객관식 4지선다형, 5문항(2021.05.16)
교통안전공단 비행이론 학과시험 형식
1. soft field takeoff, short field takeoff 의 방법으로 맞는 것은?
1) soft field takeoff 시 지상활주 시작부터 조종간을 당겨야(back-elevator pressure) 한다.
2) soft field takeoff 시 지상활주 시 최대 상승각 속도(Vx)에 도달시 조종간을 당겨야(back-elevator pressure) 한다.
3) short filed takeoff 시 지상활주 시작부터 조종간을 당겨야(back-elevator pressure) 한다.
4) short filed takeoff 시 지상활주 시 최대 상승율 속도(Vy)에 도달시 조종간을 당겨야(back-elevator pressure) 한다.
2. 지시대기속도(INDICATED AIRSPEED)에서 계기오차와 장착오차를 수정한 속도는?
1) 수정대기속도(CALIBRATED AIRSPPED)
2) 진대기속도(TRUE AIRSPEED)
3) 등가대기속도(EQUIVALENT AIRSPEED))
4) 대지속도(GROUND SPEED)
3. 밀도고도가 증가되는 상황은?
1) 습도가 감소한다.
2) 온도가 증가한다.
3) 기압이 증가한다.
4) 고도가 감소한다.
4. EIGHT on PYLON(PYLON EIGHT)에서 PIVOTAL 고도는 무엇에 직접적인 영향을 받는가?
1) GROUND SPEED
2) TRUE AIRSPEED
3) PYLON 으로부터의 거리
4) BANK 량
5. 조종면과 반대로 움직이며 조종 압력(control pressure)을 경감해주는 장치는?
1) 트립탭 (trim tab)
2) 플랩(flap)
3) 스포일러(spoiler)
4) 안정판(stabilizer)
정답 및 해설
1. 답: 1)
* Airplane Flying Handbook, FAA-H-8083-3B, Chapter 5: Takeoffs and Departure Climbs
- Short-Field Takeoff and Maximum Performance Climb, Lift-Off
As VX approaches, the pilot should apply back-elevator pressure until reaching the appropriate VX attitude to ensure a smooth and firm lift-off, or rotation.
- Soft/Rough-Field Takeoff and Climb, Takeoff Roll
As the airplane is aligned with the takeoff path, the pilot should apply takeoff power smoothly and as rapidly as the powerplant can accept without faltering. As the airplane accelerates, the pilot should apply enough back-elevator pressure to establish a positive AOA and to reduce the weight supported by the nose-wheel.
2. 답: 1)
암튼 정답임.
3. 답: 2)
* Pilot’s Handbook of Aeronautical Knowledge, FAA-H-8083-25B, Chapter 5: Aerodynamics of Flight
- Density Altitude
Air density is affected by changes in altitude, temperature, and humidity. High density altitude refers to thin air, while low density altitude refers to dense air. The conditions that result in a high density altitude are high elevations, low atmospheric pressures, high temperatures, high humidity, or some combination of these factors. Lower elevations, high atmospheric pressure, low temperatures, and low humidity are more indicative of low density altitude.
4. 답: 1)
* Airplane Flying Handbook, FAA-H-8083-3B, Chapter 6: Ground Reference Maneuvers
- Eights-on-Pylons
The pivotal altitude is the altitude at which, for a given groundspeed, the projection of the visual reference line to the pylon appears to pivot. [Figure 6-12] The pivotal altitude does not vary with the angle of bank unless the bank is steep enough to affect the groundspeed.
5. 답: 1)
* Pilot’s Handbook of Aeronautical Knowledge, FAA-H-8083-25B, Chapter 6: Flight Controls
-Trim Tabs
In spite of the opposing directional movement of the trim tab and the elevator, control of trim is natural to a pilot. If the pilot needs to exert constant back pressure on a control column, the need for nose-up trim is indicated. The normal trim procedure is to continue trimming until the aircraft is balanced and the nose-heavy condition is no longer apparent. Pilots normally establish the desired power, pitch attitude, and configuration first, and then trim the aircraft to relieve control pressures that may exist for that flight condition. As power, pitch attitude, or configuration changes, retrimming is necessary to relieve the control pressures for the new flight condition.
