CTO Weather Observation & Reporting 5

Question 1

A controller notices the barometric pressure has dropped below 28.00 inches Hg. What action is required?

Accepted Answer

Issue a low altimeter setting alert to all aircraft

Answer

Controllers must alert pilots when the altimeter setting drops below 29.00 inches Hg, and especially note extremely low settings such as below 28.00 in Hg.

Question 2

What does a microburst wind shear alert from LLWAS typically include when transmitted to pilots?

Accepted Answer

Location, wind gain or loss, and recommended action

Answer

A microburst alert includes the location relative to the runway, wind gain or loss value in knots, and controller-issued advisory.

Question 3

Which type of fog forms when moist air moves over a surface that is colder than the air's dew point?

Accepted Answer

Advection fog

Answer

Advection fog forms when warm, moist air moves horizontally over a cooler surface, causing condensation near the ground.

Question 4

An aircraft reports moderate icing in cloud. Which ASOS sensor measures this condition?

Accepted Answer

ASOS does not measure icing; PIREPs are the primary source

Answer

ASOS cannot detect airframe icing; pilot reports (PIREPs) are the primary means of identifying icing conditions in flight.

Question 5

How is blowing snow (BLSN) differentiated from drifting snow (DRSN) in a METAR?

Accepted Answer

Blowing snow reduces visibility and rises above 6 feet; drifting snow stays below 6 feet

Answer

BLSN is reported when wind-driven snow reduces visibility and rises to 6 feet or more AGL, while DRSN stays below 6 feet.

(CTO) Air Traffic Control Tower Operator Certification Practice Test

(CTO) Air Traffic Control Tower Operator Certification Practice Test

CTO Weather Observation & Reporting 5