186 Which of the following is correct:
O The diurnal range of temperature is least in tropical countries
O The diurnal variation of temperature is greatest when a moderate wind is blowing
O The diurnal range of temperature sees the lowest temperature at sunrise
O The diurnal range of temperature is greatest in conditions of high humidity
187 The measurement of surface temperature is made:
O Approximately 4 feet above ground level
O At ground level
O Approximately 10 metres above ground level
O Approximately 4 metres above ground level
188 It is possible for temperature to increase with height. This is known as:
O An Inversion
O An isothermal layer
O A temperature conversion
O A steep lapse rate
189 A saturated atmosphere has a surface temperature of +12C and a temperature of +2C at 4000ft. The atmosphere is:
O Unstable
O Stable
O Conditionally stable
O Conditionally neutral
190 Pressure altitude is:
O The height in the standard atmosphere at which the aircraft ambient pressure would be experienced
O The standard pressure prevailing at official airfield level
O The height indicated on a pressure altimeter when the sub-scale is set to QFE
O The height indicated on a pressure altimeter when the sub-scale is set to QNH
191 Latent heat is defined in meterology as:
O The quantity of heat emitted when condensation occurs which increases the temperature of the air
O The quantity of heat absorbed decreasing the lapse rate of saturated air
O lapse rate in dry air
O The quantity of heat emitted which increases the lapse rate of saturated air
192 Which of the following options is the most effective way of heating the troposphere:
O Outgoing long wave radiation from the Earth
O Incoming short wave radiation from the sun
O Incoming long wave radiation fromt he sun
O Outgoing short wave radiation from the Earth
193 As air is cooled to below its dew point temperature:
O The actual water vapour content decreases to remain equal to the saturated water vapour content
O The actual water vapour content increases to remain equal to the
O The saturated water vapour content remains constant as the air is at 100% relative humidity
O The saturated water vapour content increases as precipitation takes place when the temperature drops
194 Which of the following is correct:
O The Pressure Gradient Force acts from High pressure to Low pressure in both hemispheres
O The Geostrophic Wind flows along straight and parallel isobars at all latitudes,except Buys Ballot's Law is reversed in the southern hemisphere
O The Geostrophic Force acts at 90 degrees to the isobars in equatorial latitudes
O The Pressure Gradient Force acts in the same direction as the isobars in equatorial latitudes
195 When air is lifted due to the presence of a range of mountains in its path, the resulting vertical motion is referred to as:
O Orographic lifting
O Turbulence
O Convergence
O Frontal lifting
196 A Foehn wind is:
O A warm dry wind which blows down the leeside of a mountain
O A wind which flows down the leeside of a mountain due to its greater density
O A warm wind which flows down the leeside of a mountain due to the pressure distribution
O A dry wind which blows through a mountain gap or valley
197 Radiation fog often occurs:
O In anti-cyclonic conditions with air of maritime origin
O Near the coasts in the warm air of a polar depression in late spring
O In a polar low which is intensifying
O Along the line of a warm front of a warm sector depression
198 The intensity of precipitation associated with dense nimbostratus is:
O Moderate or heavy
O Light
O Heavy, possibly hail
O Nil
199 A SIGMET message concerns:
O Weather phenomena likely to affect the safety of aircraft
O Severe weather that is encountered by the pilot of an aircraft
O Weather conditions likely to affect the safety of aircraft
O A routine report of sig weather issued by a local Met Office
200 With relation to isobars on the sea level chart, surface wind:
O Is inclined towards the area of low pressure
O Is inclined towards the area of high pressure
O Blows along the isobars with high pressure to the right in the northern hemisphere
O Blows along the isobars with high pressure to the left in the northern hemisphere
201 Subsidence in an anticyclone produces:
O Dry air and an inversion
O Saturated air and an inversion
O Isothermal dry and stable air
O Increased pressure at the surface
202 Frontal fog:
O Occurs in a narrow band where the frontal surface meets the ground
O Occurs in precipitation at a cold front
O Is due to evaporation of rain drops in the cold sector
O Is due to rain saturating the warm sector air
203 The temperature lapse rate of rising saturated air in the lower troposphere is:
O 1.5 degrees C per 1000 feet
O 1.98 degrees C per 1000 feet
O 3 degrees C per 1000 feet
O 5.4 degrees C per 1000 feet
204 Aerodrome QNH is the:
O Aerodrome pressure converted to mean sea level assuming ISA conditions between the aerodrome and sea level
O Atmospheric pressure at the aerodrome level
O QFE converted to mean sea level assuming constant temperature conditions between the aerodrome and sea level
O Lowest value of QNH forecast to occur in the region of the aerodrome during a period of one hour
205 Sublimation occurs when:
O Water vapour in the air changes directly into ice
O Air is cooled below dewpoint temperature and fog forms
O Water droplets in suspension condense directly into ice
O Air is unable to support any more water vapour
206 If the relative humidity of a sample of air is 100%, then the actual amount of water vapour present would be:
O Greater at the Equator than at the poles
O Greater at the poles than at the Equator
O The same at the Equator as at the poles
O Greater at 10000ft than at mean sea level
207 Air Adiabatic temperature change occurs when :
O No heat energy is lost or gained when a parcel of air is subjected to a change of pressure
O The air temperature is altered as pressure decreases
O The pressure of a parcel of air is maintained constant and the temperature is altered
O Air cools at 3 degrees per 1000ft
208 A ridge of high pressure is generally associated with:
O Divergence and subsidence causing clear skies and good weather
O Divergence causing cloud to break up and more precipitation
O Convergence causing increased cloud and precipitation
O Divergence causing increased cloud and precipitation
209 Low cloud in temperate climates, excluding heap, are those existing from:
O The surface to 6500ft
O 1000ft to 6500ft
O The surface to 7500ft
O The surface to 7500 metres
210 Intensity of precipitation is described as:
O Slight, moderate or heavy
O Intermittent, continuous or showery
O Intermittent, moderate or heavy
O Drizzle, rain or snow
