Demo: SPL

The correct answer is: a vertical or horizontal change of wind speed and wind direction. Wind shear means sudden changes in wind speed or direction. The other options describe specific phenomena, slow changes, or require a certain speed change, which is not accurate.

Thunderstorms are often linked to strong wind shear, both horizontal and vertical, due to intense updrafts, downdrafts, and sudden changes in wind direction and speed. The other weather phenomena usually do not cause significant wind shear.

Wind shear often occurs in the presence of an inversion, as wind speed and direction can change rapidly with height. Passing a warm front, calm wind in cold weather, or summer days with calm winds are less likely to cause wind shear.

With decreasing headwind, IAS drops and lift decreases, causing the approach path to become lower and IAS to decrease. The other answers are incorrect because they suggest either an increase in IAS or a higher path, which does not happen in this scenario.

With increasing headwind, lift increases, so the aircraft climbs above the approach path and IAS increases. The other answers are wrong because they suggest a lower path or decreasing IAS, which does not happen with increasing headwind.

With decreasing tailwind, the headwind component increases. This causes IAS to increase and the aircraft to rise above the approach path. So: Path is higher, IAS increases. The other answers are incorrect because they suggest a lower path or decreasing IAS, which is not correct in this scenario.

The correct answer is to avoid take-off and landing during heavy showers or thunderstorms, as wind shear is often associated with these conditions. The other options mention weather phenomena but are not specifically relevant to wind shear.

The correct decision is to turn back, as visual meteorological conditions are sufficient along the previous track. The other options suggest continuing in poor visibility, which is not allowed under VFR regulations.

Correct: Wake turbulence on or near the runway. With only slight crosswind, wake turbulence drifts slowly and can remain close to the runway, posing a hazard. The other options describe effects that occur with stronger winds or are incorrect for light crosswind.

A harvested cornfield is usually flat, obstacle-free, and has firm ground. A plowed field is uneven, sports areas in villages have obstacles and people, and a glade with long grass can block the landing gear.

Correct: conducted in an attempt to sustain flight safety. A precautionary landing is made to avoid potential danger. The other options refer to forced landings, engine failure, or technical details not specific to precautionary landings.

A light brown field with short crops is best because it is usually flat, obstacle-free, and firm. A meadow may hide holes, ripe crops are too tall, and a lake is unsuitable for land planes.

The correct answer is that accident risk increases when the decision to land off-field is made too late. This leaves little time for safe site selection and preparation. The other options do not typically cause accidents during off-field landings.

Coordination of plane movements with other aircraft in the same updraft is correct, as it ensures all pilots are aware of each other's actions. Alternate circling, imitation, or abrupt maneuvers increase collision risk and are unsafe.

Touching down with minimum speed and keeping the elevator pulled until full stop is correct, as it reduces stress on the landing gear on rough ground. The other options increase the risk of damage or loss of control.

Carefully extending spoiler flaps and steering back to normal is correct, as it gently reduces height without endangering the tow. Pulling, pushing hard, or sideslipping can destabilize both planes and are unsafe during tow.

Correct: Push nose down, decouple, then decide for short pattern or straight ahead landing based on height, terrain, and wind. This ensures safe speed first. Others are wrong: they either mix up the order, suggest risky turns, or recommend dangerous minimum speed.

Decoupling the cable immediately is correct, as wing ground contact during winch launch is very dangerous. Releasing prevents a possible rollover. The other actions do not reliably solve the problem and may increase accident risk.

Decoupling the cable immediately is correct, as exceeding max speed is dangerous. Pulling the elevator or extending spoilers can destabilize the glider. Radioing the controller does not solve the urgent problem.

Decoupling the cable immediately is correct, as losing sight of the tow plane means the glider pilot can no longer ensure safety. The other actions delay response or are unsafe, as they do not directly solve the problem.

The correct action is to decouple immediately and inform the airfield controller via radio. The second cable poses a hazard. Continuing the launch, just watching, or informing after landing is unsafe and can cause accidents.

Correct: Approach with increased speed uphill, land, and flare quickly. This prevents overshooting and maintains control. Minimum speed is risky, parallel to the ridge is often not possible, and downhill is dangerous due to excessive speed.

The emergency canopy release handle is red because red is internationally used as a warning and emergency color. Green, blue, and yellow are not used for emergency controls and could cause confusion in critical situations.

The correct action is to continue the launch to normal altitude, using the horizon and airstream noise to fly a pattern and land. The other options are incorrect because they are unsafe or do not ensure a safe landing.

Retract the landing gear and perform a belly landing at minimum speed, as unlocked gear may collapse. The other options are incorrect because they risk loss of control or greater damage.