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IFR (Instrument Rating) Airman Knowledge Test Questions　2007

231.
A ceiling is defined as the height of the
A) highest layer of clouds or obscuring phenomena aloft that covers over 6/10 of the sky.
B) lowest layer of clouds that contributed to the overall overcast.
C) lowest layer of clouds or obscuring phenomena aloft that is reported as broken or overcast.

232.
A pilot reporting turbulence that momentarily causes slight, erratic changes in altitude and/or attitude should report it as
A) light turbulence.
B) moderate turbulence.
C) light chop.

233.
SIGMET's are issued as a warning of weather conditions potentially hazardous
A) particularly to light aircraft.
B) to all aircraft.
C) only to light aircraft operations.

234.
(Refer to figure 9.) What type of thunderstorm activity is expected over Montana on April 4th at 0800Z?
A) General.
B) None.
C) A slight risk of severe thunderstorms.

235.
(Refer to figure 9.) The Severe Weather Outlook Chart, which is used primarily for advance planning, provides what information?
A) An 18-hour categorical outlook with a 48-hour valid time for severe weather watch, thunderstorm lines, and of expected tornado activity.
B) A preliminary 12-hour outlook for severe thunderstorm activity and probable convective turbulence.
C) A 24-hour severe weather outlook for possible thunderstorm activity.

236.
Maximum downdrafts in a microburst encounter may be as strong as
A) 8,000 feet per minute.
B) 7,000 feet per minute.
C) 6,000 feet per minute.

237.
What is the expected duration of an individual microburst?
A) Two minutes with maximum winds lasting approximately 1 minute.
B) One microburst may continue for as long as 2 to 4 hours.
C) Seldom longer than 15 minutes from the time the burst strikes the ground until dissipation.

238.
What is an operational consideration if you fly into rain which freezes on impact?
A) You have flown into an area of thunderstorms.
B) Temperatures are above freezing at some higher altitude.
C) You have flown through a cold front.

239.
Which conditions result in the formation of frost?
A) The temperature of the collecting surface is at or below freezing and small droplets of moisture are falling.
B) When dew forms and the temperature is below freezing.
C) Temperature of the collecting surface is below the dewpoint of surrounding air and the dewpoint is colder than freezing.

240.
The presence of ice pellets at the surface is evidence that
A) there are thunderstorms in the area.
B) a cold front has passed.
C) there is freezing rain at a higher altitude.

2007 Instrument Knowldge Tests (２００７年版の計器飛行問題です。　問題数が多いので、勉強にはお勧め！）
001 〜 010	011 〜 020	021 〜 030	031 〜 040	041 〜 050	051 〜 060	061 〜 070	071 〜 080	081 〜 090	091 〜 100
101 〜 110	111 〜 120	121 〜 130	131 〜 140	141 〜 150	151 〜 160	161 〜 170	171 〜 180	181 〜 190	191 〜 200
201 〜 210	211 〜 220	221 〜 230	231 〜 240	241 〜 250	251 〜 260	261 〜 270	271 〜 280	281 〜 290	291 〜 300
301 〜 310	311 〜 320	321 〜 330	331 〜 340	341 〜 350	351 〜 360	361 〜 370	371 〜 380	381 〜 390	391 〜 400
401 〜 410	411 〜 420	421 〜 430	431 〜 440	441 〜 450	451 〜 460	461 〜 470	471 〜 480	481 〜 490	491 〜 500
501 〜 510	各問題の Knowledege　Code と その参考書籍（出題元、Subject Matter / Reference Material）　現在では違うタイプが使われてます。

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