RPC Aviation Weather Services 2

Question 1

A METAR observation includes the remark 'TS ALQDS.' What does this indicate?

Accepted Answer

Thunderstorms in all quadrants around the station

Answer

Towering cumulus clouds in all quadrant directions

Answer

Temperature sensors are active in all quadrants

Answer

Turbulence at all altitudes around the quadrant

Question 2

Which aviation weather product provides forecasts for specific airport terminal areas and is valid for 24 to 30 hours?

Accepted Answer

TAF

Answer

METAR

Answer

SIGMET

Answer

AIRMET

Question 3

When decoding a winds aloft forecast, the entry '9900' for wind direction and speed means:

Accepted Answer

Winds are calm or less than 5 knots

Answer

Wind speed exceeds 99 knots

Answer

Wind direction is 990 degrees magnetic

Answer

Data is unavailable for that altitude

Question 4

A SIGMET (WS) is issued for which of the following conditions?

Accepted Answer

Severe or extreme turbulence at any altitude

Answer

Moderate icing below 18,000 feet MSL

Answer

Moderate turbulence below 18,000 feet MSL

Answer

Marginal VFR conditions at airport terminals

Question 5

On a surface analysis chart, isobars spaced closely together indicate:

Accepted Answer

Strong pressure gradient and stronger winds

Answer

Light and variable winds

Answer

High relative humidity in the area

Answer

Stable air with little vertical mixing

Question 6

What does the 'SM' unit represent in a METAR visibility report?

Accepted Answer

Statute miles

Answer

Sea miles

Answer

Standard meters

Answer

Sight miles

Question 7

A remote pilot notices the surface temperature is 85°F and the dewpoint is 83°F. This small temperature-dewpoint spread suggests:

Accepted Answer

High relative humidity and increased likelihood of fog or low clouds

Answer

Very low relative humidity and excellent visibility

Answer

Rapidly decreasing pressure gradient

Answer

Unstable air with severe turbulence potential