes, and casual conversation among pilots who certificated years ago and never updated their mental model. That makes a superseded rule an unusually convincing wrong answer choice: it is not a made-up distractor, it is a genuinely true statement — just true about a version of Part 107 that no longer exists.
The test is written against the CURRENT regulation as of the exam date, not the history of how the regulation got there. A distractor built from an old rule is testing whether a candidate's mental model has actually been updated, or whether it is still running on an outdated version of Part 107 picked up from an old forum post or a friend who certificated in 2018.
Worked examples: night operations and Remote ID, then and now
Then: "A remote pilot must obtain a Part 107 waiver before conducting any operation at night." This was true before April 2021, when night flight required a waiver under the original rule. Now: since April 2021, a waiver is not required for night operations; 14 CFR 107.29 permits night flight by default provided the anti-collision lighting and training conditions are met. A question offering the old waiver requirement as a choice is testing whether you know the rule changed, not just whether you can recite a fact that used to be true.
Then: "Remote ID equipment is not yet required for Part 107 operations." This was defensibly true during the transition period before enforcement began. Now: compliance with the Remote ID rule has been required since March 2024 — a small UAS operated under Part 107 must broadcast standard Remote ID message elements, use a Remote ID broadcast module, or operate exclusively within an FAA-Recognized Identification Area (FRIA), as covered in Module 12. A choice describing Remote ID as optional or not-yet-required is a superseded-rule distractor, correct only as history.
Why the test likes to swap in a real number from a different rule
Part 107 uses several numeric thresholds, and a distractor built from a real number that belongs to a different rule is one of the most reliable ways to test whether a candidate has attached each number to its correct governing rule, rather than just memorizing a list of digits. A candidate who has memorized "400," "0.55," and "55" as isolated facts, without a clear sense of what each number actually measures and which regulation it comes from, is exactly the candidate this distractor style is designed to catch.
The fix is not to memorize more numbers — it is to always attach every number to the specific rule and purpose it governs, so that when a distractor offers a real but misapplied number, it stands out immediately as answering a different question than the one being asked.
Worked example: 400 feet AGL versus 400 feet above a structure
Under 14 CFR 107.51(b)(1), the general altitude limit for small UAS operations is 400 feet above ground level (AGL). Under 107.51(b)(2), a separate structure exception allows a small UAS to fly higher than 400 feet AGL when it remains within a 400-foot radius of a structure, provided the aircraft does not fly more than 400 feet above the structure's immediate uppermost limit. Both numbers are "400 feet," but they measure two different things: one is a flat ceiling above the ground everywhere, the other is a conditional bonus altitude tied specifically to the height of a nearby structure. A question describing a drone flying 550 feet AGL next to a 300-foot radio tower, well within 400 feet laterally of the tower, is testing whether you recognize that 550 feet is legal here (300 feet of structure height plus up to 400 feet more equals up to 700 feet permitted at that location) — not whether you can recite "400 feet" as a single flat number.
Worked example: 0.55 lb (250 g) versus 55 lb (25 kg) — a decimal-point trap
The 0.55 lb (250 g) figure appears in two places: it is the weight below which a recreational flier is exempt from FAA aircraft registration under 14 CFR Part 48, and it is also the weight ceiling for Category 1 operations over people under Subpart D (an aircraft weighing less than 0.55 lb, including everything on board and attached, with no exposed rotating parts capable of lacerating human skin, qualifies for Category 1). The 55 lb (25 kg) figure is a completely different threshold: 14 CFR 107.3 defines a "small unmanned aircraft" as one weighing less than 55 lbs on takeoff, including everything on board or attached — this is the outer weight limit for an aircraft to be regulated under Part 107 at all. A question that offers "55 lb" as the Category 1 weight ceiling, or "0.55 lb" as the maximum weight Part 107 covers, is relying entirely on a misplaced decimal point to look plausible. Reading the number back out loud as "zero point five five" versus "fifty-five" during review is a simple habit that catches this trap every time.
The six trick-question patterns covered in this lesson, each shown with a short contrasting example of the trap and the correct read.
View LargerWhen more than one answer choice is technically true
Some Part 107 knowledge test questions are written so that two or more answer choices are each defensibly true in isolation, but only one is the most complete or precise match to the regulation's own language and intent. This style is not a trick in the sense of a hidden falsehood — every remaining choice really is accurate as far as it goes — it is a test of precision: does the candidate know the regulation well enough to recognize which true statement is the fullest, most exact description of the rule, rather than a partial or looser paraphrase of it?
The reliable strategy here is to mentally compare each true-sounding choice against the actual wording of the regulation it is describing, and select the choice that most closely tracks that wording rather than the choice that is merely consistent with it. A choice that captures the complete condition beats a choice that captures only part of the condition, even when both are technically accurate.
Worked example: describing the VLOS requirement
Stem: "What best describes the visual-line-of-sight requirement for a Part 107 operation?" (A) "The remote pilot must be able to see the aircraft" is true but incomplete — it omits who may satisfy the requirement and what "see" actually means in the regulation. (B) "The remote pilot in command, the person manipulating the flight controls, or a visual observer must be able to see the unaided small UAS (corrective lenses excepted) with vision sufficient to know its location, determine its attitude, and see other aircraft or hazards well enough to maintain separation" is also true, and is a far more complete restatement of the actual VLOS requirement covered in Module 2. Both choices describe a true fact; (B) is the "best" answer because it matches the full scope of the regulation rather than a partial slice of it.
Why a realistic fact pattern can feel like it has too many relevant rules
A scenario question describes a realistic operation with several details at once — time of day, location relative to airspace, nearby structures, altitude, aircraft weight — deliberately, because a real flight always has several rules potentially in play simultaneously. The skill being tested is not whether you know any single rule; it is whether you can read the fact pattern, identify which specific detail actually triggers a requirement in this scenario, and set aside the rules that sound relevant but are not actually the ones the question is asking about. Multiple rules can genuinely all apply to one real flight at once — the scenario question usually asks about one specific outcome, and only one of the facts given is the one that determines that outcome.
The practical approach is to list, mentally or on scratch paper, every rule the scenario touches, and then check each one against the specific facts given to see whether it is actually triggered here, rather than assuming it applies just because the topic is mentioned.
Full worked scenario: commercial photography near a Class D boundary at dusk
Scenario: a remote pilot is hired to photograph a property for a real estate client. The operation occurs 30 minutes after sunset, at 300 feet AGL, with the aircraft's flight path remaining entirely 400 feet outside the lateral boundary of the surface area for a nearby Class D airport, and there are no structures near the flight path. Which single requirement governs whether this operation may proceed as planned?
Working through the facts one at a time: the altitude (300 feet AGL) is under the 400-foot general limit of 107.51(b)(1), so the altitude rule is satisfied and is not the controlling issue here. The aircraft never enters the Class D surface area described in Module 3 — the flight remains 400 feet outside its lateral boundary — so the requirement to obtain ATC authorization before operating within Class D airspace, covered in Module 3's airspace-authorization lessons, is not triggered by this scenario, even though Class D airspace is mentioned prominently in the stem. The one fact that is actually operative here is the time: 30 minutes after sunset falls within the civil twilight and night window covered in Module 14, which means the operation is a night operation and 14 CFR 107.29's anti-collision lighting and training requirements are the rule that actually governs whether this flight may legally proceed. The Class D detail in the stem is real and worth noticing, but in this particular fact pattern it is not the controlling rule — it is there to test whether the candidate can tell the difference between "airspace is mentioned" and "airspace authorization is actually required here."
| Number | What it actually governs | Commonly confused with | Regulation |
|---|---|---|---|
| 400 ft AGL | General maximum altitude for small UAS operations, measured above ground level | A raw MSL altitude printed on a chart, or the separate structure-exception allowance | 14 CFR 107.51(b)(1) |
| 400 ft above a structure | Additional altitude allowed only while remaining within 400 ft laterally of a qualifying structure | Treated as if it raised the flat 400-foot AGL ceiling everywhere, not just near the structure | 14 CFR 107.51(b)(2) |
| 0.55 lb (250 g) | Recreational-flier registration exemption weight, and the Category 1 weight ceiling for operations over people | The 55 lb (25 kg) sUAS definition weight limit, due to the decimal point | 14 CFR Part 48; 14 CFR Part 107 Subpart D (Category 1) |
| 55 lb (25 kg) | Maximum takeoff weight, including everything on board or attached, for an aircraft to qualify as a "small unmanned aircraft" under Part 107 at all | The 0.55 lb (250 g) registration/Category 1 threshold, due to the decimal point | 14 CFR 107.3 |
| MSL altitude | Height above mean sea level, the reference used for altitudes printed on a sectional chart | AGL, when applying the 400-foot altitude rule, which is always measured from the ground directly below the aircraft, not from sea level | Chart labeling convention; see Module 4 |
A process for approaching a tricky question
Work through these steps in order on any question that feels harder than it should, whether or not you can immediately spot which trick pattern is in play.
Read the full stem before looking at any answer choice
Read the entire question stem first, including every fact given in a scenario, before letting your eyes move to the answer choices. Jumping to the choices early primes you to look for a familiar-sounding phrase rather than to actually answer the question being asked.
Identify the hinge word
Look for a single word doing most of the work in the stem: "always," "never," "must," "only," "any," "NOT," "EXCEPT," "best," or "most correct." Identifying the hinge word tells you which of the six patterns in this lesson you are dealing with before you evaluate a single answer choice.
Do not eliminate an absolute-sounding choice automatically
If the hinge word is an absolute qualifier, ask specifically whether the regulation it describes actually has a known exception. Eliminate the choice only if you can name the exception; if you cannot name one, the absolute statement may be correct as written.
Rephrase a negatively worded question as a positive statement per choice
For a "NOT" or "EXCEPT" stem, restate each answer choice as its own complete true-or-false sentence before comparing the choices to each other, then select based on which restated sentence answers what the stem actually asked for.
Watch for a number that belongs to a different rule
Whenever a choice includes a specific number, silently name the rule and unit that number belongs to before accepting it. A distractor is often a real, correctly stated number attached to the wrong rule.
In a scenario, isolate which fact actually controls the outcome asked about
List every rule the scenario touches, check each one against the specific facts given, and select the answer built on the one fact that actually determines the outcome the question asks about — not every rule that happens to be mentioned.
Pick the most complete, most precise true answer
When more than one choice is technically true, select the one that most fully and precisely matches the regulation's own language and scope, rather than a choice that is merely consistent with it.
| Mistake | Why it happens | Correct approach | Pattern |
|---|---|---|---|
| Assuming any "always" or "never" statement must be false | Absolute qualifiers are frequently used to test exceptions, so test-takers over-generalize the pattern | Reject an absolute statement only if you can name the specific exception; some Part 107 rules, like right-of-way, truly are absolute | 107.29; 107.37(a) |
| Answering the positively phrased version of a NOT/EXCEPT question | Skimming under time pressure causes the capitalized qualifier to get lost | Restate each choice as its own true/false sentence before comparing choices, so the negative framing cannot be skipped over | Test technique |
| Selecting a plausible but outdated rule as current | Older study material, forum posts, and pre-2021/2024 habits are still circulating and sound authoritative | Confirm every rule choice reflects the current regulation as of today, not a historical version, especially for night operations, operations over people, and Remote ID | 107.29; Subpart D; Part 89 (Remote ID) |
| Confusing a number from one rule with a similar-sounding number from another | Numbers are often memorized as isolated digits without their governing context attached | Attach every number to its specific regulation and unit before accepting it as the answer to a given question | 107.51(b); 107.3; Part 48 |
| Picking the first technically true choice instead of the most complete one | "Best" and "most correct" questions can have more than one defensibly true option | Compare each true choice against the regulation's own full wording and select the one that matches it most completely | ACS answer-precision style |
| Applying every rule mentioned in a scenario instead of the one that actually controls | A realistic scenario deliberately mentions several facts that each sound relevant | Check each rule the scenario touches against the specific facts given, and answer based on the one fact that actually determines the asked-about outcome | Scenario-based question style |
Does guessing hurt my score on the Part 107 knowledge test?
No. The FAA knowledge test does not deduct points for an incorrect answer, so there is no such thing as a "safe" blank. Always select an answer for every question, even a pure guess after eliminating what you can, rather than leaving anything unanswered.
Are trick questions unfair?
Not really — they are testing precise understanding of exceptions, current rules, and exact regulatory scope rather than surface-level memorization. Every pattern in this lesson is answerable using facts already covered earlier in this course; none of them require outside knowledge, only careful reading of what is actually being asked.
Is an absolute-sounding answer choice always wrong?
No. Some Part 107 rules genuinely are absolute with no exception, such as the requirement to yield the right-of-way to all other aircraft under 107.37(a). Treating every strongly worded choice as automatically false is its own mistake — check for a specific, nameable exception before rejecting it.
How do I know if a rule I remember is current or superseded?
The two biggest recent changes are the April 2021 rule that made night operations and operations over people permitted by default (rather than waiver-only), and the Remote ID rule, in full compliance effect since March 2024. If a study fact you remember describes a waiver requirement for night flight or operations over people, or describes Remote ID as optional, it is describing a rule that is no longer current.
What should I do if two answer choices both look true?
Compare each true-sounding choice against the actual wording and full scope of the regulation it describes, and select the one that most completely and precisely matches it, rather than a choice that is merely a partial or looser restatement of the same rule.
Test Your Knowledge
Answer the questions below to check your understanding. Every answer can be found in the lesson above.