Aviation Weather Block test 1

Low-level wind shear is a change in windspeed of knots or more within feet AGL

10; 2,000

Which effect occurs to airplanes on departure during a high density altitude condition?

A longer landing roll is required.

Air flow around a high diverges in a ____________ motion and sinks

Clockwise

Air flow around a low _____________ in a counterclockwise motion and ______________, causing the air to cool and eventually condense into clouds and precipitation.

Converges ; rises

When the __________ decreases to zero, the air becomes ________________________, and condensation will form dew, fog, or clouds

Dew point; saturated

Which of the following is NOT true regarding fog

Fog forms slowly, allowing pilots to avoid this hazard

Which airplane would be most at risk from a 25-knot crosswind on landing?

General aviation, single propeller

Which of the following is a characteristic of a temperature inversion

Increased temperatures with increased altitude

What type of turbulence is caused by any obstruction to the wind, such as buildings or mountains?

Mechanical

Which two jet streams are commonly identified

Polar and subtropical

What is standard atmosphere used for? Check all that apply!

Pressure altimeter calibrations, Aircraft design, Aircraft performance calculations

What type of turbulence causes occupants to be forced violently against seat belts or shoulder straps, unsecured objects to be tossed about, and makes food service and walking impossible?

Severe

Which cloud formation often produces widespread IFR weather?

Stratiform

Which stage of a thunderstorm is characterized by updrafts exceeding 3,000 feet per minute?

Towering cumulus

Which layer of the atmosphere contains almost all clouds and precipitation

Troposphere

Standard Atmosphere is a hypothetical vertical distribution of the atmospheric temperature, pressure, and density, which, by international agreement, is considered to be representative of the atmosphere.

True

A parcel of air has the capacity to hold more water vapor is

Unsaturated

Water vapor, lift, and unstable air are necessary for the formation of

a thunderstorm cell

Light turboprop aircraft are more susceptible to icing than commercial jet aircraft because they typically fly

at lower altitudes

An area as large as 10 miles or more of strong damaging winds reaching speeds as high as 120 knots, on or near the ground, is a

downburst

A sudden wind shift, even at low speeds, can be hazardous on takeoff and landing because it can

quickly become a crosswind or tailwind

When de-icing or anti-icing equipment fails to reduce or control the icing hazard, the icing is categorized as

severe

Airplane performance gradually degrades as the wind

turns perpendicular to the runway

Severe damage can occur if *blank* is ingested into an engine

volcanic ash