5838703
Description
Quiz by tsampikos pompou, updated more than 1 year ago
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Created by tsampikos pompou
over 8 years ago
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Question 1
Question
287 In the Northern Hemisphere, the Coriolis Effect deflects air to the:
Answer
-
O right.
-
O left.
-
O does not deflect the air at all.
-
O north
Question 2
Question
288 Which weather phenomenon signals the start of the mature stage of a thunderstorm cell?
Answer
-
O The start of precipitation.
-
O The appearance of an anvil top.
-
O The growth-rate of the cell is maximum.
-
O The appearance of updraft
Question 3
Question
289 Thunderstorm cells should be avoided by at least:
Answer
-
O 10 nm.
-
O 40 nm.
-
O 30 nm.
-
O 25 nm
Question 4
Question
290 The Adiabatic Lapse Rate for a dry parcel of air is:
Answer
-
O 3°C/1000 ft.
-
O 1.98°C/1000ft.
-
O 1.5°C/1000ft.
-
O 2.5°C/1000ft
Question 5
Question
291 With respect to High and Low pressure systems, which of the following state¬
ments is true?
Answer
-
O A High pressure area, or Ridge, is an area of descending air.
-
O A High pressure area, or Ridge, is an area of ascending air.
-
O A Low pressure area, or Trough, is an area of descending air.
-
O A Low pressure area, or Ridge, is an area of descending air
Question 6
Question
292 In the Northern Hemisphere, an aircraft flying from High to Low pressure will experience:
Answer
-
O starboard drift.
-
O no drift.
-
O port drift.
-
O drift to the south
Question 7
Question
293 Select the true statement concerning isobar and windflow patterns around High and Low pressure systems, as shown on Synoptic Charts:
Answer
-
O When the isobars are close together, the pressure gradient force is stronger and wind velocities are higher.
-
O Surface winds flow perpendicular to the isobars.
-
O When the isobars are far apart, crests of standing waves may be marked by lenticular clouds.
-
O When the isobars are close together, the pressure gradient force is weaker and wind velocities are lower.
Question 8
Question
294 The primary distinction between the Troposphere and the Stratosphere is a difference in:
Answer
-
O temperature lapse rates.
-
O moisture content.
-
O pressure.
-
O oxygen content
Question 9
Question
295 The precipitation associated with the passage of a cold front usually extends horizontally by approximately:
Answer
-
O 30 to 50 nautical miles.
-
O 100 to 200 nautical miles.
-
O 200 to 500 nautical miles.
-
O 150 to 250 nautical miles
Question 10
Question
296 As a parcel of air rises, it cools. In doing so, its ability to retain water vapour:
Answer
-
O decreases.
-
O increases.
-
O remains unchanged.
-
O it depends on the pressure
Question 11
Question
297 Employing Buys Ballot's Law, if you stand facing the wind in the Northern Hemisphere, the low pressure is:
Answer
-
O on your right.
-
O on your left.
-
O in front of you.
-
O behind you
Question 12
Question
298 Ice crystals may be converted directly to water vapour. What is this process called?
Answer
-
O Sublimation.
-
O Supercooling.
-
O Supersaturation.
-
O Evaporation
Question 13
Question
299 The percentage gases, other than nitrogen, oxygen and water vapour, in the atmosphere is:
Answer
-
O 1%.
-
O 5%.
-
O 3%.
-
O 2%
Question 14
Question
300 The heat energy required to change state from liquid water to water vapour without an increase in temperature is:
Answer
-
O latent heat.
-
O transient heat.
-
O retained heat.
-
O evaporation heat
Question 15
Question
301 Which is a characteristic of stable air?
Answer
-
O Restricted visibility.
-
O Cumuliform clouds.
-
O Excellent visibility.
-
O Turbulence
Question 16
Question
302 Which of the following processes can produce fog?
Answer
-
O Advection.
-
O Divergence.
-
O Convection.
-
O Convergence
Question 17
Question
303 The observed temperature at the surface is +11°C and at 4000 feet the temper¬ature is +16°C. The state of the atmosphere can be described as:
Answer
-
O Stable.
-
O Unstable.
-
O Conditionally stable.
-
O It depends on the humidity
Question 18
Question
304 When a wind changes direction from Southerly to South-Westerly, it is said to have:
Answer
-
O veered in either hemisphere.
-
O veered in the Northern hemisphere and backed in the Southern hemi¬sphere.
-
O backed in the Northern hemisphere and veered in the Southern hemi¬sphere.
-
O backed in either hemisphere
Question 19
Question
305 A typical warm front extends horizontally for approximately:
Answer
-
O 600 miles.
-
O 200 miles
-
O 100 miles.
-
O 50 miles
Question 20
Question
306 Following the passage of a typical cold front, an observer at the surface would expect to experience which of the following conditions?
Answer
-
O (Pressure)> steady rise. (Clouds)>SCT/BKN Cu. (Visibility)> generally good
-
O (Pressure)> fall then rise. (Clouds)>BKNCu/Scu. (Visibility)> poor with fog
-
O (Pressure)>falling rapidly. (Clouds)>OVC NS/St. (Visibility)>very poor
-
O (Pressure)> rising rapidly. (Clouds)>OVC Ci/Cc. (Visibility)>Poor
Question 21
Question
307 Mist and fog occur when small water droplets are suspended in the air, hence reducing visibility. What is the difference between mist and fog?
Answer
-
O Fog is defined as having a visibility less than 1 kilometre
-
O Fog has a slightly lower Relative Humidity than mist.
-
O Mist is defined as having a visibility less than 1 kilometre.
-
O Fog is defined as having a visibility less than 1.5 kilometre
Question 22
Question
308 Over land in mid latitudes, which statement concerning the diurnal variation oftemperature is most appropriate?
Answer
-
O Maximum temperature occurs at around 1400-1500 LMT, with the minimum temperature occurring just before dawn.
-
O Maximum temperature occurs at around 1400-1500 UTC, with the minimum temperature occurring just before dawn.
-
O Maximum temperature occurs around midday, with the minimum temperature occurring just after sunset.
-
O It depends on the longitude
Question 23
Question
309 (Fig.52) Gust-fronts are usually associated with:
Answer
-
O thunderstorms.
-
O high pressure areas.
-
O castellanus.
-
O lenticularis
Question 24
Question
310 In the International Standard Atmosphere (ISA) the temperature is assumed to decrease at the rate of:
Answer
-
O 1.98°C per 1000 feet.
-
O 2°K per 1000 feet.
-
O 1.98°C per 1000 metres.
-
O 3°C per 1000 feet
Question 25
Question
311 The decode for hail in a METAR is
Answer
-
O GR
-
O PE
-
O SN
-
O HZ
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