3.0 Meteorology

53.  Relative humidity is the

  1. amount of moisture present in the air.
  2. weight of water present in the air.
  3. amount of moisture present in the air compared to the amount the air could hold at that temperature and pressure.
  4. temperature to which the air must be lowered to bring about saturation.

54.  The cloud type usually associated with steady rain is

  1. altostratus.
  2. altocumulus.
  3. stratocumulus.
  4. nimbostratus.

55.  Clouds form when moist warm air overruns cold air because the warm air

  1. is cooled by the cold air underneath.
  2. is cooled by the surrounding cold air aloft.
  3. becomes unstable as a result of cooling from below.
  4. cools as a result of expansion as it rises.

56.  Advection fog forms when

  1. moist air moves from a warm surface to a colder surface.
  2. the cold ground cools the air in contact with it at night.
  3. moist air is influenced by Orographic effect.
  4. moist cool air moves from a cold surface to a warm surface.

57.  In the northern hemisphere, the winds blow

  1. clockwise around a high and a low.
  2. counter-clockwise around a high and a low.
  3. clockwise around a high and counter-clockwise around a low.
  4. counter-clockwise around a high and clockwise around a low.

58.  During a descent from 2,000 feet AGL to the surface, you will usually find that the wind

  1. veers and increases.
  2. backs and increases.
  3. veers and decreases.
  4. backs and decreases.

59.  An aircraft flying an approach into a strong head wind encounters a sudden tailwind near the ground. The wind shear hazard to be expected is a sudden

  1. increase in groundspeed and increase in lift.
  2. decrease in groundspeed and loss of lift.
  3. increase in airspeed and increase in lift.
  4. decrease in airspeed and loss of lift.

60.  The conditions required for the formation of thunderstorms are

  1. moist air, high temperature, and an inversion.
  2. Stratus cloud, high humidity and a lifting force.
  3. unstable air, high humidity and a lifting force.
  4. a mixing of two different air masses.

61.  A condition when the air temperature aloft is higher than that of the lower atmosphere is generally referred to as

  1. a low pressure area.
  2. an inversion.
  3. a reverse temperature condition.
  4. an inverse convection condition.

62.  Air masses which are being cooled from below are characterised by

  1. strong winds, cumulus cloud, good visibility.
  2. uniform temperature, good visibility.
  3. continuous rain, freezing temperature.
  4. fog, poor visibility and layer cloud.

63.  A front is a

  1. narrow zone of fog between a cyclone and an anticyclone.
  2. line of thunderstorms.
  3. narrow transition zone between two air masses.
  4. mass of layer cloud which is very thick and which covers a wide area.

64.  During the passage of a cold front

  1. warm air is compressed as cold air rides over it.
  2. temperature rises owing to increased pressure.
  3. fog will always form from the interaction of warm and cold air.
  4. warm air is lifted as colder air pushes under it.

65.  Radiation fog forms as a result of the

  1. passage of cold air over a warm surface.
  2. air becoming moist as it moves over the sea.
  3. clouds becoming cold and heavy at night so that they settle to the ground.
  4. ground becoming cold at night and cooling the air in contact with it.

66.  The following sequence of clouds is observed at an airport: cirrus, altostratus, nimbostratus. The observer should expect

  1. the passage of a cold front.
  2. anticyclonic weather.
  3. the passage of a warm front.
  4. clearing skies and a decrease in temperature.

67.  Cloud heights in Canadian Aerodrome Forecasts (TAF) are given in

  1. feet AGL.
  2. feet ASL.
  3. metres AGL.
  4. metres ASL.
68. Pressure Altitude 4,500 feet
  Temperature 20°C

The density altitude will be nearest to

  1. 7,300 feet.
  2. 6,100 feet.
  3. 5,400 feet.
  4. 4,500 feet.
69. Aerodrome elevation 4,600 feet ASL
  Altimeter Setting 29.52 in. Hg.

The pressure altitude is

  1. 5,000 feet.
  2. 4,640 feet.
  3. 4,600 feet.
  4. 4,200 feet.

70.  Failure to adjust the altimeter when flying from an area of low pressure to an area of higher pressure will result in the aircraft indicated altitude reading

  1. higher than the actual altitude.
  2. lower than the actual altitude.
  3. the actual true altitude.
  4. the actual pressure altitude.

71.  Refer to Appendix:  WEATHER SYNOPSIS #100 (FD)

The average wind applicable to a direct flight from Winnipeg (CYWG) to Brandon (CYBR) at 5,500 feet would be

  1. 290°M at 30 kt.
  2. 290°T at 30 kt.
  3. 310°M at 31 kt.
  4. 310°T at 31 kt.

72.  The forecast surface wind will be included in a GFA if it has a sustained speed of at least

  1. 5 kt.
  2. 10 kt.
  3. 15 kt.
  4. 20 kt.

73.  Refer to Appendix:  WEATHER SYNOPSIS #100 (TAF)

The cloud condition at Churchhill (CYYQ) is forecast to

  1. remain clear.
  2. thicken and lower.
  3. remain scattered until 0900Z.
  4. become overcast at 200 feet.

74.  Refer to Appendix:  WEATHER SYNOPSIS #100 (TAF)

The forecast visibility at Churchhill (CYYQ) between 1500Z and 2100Z is

  1. 15 SM in wet snow.
  2. 15 NM in wet snow.
  3. greater than 6 NM.
  4. greater than 6 SM.

75.  Refer to Appendix:  WEATHER SYNOPSIS #100 (TAF)

The Gillam (CYGX) aerodrome forecast covers a period of

  1. 24 hours.
  2. 12 hours.
  3. 10 hours.
  4. 6 hour.

76.  Refer to Appendix:  WEATHER SYNOPSIS #100 (TAF)

The Gillam (CYGX) 1800Z wind is forecast to be

  1. 260°T at 10 kt.
  2. 260°M at 10 kt.
  3. variable at 3 kt.
  4. calm.

77.  Refer to Appendix:  WEATHER SYNOPSIS #100 (METAR/TAF)

The 1500Z Portage La Prairie (CYPG) METAR indicates that the

  1. visibility is greater than forecast.
  2. ceiling is lower than forecast.
  3. winds are lower than forecast.
  4. ceiling is as forecast.

78.  Refer to Appendix:  WEATHER SYNOPSIS #100 (METAR)

The ceiling at Brandon (CYBR) at 1500Z is

  1. 200 feet.
  2. 1,000 feet.
  3. 2,000 feet.
  4. 10,000 feet.

79.  Refer to Appendix:  WEATHER SYNOPSIS #100 (METAR)

The 1500Z temperature/dewpoint spread at Portage La Prairie (CYPG) is

  1. minus 20°C.
  2. minus 24°C.
  3. minus 15°C.
  4. 4° C.

80.  Refer to Appendix:  WEATHER SYNOPSIS #100 (METAR)

The altimeter setting at Winnipeg (CYWG) is

  1. 30.43 in. Hg.
  2. 30.43 mb.
  3. 933.2 in. Hg.
  4. 1332.0 mb.