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IFR (Instrument Rating) Airman Knowledge Test Questions 2007
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.
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.
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.
(Refer to figure 9.) What type of thunderstorm activity is expected over Montana on April 4th at 0800Z?
C) A slight risk of severe thunderstorms.
(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.
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.
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.
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.
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.
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.
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