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Blade NIFE Weather Exam With 100%
Correct Answers
T/F- The rate of pressure change in a direction perpendicular to the isobars (horizontal distance) is called the pressure gradient. - correct answers ✔✔True What are the two units used to measure and report atmospheric pressure? - correct answers ✔✔inches of mercury (in-Hg) and millibars (mb) At the top of the troposphere, there is a transition layer called the: - correct answers ✔✔Tropopause A pilot flying at 10,000 feet and at a temperature of -8oC wishes to find an altitude at which the temperature is +4oC. The pilot should: - correct answers ✔✔Descend to approximately 4, feet T/F- Station pressure is the pressure that would be measured from the existing weather if the station were at mean sea level (MSL). Sea level pressure is the atmospheric pressure measured directly at an airfield or other weather station. - correct answers ✔✔False T/F- Atmospheric (barometric) pressure is the pressure exerted on a surface by the atmosphere due to the weight of the column of air directly above that surface. - correct answers ✔✔True What is an air mass? - correct answers ✔✔a large body of air that has essentially uniform temperature and moisture conditions in a horizontal plane.
What is the standard atmosphere in accordance with Naval aviation fundamentals? - correct answers ✔✔standard day conditions at sea level, which are 29.92 in-Hg (1013.2 mb) and 15° C (59° F)., What is the temperature lapse rate? - correct answers ✔✔The decrease in atmospheric temperature with increasing altitude What is a temperature inversion? - correct answers ✔✔a lapse rate where the temperature increases with increasing altitude, such as occurs in the stratosphere, What is indicated altitude? - correct answers ✔✔Altitude read directly from the altimeter. What is dew point temperature? - correct answers ✔✔(TD) is the temperature at which saturation occurs, What is relative humidity? - correct answers ✔✔Percent of saturation of the air Which of the following surfaces would produce the strongest thermal turbulence on a clear sunny day? A. large lake b. Grassy fields c. Forests d. A plowed field - correct answers ✔✔A plowed field T/F- Frontal turbulence is caused by lifting of cold air by a frontal surface leading to instability, or by the abrupt wind shift between the warm and cold air masses. - correct answers ✔✔False
What type of turbulence is generated by wind flowing over or around irregular terrain? - correct answers ✔✔Mechanical What is considered an extremely hazardous type of icing? - correct answers ✔✔Clear Which is NOT a recommended procedure if you can't avoid flying in turbulence? a. To avoid overstressing the aircraft, don't make abrupt control inputs. Use moderate control inputs to reestablish the desired attitude. b. Trim the aircraft for level flight at the recommended turbulent air penetration airspeed. Don't change trim after the proper attitude has been established. c. Establish and maintain thrust settings consistent with turbulent air penetration airspeed and aircraft attitude. Severe turbulence may cause large and rapid variations in indicated airspeed. Don't chase airspeed. d. Keep an eye on the altimeter and do not allow altitude to vary. - correct answers ✔✔d. Keep an eye on the altimeter and do not allow altitude to vary. What can form when warm, moist air moves over a cold surface and is then cooled to the dew point? - correct answers ✔✔Advection fog Jet stream turbulence can sometimes reach speeds of over 250 knots. - correct answers ✔✔True Severe turbulence can be encountered _____ to _____ miles downwind of a thunderstorm. - correct answers ✔✔15, 30 The most severe icing will generally be encountered in what temperature range? - correct answers ✔✔0 and -10 degrees C
A condition wherein the air temperature aloft is higher than that of the lower atmosphere is generally referred to as: - correct answers ✔✔A temperature inversion The four methods of lifting are: - correct answers ✔✔convergence, frontal, orographic, and thermal. Frontal turbulence would be the most severe when associated with a: - correct answers ✔✔Fast moving cold front A squall line is a: - correct answers ✔✔a line of violent thunderstorms. An unstable condition will exist when lifted air is: - correct answers ✔✔Warmer than surrounding air A cold front occlusion will generally move in a: - correct answers ✔✔Northeasterly direction, at the speed of a surface front In what direction to local winds tend to blow during the day and night in areas where large bodies of water meet land? - correct answers ✔✔From water to land during the day and from land to water at night If the wind at 3000 ft is from the North and is the result of a high pressure system, what direction would the surface wind be from? - correct answers ✔✔Northwest If you are flying from East to West and encounter cirrus, cirrostratus, altostratus, and then nimbostratus clouds, you are most likely approaching a: - correct answers ✔✔Stationary front or Warm front
The horizontal distribution of pressure on the Earth's surface is depicted on weather charts by. - correct answers ✔✔isobars The weight of the air mass over any point on the Earth's surface defines: - correct answers ✔✔atmospheric pressure The quantities 1013.2 mb and 29.92 in-Hg are two different expressions for the. - correct answers ✔✔standard atmospheric pressure at mean sea level and at a standard air temperature of 15° C A decrease of one inch of mercury in atmospheric pressure would cause a change in an altimeter reading of approximately_________ feet (assuming constant elevation and altimeter setting). - correct answers ✔✔plus 1000 Which slur is used as a Kollsman window setting for an altimeter in the U.S. (assuming an airfield above sea level)? - correct answers ✔✔Sea level pressure The height of an aircraft above the ground is known as - correct answers ✔✔AGL/absolute altitude Which one of the following types of altitudes would be assigned in the U.S. above 18,000 feet MSL? - correct answers ✔✔Pressure altitude (PA) Density altitude is - correct answers ✔✔an indicator of aircraft performance. The altimeter setting at Randolph AFB is 29.85 in-Hg, and at Vance AFB, the altimeter setting is 30.15 in-Hg. A pilot sets the altimeter correctly at Randolph and flies to Vance at an indicated altitude of 5000 feet without changing the altimeter setting.
Assuming a standard lapse rate, what is the MSL/true altitude when flying over Vance at the assigned indicated altitude? - correct answers ✔✔5300 feet The altimeter setting at Randolph AFB is 29.85 in-Hg, and at Vance AFB, the altimeter setting is 30.15 in-Hg. A pilot sets the altimeter correctly at Randolph and flies to Vance at an indicated altitude of 5000 feet without changing the altimeter setting. If Vance's elevation is 1307' MSL, what is the AGL/absolute altitude over Vance? - correct answers ✔✔3993 feet The altimeter setting at Randolph AFB is 29.85 in-Hg, and at Vance AFB, the altimeter setting is 30.15 in-Hg. A pilot sets the altimeter correctly at Randolph and flies to Vance at an indicated altitude of 5000 feet without changing the altimeter setting. If the pilot lands successfully at Vance (elevation 1307' MSL) without resetting the altimeter, what altitude will the altimeter indicate? - correct answers ✔✔1007 feet What is the primary reason atmospheric circulation takes place? - correct answers ✔✔Ascending and descending current due to heating and cooling Cold air masses are considered _______ because the air _______ than the surface. - correct answers ✔✔unstable, colder Stratiform clouds are associated with______ flight conditions - correct answers ✔✔stable At which altitude could an altostratus cloud be found? a. 5000' MSL b. 5000'AGL
