4.0 Aeronautics - General Knowledge

81.  A METAR describes the weather

  1. expected at a station at a given time.
  2. expected at a station over a twelve hour period.
  3. observed at a station at the time of the report.
  4. observed at a station during the previous day.

82.  The use of low octane fuel in a high compression engine may result in

  1. too lean a mixture for best operation.
  2. carburettor icing.
  3. fouling of the spark plugs.
  4. detonation.

83.  If ice has accumulated on an aerofoil in flight, the stalling speed will

  1. remain unchanged.
  2. decrease in all flight conditions.
  3. increase in level flight only.
  4. increase in all flight conditions.

84.  If one magneto should fail on an engine equipped with dual ignition

  1. a slight loss of power would result.
  2. there would be no effect on the engine.
  3. the engine would stop.
  4. half of the cylinders would not fire.

85.  The use of carburettor heat will

  1. increase manifold pressure and enrich the mixture.
  2. increase manifold pressure and lean out the mixture.
  3. decrease manifold pressure and enrich the mixture.
  4. decrease manifold pressure and lean out the mixture.

86.  Under which conditions would the most serious carburettor icing be expected?

Outside air temperature range of ..... and ..... humidity.

  1. -5°C to 15°C, high.
  2. 5°C to 27°C, low.
  3. -21°C to 0°C, low.
  4. -21°C to 0°C, high.

87.  It is possible for carburettor icing to occur

  1. in clear air with high relative humidity at above freezing temperatures.
  2. only when precipitation is present at freezing temperatures.
  3. only in cloud with high relative humidity.
  4. only when water droplets are in suspension in the air.

88.  The initial application of carburettor heat will

  1. increase power and enrich the mixture.
  2. decrease power and lean out the mixture.
  3. decrease power and enrich the mixture.
  4. increase power and lean out the mixture

89.  An immediate rise in engine RPM is observed when full carburettor heat is applied. The most likely cause is

  1. the misture is too lean.
  2. on magneto is inoperative.
  3. the mixture is too rich.
  4. fuel contamination.

90.  Float type carburettors are more prone to icing than fuel injection systems because in the

  1. float type, fuel vaporization takes place near the carburettor throat.
  2. injection system, the fuel pressure at the discharge nozzle is greater therby suppressing the formation of ice.
  3. float type, the location of the throttle valve is upstream from the venturi, providing a 'catch' for the ice to form.
  4. injection system, the fuel is preheated to suppress ice formation around the discharge nozzle.

91.  Ground effect will enable a helicopter to hover with less power primarily due to

  1. a decreased lift/drag ratio.
  2. an increase in downwash.
  3. a decrease in induced drag.
  4. an increase in blade tip vortices.

92.  The correct height above sea level is indicated on a pressure altimeter set to 29.92 in. Hg. only when

  1. the conditions of a Standard Atmosphere exist.
  2. a standard lapse rate exists.
  3. set to the local barometric pressure setting.
  4. the barometric pressure is 29.92 in. Hg.

93.  The altimeter setting is 29.70 in. Hg. If the pilot inadvertently sets 30.70 in. Hg on the altimeter subscale, the altimeter will read

  1. 1,000 feet high.
  2. 1,000 feet low.
  3. 100 feet high.
  4. 100 feet low.

94.  A major early symptom of hypoxia (lack of sufficient oxygen) is

  1. drowziness.
  2. dizziness.
  3. euphoria (increased sense of well being).
  4. hyperventilation (overbreathing).

95.  The tendency of the human eye to focus at a point three to five feet away, due to lack of stimulation, is called

  1. retinitis.
  2. tunnel vision.
  3. empty-field myopia.
  4. far-sighted myopia.

96.  The effects of one drink of alcohol at sea level will

  1. increase with an increase in altitude.
  2. decrease with an increase in altitude.
  3. remain the same with an increase in altitude.
  4. remain constant to 6,000 feet ASL.

97.  During an approach to land on an upsloping runway the pilot may experience the illusion that the aircraft is

  1. higher than it actually is.
  2. lower than it actually is.
  3. closer in than it actually is.
  4. approaching faster than it actually is.

98.  When turning from downwind to into-wind at low altitude, a pilot may experience an illusion of

  1. slipping and decreasing airspeed.
  2. skidding and decreasing airspeed.
  3. slipping and increasing airspeed.
  4. skidding and increasing airspeed.

99.  Refer to Appendix:  TURN CO-ORDINATOR (DIAGRAM #1)

The turn co-ordinator indicates that the aircraft is in a

  1. slipping left turn.
  2. skidding left turn.
  3. slipping right turn.
  4. skidding right turn.

100.  Deceleration errors in the magnetic compass would be most pronounced on headings of

  1. North and South.
  2. East and North.
  3. East and West.
  4. West and South.