Correct: D)
Explanation: In high mountain environments, weather can deteriorate with extreme speed due to orographic lifting and localized heating effects. This is the most significant hazard requiring special attention. Options A, B, and C describe technical inconveniences that may occasionally occur, but they are not the primary hazard. Rapid weather changes can trap a pilot in valleys with deteriorating visibility and violent turbulence, making option D the critical safety concern.
Correct: B)
Explanation: Oxygen under pressure can react violently with hydrocarbon-based greases and oils, potentially causing a flash fire or explosion. All components in contact with oxygen must be completely grease-free. Option D is directly dangerous because greasing the connector introduces a combustion risk. Options A and C describe good practices but are not the absolute safety-critical requirement. The oxygen-grease incompatibility is a fundamental rule in aviation oxygen system handling.
Correct: D)
Explanation: At only 400 m above ground, there is no time for any delay. The parachute must be deployed immediately after clearing the aircraft. Freefall covers roughly 50 m per second, so even 2-3 seconds of delay (option A) would consume 100-150 m of precious altitude. Option B (stabilizing in freefall) wastes critical seconds. Option C (before leaving) would entangle the parachute with the aircraft structure. At 400 m, every second counts for successful deployment and deceleration.
Correct: B)
Explanation: On short final, the commitment to land has been made. The safest action is to continue straight ahead with full airbrakes and use every available means (wheel brake, ground friction) to stop in the shortest distance possible. Option A (reducing to minimum speed) risks stalling close to the ground. Option C is similar to B but less specific about using all stopping means. Option D (turning to find another field) at this low altitude is extremely dangerous and likely to result in a stall-spin accident.
Correct: B)
Explanation: FLARM is a traffic awareness system that calculates collision risk based on predicted flight paths of nearby FLARM-equipped aircraft and issues warnings when a potential conflict is detected. Option A overstates its precision. Option C is incorrect because FLARM warns but does not recommend specific avoidance maneuvers. Option D is wrong because FLARM only detects other FLARM devices, not transponder-equipped aircraft (that would require a separate ADS-B receiver).
Correct: D)
Explanation: The indicated airspeed (IAS) for the approach should be the same as at sea level because the ASI measures dynamic pressure, which determines aerodynamic forces regardless of altitude. The stall IAS does not change with altitude. However, the true airspeed and groundspeed will be higher at altitude due to lower air density. Options A and C incorrectly adjust IAS, and option B applies a TAS correction to IAS, which is unnecessary.
Correct: D)
Explanation: When entering a downdraft, the descending air mass reduces the effective angle of attack on the wings, temporarily decreasing lift. The pilot feels a brief reduction in g-load (a sensation of lightness) as the aircraft begins to sink with the descending air. The glider's airspeed initially decreases momentarily. Option B describes what happens entering an updraft. Options A and C do not accurately describe the symmetrical effect of entering a downdraft center.
Correct: A)
Explanation: Cirrus clouds at high altitude filter incoming solar radiation, reducing the surface heating that drives thermal convection. Less heating means weaker thermals and potentially an earlier end to the soaring day. Option B is wrong because cirrus does not increase instability at thermal altitudes. Option C describes a shift that may occur but is not the primary effect. Option D underestimates the impact cirrus has on thermal generation through solar radiation reduction.
Correct: C)
Explanation: To maximize distance in a headwind, the pilot must fly faster than best-glide speed. The headwind reduces groundspeed, so the glider spends more time in the air and descends more before covering the desired ground distance. By increasing speed above best-glide, the pilot accepts a steeper glide angle but gains enough extra groundspeed to more than compensate. Option A (minimum sink) minimizes descent rate but covers minimal distance. Option B (best glide) is optimal only in still air. Option D (McCready zero) equals best-glide speed.
Correct: D)
Explanation: A freshly mown meadow provides a smooth, firm surface free of tall vegetation and hidden obstacles, ideal for a short ground roll in a glider. Option A (ploughed field) has soft soil and deep furrows that can nose the glider over. Option B (maize field) has tall crops that obscure hazards and create drag inconsistencies. Option C (country lane) is narrow, potentially lined with trees and power lines, and poses collision risks with vehicles.
Correct: B)
Explanation: Pilots may use the on-board radio on dedicated glider frequencies to communicate with their retrieve crew without needing a separate radiotelephony extension or rating. These frequencies are designated for glider operations and permit such operational communications. Option A unnecessarily restricts this practice. Option C invents a frequency limitation that does not exist. Option D incorrectly prohibits a communication that is routinely permitted.
Correct: D)
Explanation: At 1800 m AMSL, air density is lower than at sea level, so the true airspeed is higher than indicated airspeed for the same dynamic pressure reading. In nil-wind conditions, groundspeed equals TAS, which exceeds IAS. This means the aircraft approaches the runway at a higher groundspeed, requiring awareness of a longer ground roll. Options B and C underestimate the density altitude effect. Option A is partially true but the dominant factor is altitude.
Correct: B)
Explanation: Wearing a parachute is not compulsory for glider flights under current regulations, although it is strongly recommended and standard practice. The decision is left to the pilot. Option A invents an altitude-based requirement. Option C creates a restriction limited to aerobatics that does not exist. Option D overstates the requirement. While practically all glider pilots wear parachutes, it remains a personal safety choice.
Correct: D)
Explanation: After a cable break during the climb phase, the immediate priority is to release the remaining cable (which could snag) and then lower the nose to establish a safe glide. Option A (airbrakes first) wastes altitude when every meter counts. Option B reverses the priority because establishing glide before releasing could allow the cable to become entangled. Option C (radio call) wastes precious seconds during a time-critical emergency.
Correct: D)
Explanation: In a strong crosswind aerotow departure, the glider should be positioned upwind of the tow aircraft's centerline to prevent being blown across the tug's path during the ground roll. Option A states a normal sequence that does not address crosswind specifically. Option B provides a partial technique but does not address the pre-departure setup. Option C is incorrect because crosswinds typically increase takeoff distance.
Correct: D)
Explanation: When entering a thermal alone, the recommended technique is to first perform a figure-eight pattern to identify the strongest part of the thermal before committing to a circling direction. This allows the pilot to center the thermal efficiently. Options A and C prescribe a fixed direction without first locating the core. Option B is technically correct regarding regulations but does not describe the best practice. The figure-eight technique optimizes climb rate by finding the thermal center.
Correct: D)
Explanation: When flying near a slope, the pilot must maintain a sufficient safety distance that accounts for current conditions including wind, turbulence, and terrain features. This is a judgment-based requirement rather than a fixed numeric value. Option A only considers one factor. Options B (150 m) and C (60 m) specify fixed distances that may be appropriate in some contexts but do not reflect the general guidance emphasizing adequate safety margin.
Correct: B)
Explanation: When joining a thermal occupied by another glider, you must circle in the same direction to maintain a predictable traffic pattern and avoid head-on encounters. This is a fundamental rule of shared thermal etiquette. Option A incorrectly dismisses the need for directional coordination. Option C (opposite direction) creates dangerous head-on convergence paths. Option D invents a non-existent 150 m vertical separation requirement.
Correct: B)
Explanation: When a glider sustains major damage (70%) without injuries, the pilot must notify the local police within 24 hours. Option A (FOCA report in 3 days) does not meet the urgency required. Option C (immediate REGA notification) is the procedure for accidents involving injuries or fatalities. Option D (report within a week) is too slow for an incident involving 70% airframe damage.
Correct: D)
Explanation: On a hard paved runway, a glider's main wheel has less rolling resistance compared to grass, which can affect the ground roll characteristics. Additionally, on pavement the aircraft may weathervane more easily. Option A is not specific to hard runways. Option B (pulling back longer) could cause the tail to strike the runway. Option C (wheel brake at start) would impede acceleration during the most critical phase.
Correct: B)
Explanation: For a water landing, the pilot should tighten all harnesses, close ventilation openings to slow water ingress, and approach at slightly above normal speed with gear retracted. Option A (tail-first) risks a violent pitch-forward on impact. Option C (extending gear) would cause the wheels to catch the water and likely flip the aircraft. Option D (sideslip) creates an asymmetric water entry that could cartwheel the aircraft.
Correct: C)
Explanation: The most reliable method for determining wind direction from the air is to observe the glider's drift during altitude-loss spirals. The direction the aircraft drifts indicates the downwind direction, and the amount of drift indicates wind strength. This works at any altitude and any location. Options A (tree leaves) and B (wheat patterns) require being low enough to see detail. Option D (livestock) is unreliable as a wind indicator.
Correct: B)
Explanation: When overtaking a slower glider on a ridge, always pass on the valley side (away from the slope) to maintain safe terrain clearance and avoid trapping the other pilot against the hillside. Option A (turning back) is unnecessary and wastes energy. Option C (radio contact) takes too long at closing speed. Option D (diving below) risks flying into the turbulent rotor zone closer to the terrain.
Correct: C)
Explanation: If the glider rolls over the slack tow rope, the rope can become entangled with the landing gear or other structures. The immediate action is to release the rope before any entanglement can occur. Option A (braking) does not prevent entanglement. Option B (airbrakes) is irrelevant to the immediate hazard. Option D (radio warning) wastes time during a situation requiring instant action.
Correct: B)
Explanation: Glider flights are permitted in Class C airspace under specific conditions: the pilot must hold the radiotelephony extension, receive ATC authorization, and maintain continuous radio contact. Certain exceptions for gliders may be published on the soaring chart. Option A assumes gliders carry transponders, which most do not. Option C ignores mandatory ATC clearance and radio requirements. Option D incorrectly implies Class C is open by default.
Correct: B)
Explanation: When meeting an oncoming glider while ridge soaring, give way by turning away from the slope (toward the valley). Both pilots should take evasive action by moving away from the ridge. Option A (diving) risks terrain collision. Option C (climbing) may not be possible. Option D (maintaining heading) leads directly to a head-on collision.
Correct: C)
Explanation: With a tailwind on a limited field, fly slightly above minimum speed to minimize groundspeed at touchdown, and approach at a lower height to steepen the approach angle relative to the ground. Option A (best glide speed) is faster than needed and wastes field length. Option B (sideslip) addresses crosswind, not tailwind. Option D (faster approach) would increase groundspeed and ground roll on an already short field.
Correct: B)
Explanation: A waterlogged grass runway increases rolling resistance because the wheels sink into the soft, saturated surface, creating drag that slows acceleration. This results in a significantly longer takeoff distance. Option A ignores the substantial difference between conditions. Option D's logic is flawed because waterlogged grass creates suction and drag that impede acceleration, not help it.
Correct: B)
Explanation: The preferred action is always to fly over the power line. However, if altitude is insufficient and no alternative exists, passing under the line is acceptable as a last resort, between the pylons where cable sag provides maximum clearance. Option A (always fly over) is not possible when altitude is insufficient. Option C (tight turn near ground) risks a stall-spin accident. Option D (near a pylon) is where clearance is minimal because the cables attach at the top.
Correct: C)
Explanation: The standard spin recovery sequence is: (1) identify the spin direction, (2) apply full opposite rudder to stop the rotation, (3) keep ailerons neutral because aileron input during a spin can be counterproductive, (4) ease the stick slightly forward to reduce the angle of attack below the stall angle, and (5) once rotation stops, centralize rudder and smoothly pull out. Option A omits identifying spin direction. Option B uses ailerons, which can deepen the spin. Option D uses ailerons instead of rudder as primary anti-spin control.
