Ground control says, “Taxi to Runway 27 via Alpha, hold short Runway 18.” The diagram shows Alpha crosses Runway 18. What must the pilot do?
A. Cross Runway 18 because the destination runway is 27
B. Stop before the Runway 18 hold-short marking and obtain an explicit crossing clearance before proceeding
C. Stop only if an aircraft is visible on Runway 18
D. Read back only “Runway 27” and continue
Show answer and reasoning
Correct answer: B. Stop before the Runway 18 hold-short marking and obtain an explicit crossing clearance before proceeding
The clearance contains an explicit hold-short instruction. The pilot must stop at the Runway 18 holding-position marking and may not cross that runway until ATC issues and the pilot understands a specific crossing clearance.
- A: A taxi clearance to another runway does not authorize crossing a runway named in a hold-short instruction.
- C: The clearance applies regardless of whether traffic is visible.
- D: Runway hold-short instructions require a complete readback and compliance.
Source: AIM Chapter 4, runway crossing clearances and hold-short instructions
The supplied sign has a red background with white inscription “15-33.” What does it identify?
A. A destination sign pointing to Runways 15 and 33
B. A taxiway-location sign
C. A mandatory runway holding position for Runway 15-33
D. An ILS critical-area boundary only
Show answer and reasoning
Correct answer: C. A mandatory runway holding position for Runway 15-33
Red signs with white inscriptions are mandatory-instruction signs. A runway designation on that sign marks the holding position for the identified runway; the pilot must not proceed without the required authorization.
- A: Destination signs use yellow inscriptions on black backgrounds with arrows.
- B: Taxiway-location signs use yellow characters on black.
- D: An ILS critical-area sign contains an ILS designation rather than only runway numbers.
Source: AIM Chapter 2, airport signs: mandatory instruction signs
A pilot calls a Class C approach facility: “Metro Approach, Skyhawk 123AB, ten miles east.” ATC replies, “Aircraft calling Metro, standby.” May the pilot enter Class C?
A. Yes, because any ATC reply establishes communication
B. No; ATC has not used the aircraft identification, so two-way communication is not established
C. Yes, if the transponder shows altitude
D. No, because VFR aircraft are never permitted in Class C
Show answer and reasoning
Correct answer: B. No; ATC has not used the aircraft identification, so two-way communication is not established
For Class C entry, two-way radio communication must be established. A reply that does not include the aircraft call sign or identification does not establish it; the pilot must remain outside until ATC responds using that identification.
- A: A generic response deliberately omitting the aircraft identification is insufficient.
- C: Altitude reporting equipment does not replace the communication requirement.
- D: VFR aircraft may operate in Class C when requirements are met.
Source: AIM Chapter 3, Class C two-way radio communications before entry
Why must an airplane's fuel tank vent remain unobstructed?
A. It replaces consumed fuel with air so pressure does not restrict fuel flow
B. It increases fuel octane during climb
C. It measures fuel quantity for the cockpit gauge
D. It prevents all fuel vapor formation
Show answer and reasoning
Correct answer: A. It replaces consumed fuel with air so pressure does not restrict fuel flow
As fuel leaves a tank, air must enter to replace its volume. A blocked vent can create a partial vacuum, reduce or stop fuel flow, and cause fuel starvation even when usable fuel remains.
- B: Venting does not change fuel octane.
- C: Fuel quantity is sensed by the gauge system, not measured by the vent.
- D: Venting manages tank pressure but cannot prevent all vapor formation.
Source: Chapter 7, fuel systems: tank vents
Given METAR KDEN 121653Z 02012G22KT 3/4SM SN BKN008 OVC015 M04/M06 A2992, what ceiling and prevailing visibility are reported?
A. 1,500 feet AGL and 3 statute miles
B. 800 feet AGL and three-quarter statute mile
C. 800 feet MSL and 6 statute miles
D. No ceiling and three-quarter nautical mile
Show answer and reasoning
Correct answer: B. 800 feet AGL and three-quarter statute mile
BKN008 is the lowest broken or overcast layer and therefore establishes an 800-foot AGL ceiling. The visibility group 3/4SM reports three-quarter statute mile. OVC015 is a higher layer and does not replace the lower broken ceiling.
- A: The 1,500-foot overcast layer is not the lowest ceiling layer, and visibility is not 3 miles.
- C: METAR cloud heights are reported in hundreds of feet AGL, and the visibility is not 6 miles.
- D: Broken cloud cover constitutes a ceiling, and SM denotes statute miles.
Source: METAR chapter, visibility and sky-condition groups
