Conditions and concepts
A supplied METAR wind group gives true direction and speed inknots; Gintroduces gust speed. Compute gust increment as gust minus sustained speed. A small temperature–dewpoint spread can indicate conditions favorable to saturation. The supplied spread calculation is temperature minus dewpoint. In a METAR cloud-height group, the three digits give hundreds of feet above ground level. A broken or overcast layer can define a ceiling. Ordinary Part 107flight visibility observed from the control station is at least3 statute miles, absent an applicable waiver.
Worked decisions
An original weather-code exercise gives wind 18012G20KT. What is the gust increase above sustained speed? Subtract the quantities on the same reference: 20 − 12 = 8 knots. Adding the values would combine the reference with the difference instead of measuring the requested separation. The supported result is 8 knots. An original weather exercise reports temperature20 C and dewpoint18 C. What is the spread? Subtract the quantities on the same reference: 20 − 18 = 2 C. Adding the values would combine the reference with the difference instead of measuring the requested separation. The supported result is 2 C. An original decoding exercise includes BKN008. What base height does that group indicate? Multiply the stated rate or scale factor: 8 × 100 = 800 ft AGL. Keep the per-item or height-code multiplier; using only one factor omits the requested scaling. The supported result is 800 ft AGL. Observed flight visibility from the control station is 2 statute miles. No applicable waiver is held. Which visibility comparison fits? Ordinary Part 107flight visibility observed from the control station is at least3 statute miles, absent an applicable waiver. The supported result is It is below the ordinary minimum.
A change that matters
An original weather-code exercise gives wind 24015G25KT. What is the gust increase above sustained speed? Subtract the quantities on the same reference: 25 − 15 = 10 knots. Adding the values would combine the reference with the difference instead of measuring the requested separation. Here choose 10 knots. An original weather exercise reports temperature15 C and dewpoint10 C. What is the spread? Subtract the quantities on the same reference: 15 − 10 = 5 C. Adding the values would combine the reference with the difference instead of measuring the requested separation. Here choose 5 C. An original decoding exercise includes BKN012. What base height does that group indicate? Multiply the stated rate or scale factor: 12 × 100 = 1200 ft AGL. Keep the per-item or height-code multiplier; using only one factor omits the requested scaling. Here choose 1200 ft AGL. Observed flight visibility from the control station is 3 statute miles. No applicable waiver is held. Which visibility comparison fits? Ordinary Part 107flight visibility observed from the control station is at least3 statute miles, absent an applicable waiver. Here choose It is at the ordinary minimum.
Transfer check and reasoning
A coded layer is BKN015 and visibility at the control station is 2 statute miles. What two separate facts have been decoded? The broken-layer base is 1500 ft AGL, but flight visibility is below the ordinary3-statute-mile minimum. A cloud-base number does not cure a visibility shortfall.
An original weather-code exercise gives wind 18012G20KT. What is the gust increase above sustained speed?
- The relevant case condition is: An original weather-code exercise gives wind 18012G20KT.
- Subtract the quantities on the same reference: 20 − 12 = 8 knots. Adding the values would combine the reference with the difference instead of measuring the requested separation.
- Therefore choose “8 knots”. The alternatives must be tested against that same stated condition; an unrelated document, unit or approval cannot supply a missing requirement.
Compare the other answer choices
The proposed choice “20 knots” does not follow from the given conditions. Subtract the quantities on the same reference: 20 − 12 = 8 knots. Adding the values would combine the reference with the difference instead of measuring the requested separation.
The proposed choice “12 knots” does not follow from the given conditions. Subtract the quantities on the same reference: 20 − 12 = 8 knots. Adding the values would combine the reference with the difference instead of measuring the requested separation.
The proposed choice “32 knots” does not follow from the given conditions. Subtract the quantities on the same reference: 20 − 12 = 8 knots. Adding the values would combine the reference with the difference instead of measuring the requested separation.
Try it, then explain it.
Complete a short set without looking at the example. After each answer, explain which evidence or rule supports your decision and why the alternatives do not fit.
Sources & authorship
Original Slope explanations and examples. References support the concepts; they are not the source of copied questions. Independent educator review is pending.
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