Meteorological Knowledge Quiz

For an aircraft what are the meteorological dangers associated with a Harmattan wind?

• Dust and poor visibility.

• Hail.

• Thunderstorms.

• Sand up to FL150.

Visibility is reduced by haze when:

• a light drizzle falls.

• a cold front just passed.

• small water droplets are present.

• dust particles are trapped below an inversion.

When will the surface wind in a METAR record a gust factor?

• When gusts are at least 15 knots above the mean wind speed

• With gusts of at least 25 knots

• When gusts are at least 10 knots above the mean wind speed

• With gusts of at least 35 knots

Flight visibility from the cockpit during approach in a tropical downpour can decrease to as low as:

• about 200 m.

• about 500 m.

• about 1000 m

• tens of metres.

What does the METAR code "R24R/P1500" mean?

• Snow clearance in progress on RWY 24-Right, usable runway length 1500 metres.

• RVR RWY 24-Right is below 1500 metres.

• RVR RWY 24-Right is above 1500 metres.

• RVR RWY 24-Right is 1500 metres.

What does RVR stand for?

• Reduced visibility range.

• Runway visual range.

• Radio VHF range.

What is a radiosonde?

• Equipment used for determining upper winds (velocity and direction) by transmitting different radio waves and measuring the amount of the reflected waves by the moving air. These values correlate to the speed and direction of the wind.

• Instrument intended to be carried by a balloon up through the atmosphere, equipped with devices to measure meteorological variables and provided with a radio transmitter for sending this information to the observing station.

• A meteorological station on ground or water at which measurements of meteorological variables are made automatically and a radio transmitter sends automatically this information to a meteorological centre. These data from such a station are indicated in a METAR by the term auto.

• Equipment used for determining upper winds only (velocity and direction) by tracking a free balloon by electronic means at the observing station.

The radiosonde can directly measure:

• air temperature, humidity, wind.

• humidity, wind, atmospheric pressure.

• atmospheric pressure, air temperature, humidity.

• atmospheric pressure, air temperature, wind.

What are the images of satellites provided daily by the Weather Service used for?

• To measure wind currents on the ground

• To locate fronts in areas with few observation stations

• To locate precipitation zones

• To help provide 14-day forecasts

An airborne weather radar installation makes it possible to detect the location of

• zones of precipitation, particularly liquid-state precipitation, and also their intensity

• stratocumulus and its vertical development

• cumulonimbus, but provided that cloud of this type is accompanied by falls of hail

• all clouds