2.2b - Aviation Weather Hazards

In daylight, thunderstorms that form along a warm front will be difficult to see likely due to them:

Being imbedded in the mass of other clouds present.

When approaching a winter warm front from the cold side you would expect to encounter precipitation in the following order:

Snow, ice pellets, freezing rain, rain.

When experiencing a suspected tail plane stall the correct recovery technique involves:

Pulling the control column towards you.

The necessary conditions for the formation of thunderstorms are:

High humidity, unstable air, lifting agent.

Hoar frost is caused when __________ and commonly forms __________.

Water vapour sublimates directly onto the cold skin of the aircraft; cold, clear evenings with little or no wind.

Fog that forms as a result of warm air moving horizontally over a cool surface is:

Advection fog.

Wind shear is common near the ground during conditions involving strong surface winds, surface inversions, and thunderstorms. Decreased performance shear will result in a ___________ in airspeed and a _____________ in lift.

Decrease; decrease.

Arctic Sea Smoke occurs when:

Very cold arctic air passes over openings in the pack ice leading to instantaneous sublimation of moisture absorbed into the atmosphere

The factors that affect the rate at which ice accumulates on an aircraft are:

Size and number of supercooled droplets, aircraft speed, surface profile.

Thunderstorms are dangerous to aircraft operations and should be avoided by at least:

20 nautical miles.

The most significant performance loss caused by airframe icing is caused by:

The loss of aerodynamic efficiency of the airfoils.

Rime ice forms in conditions with ________________ and is more brittle than clear ice which forms_______________ and presents a hard, glazed appearance.

Small water droplets; in conditions with large water droplets.

When flying in “Moderate” turbulence you would expect:

Occupants to feel definite strains on seat belts and shoulder straps.

Supercooled water droplets are:

Liquid water droplets that exist at temperatures below freezing.