FAA Glider Pilot Certificate (Knowledge Test) — Questions and Answers

Question 1: A glider pilot notices the yaw string is missing from the canopy before departure. What should the pilot do?

Replace or substitute it before flight, as it is the primary slip/skid indicator for gliders (Correct answer)
Proceed with flight, relying solely on the slip/skid ball
Delay flight until an instrument technician inspects the aircraft
File a maintenance log entry and defer the item

Correct answer: Replace or substitute it before flight, as it is the primary slip/skid indicator for gliders

The yaw string is the primary and most sensitive coordination indicator in a glider; flying without it removes the pilot's main tool for detecting uncoordinated flight.

Question 2: What is the first action a pilot should take if a wingtip strikes the ground during landing?

Apply full opposite aileron.
Hold the wings level and gently correct with rudder. (Correct answer)
Apply full brakes.
Immediately release the controls.

Correct answer: Hold the wings level and gently correct with rudder.

Maintaining control and avoiding overcorrection is critical to prevent a ground loop or further damage.

Question 3: What does inspecting the glider's control surfaces for 'full and free movement' verify?

That controls move completely through their range without obstruction or restriction (Correct answer)
That ailerons are neutrally balanced
That the rudder pedals are adjusted for the pilot
That the yaw string is properly attached

Correct answer: That controls move completely through their range without obstruction or restriction

Full and free movement checks confirm that no control linkage is jammed, disconnected, or restricted, which is critical for safe flight control.

Question 4: What pre-flight check is critical for ensuring the emergency parachute system is functional?

Checking the expiration date on the parachute label.
Ensuring the parachute is properly packed and secured. (Correct answer)
Weighing the parachute.
Testing the deployment mechanism in flight.

Correct answer: Ensuring the parachute is properly packed and secured.

Ensuring the emergency parachute is properly packed and secured is a critical pre-flight check for glider pilots. This verification confirms that the parachute will deploy reliably and function as intended in an emergency situation. Proper packing and securing are paramount for pilot safety and the effective operation of the system.

Question 5: A VFR-rated glider pilot inadvertently flies into a cloud and loses all outside visual references. To prevent a spiral dive and exit the instrument meteorological conditions (IMC), what is the most appropriate course of action?

Deploy full spoilers/airbrakes immediately to increase stability and descend out of the cloud.
Trust the instruments, make a gentle 180-degree turn, and maintain a constant airspeed, keeping control inputs smooth. (Correct answer)
Ignore the instruments and rely on the feeling of G-forces to keep the wings level.
Pull back on the control stick to slow the aircraft down to near stall speed, minimizing control sensitivity.

Correct answer: Trust the instruments, make a gentle 180-degree turn, and maintain a constant airspeed, keeping control inputs smooth.

When a VFR pilot enters IMC, spatial disorientation is the greatest threat. The correct procedure is to trust the instruments, not bodily sensations. The primary goal is to initiate a gentle, standard-rate 180-degree turn to reverse course and fly out of the cloud. The pilot should make only small, smooth control inputs while focusing on the basic instruments to maintain a constant airspeed and prevent over-controlling, which can lead to a spiral dive.

Question 6: During a final approach, a pilot realizes they are too high but on the correct flight path. To lose altitude without a significant increase in airspeed, which maneuver is most appropriate?

A forward slip (Correct answer)
A chandelle
A sideslip
A steep spiral dive

Correct answer: A forward slip

A forward slip is a maneuver used specifically to increase the rate of descent without increasing airspeed. It is performed by cross-controlling the ailerons and rudder to present the side of the fuselage to the relative wind, creating significant drag. A sideslip is used to counteract drift in a crosswind landing.

Question 7: During a winch launch, the cable breaks when the glider is at an altitude of approximately 150 feet AGL with a steep nose-up attitude. Which of the following actions is the most critical and must be performed FIRST?

Pull the cable release handle twice to ensure the remaining cable is jettisoned.
Attempt a gentle 180-degree turn to land back at the launch point.
Transmit a radio call declaring the emergency.
Promptly and positively lower the nose to establish a safe flying speed. (Correct answer)

Correct answer: Promptly and positively lower the nose to establish a safe flying speed.

The most immediate danger after a winch cable break at a high pitch attitude is a stall followed by a potential spin. The pilot's first and most critical action must be to lower the nose to reduce the angle of attack and establish a safe flying speed. All other actions, such as releasing the remaining cable or planning the landing, are secondary to flying the aircraft and preventing a loss of control.

Question 8: A glider's annual inspection must be performed by:

A sport pilot with a glider endorsement
Any certificated private pilot with a glider rating
An FAA designated pilot examiner
An FAA certificated airframe and powerplant mechanic with inspection authorization (IA) (Correct answer)

Correct answer: An FAA certificated airframe and powerplant mechanic with inspection authorization (IA)

14 CFR Part 43 requires that annual inspections be performed by a mechanic holding an Inspection Authorization (IA).

Question 9: A pilot in a glider without flaps or a retractable undercarriage needs to significantly increase the rate of descent without a corresponding increase in airspeed. Which control system should be used?

Elevator
Rudder
Ailerons
Spoilers/Air Brakes (Correct answer)

Correct answer: Spoilers/Air Brakes

Spoilers, also known as air brakes, are deployed from the wings to disrupt airflow, which simultaneously decreases lift and increases drag. This allows the pilot to increase the glider's descent angle for landing or to escape strong lift without building up excessive airspeed.

Question 10: While performing a coordinated right turn in a glider, how are the primary flight controls manipulated?

Stick moves back, right rudder pedal is pressed.
Stick moves left, right rudder pedal is pressed.
Stick moves right, right rudder pedal is pressed. (Correct answer)
Stick moves right, left rudder pedal is pressed.

Correct answer: Stick moves right, right rudder pedal is pressed.

To initiate a coordinated right turn, the pilot moves the control stick to the right to actuate the ailerons, causing the glider to roll. Simultaneously, the pilot applies right rudder pressure to counteract adverse yaw and keep the nose of the glider aligned with the flight path. Elevator back pressure is then typically required to maintain altitude in the turn.

Question 11: Which logbook entry is required after a 100-hour inspection on a glider used for hire?

A signed return-to-service entry by a certificated A&P mechanic (Correct answer)
An entry signed by the glider club president
A notation by the FBO operations manager
An endorsement by the pilot in command

Correct answer: A signed return-to-service entry by a certificated A&P mechanic

After a 100-hour inspection, a certificated A&P mechanic must make a signed return-to-service entry in the aircraft maintenance records.

Question 12: What color does a glider's airworthiness certificate placard display?

White with blue lettering (Correct answer)
Yellow
Green
Pink

Correct answer: White with blue lettering

Standard US airworthiness certificates are printed on white cardstock with blue lettering and must be displayed in the aircraft.

Question 13: As per Canadian Aviation Regulations (CARs), which documents must the pilot of a privately registered glider carry on board during a cross-country flight?

Pilot licence with medical declaration, Certificate of Registration, Certificate of Airworthiness, and the Pilot Operating Handbook. (Correct answer)
Certificate of Registration, Certificate of Airworthiness, and proof of insurance.
Pilot licence, medical certificate, and the aircraft's journey log book.
Photo ID, pilot licence, and a copy of the glider's annual inspection report.

Correct answer: Pilot licence with medical declaration, Certificate of Registration, Certificate of Airworthiness, and the Pilot Operating Handbook.

CARs require the pilot to carry their licence and medical certificate (or declaration). For the aircraft, the required documents to be carried on board are the Certificate of Registration (CAR 202.26), Certificate of Airworthiness, and the Pilot Operating Handbook/Aircraft Flight Manual (CAR 605.04). The journey log is not required to be on board for a domestic flight that plans to return to the point of departure. Proof of insurance must be available but is not required to be carried in the aircraft.

Question 14: While on a cross-country flight, a glider pilot encounters a strong headwind when flying between thermals. To maximize the distance covered over the ground, the pilot should:

Fly at the minimum sink speed.
Fly at the normal best L/D speed.
Fly faster than the best L/D speed. (Correct answer)
Fly slower than the best L/D speed.

Correct answer: Fly faster than the best L/D speed.

When flying into a headwind, a pilot must increase their airspeed above the still-air best L/D speed to maximize ground distance. This increased speed reduces the time spent in the sinking air mass between thermals, covering more ground for the altitude lost. A common rule of thumb is to add about half the estimated headwind speed to the best L/D speed.

Question 15: What weather phenomenon is most hazardous to glider pilots due to sudden downdrafts?

Fog.
Light rain.
High cirrus clouds.
Microburst. (Correct answer)

Correct answer: Microburst.

Microbursts are intense, localized downdrafts that can cause rapid altitude loss and are extremely dangerous for gliders.

Question 16: What is the correct sequence for entering a thermal?

Steep bank immediately, then tighten
Shallow initial bank, then adjust as needed (Correct answer)
Fly straight through without turning
Sideslip into the thermal

Correct answer: Shallow initial bank, then adjust as needed

Proper thermal entry maximizes lift capture.

Question 17: What information does a glider's weight and balance document establish?

Only the maximum gross weight allowed
Minimum airspeed for all phases of flight
The wing loading at various bank angles
Maximum gross weight, empty weight, CG envelope, and useful load (Correct answer)

Correct answer: Maximum gross weight, empty weight, CG envelope, and useful load

Weight and balance documents define the CG envelope and weight limits that keep the glider within its certified structural and handling characteristics.

Question 18: Under FAA regulations, how long must a pilot wait after consuming alcohol before acting as pilot in command?

12 hours
8 hours (Correct answer)
4 hours
24 hours

Correct answer: 8 hours

FAA regulation 14 CFR 91.17 requires at least 8 hours between consuming alcohol and acting as PIC, and a blood alcohol level below 0.04%.

Question 19: Which of the following atmospheric conditions is most conducive to the formation of strong mountain wave lift suitable for soaring?

A shallow layer of warm air aloft with light and variable winds at all altitudes.
A moist, unstable air mass with strong convective activity and winds parallel to the mountain range.
A stable air mass with wind speed of at least 15-25 knots at the summit, increasing with altitude, and blowing within 30 degrees perpendicular to the ridge. (Correct answer)
An unstable air mass with wind speed decreasing with altitude.

Correct answer: A stable air mass with wind speed of at least 15-25 knots at the summit, increasing with altitude, and blowing within 30 degrees perpendicular to the ridge.

Strong mountain wave lift requires three key ingredients: a stable air mass, significant wind speed at ridge-top level (at least 15-25 knots), and a wind direction that is roughly perpendicular to the mountain range. [2, 6, 10] The stability prevents air from rising in thermals and instead forces it to oscillate in a wave pattern after flowing over the mountain. The wind must be strong enough to create the wave and should ideally increase with altitude to sustain the wave's energy. [2, 3, 6] Unstable air, decreasing wind speed, parallel winds, or light/variable winds are all detrimental to wave formation. [2]

Question 20: What weather condition is indicated by lenticular clouds?

Calm, clear skies.
Low humidity.
Strong mountain wave activity. (Correct answer)
Approaching warm front.

Correct answer: Strong mountain wave activity.

Lenticular clouds form in mountainous regions and indicate strong, turbulent winds aloft.

Question 21: Which document is NOT required to be on board a glider during flight operations?

Pilot's logbook (Correct answer)
Airworthiness certificate
FAA-approved flight manual or POH
Aircraft registration

Correct answer: Pilot's logbook

The pilot's logbook is a personal record that must be available for inspection by the FAA but is not required to be carried in the aircraft itself.

Question 22: Which of the following aerodynamic forces acts perpendicular to the relative wind?

Drag
Thrust
Weight
Lift (Correct answer)

Correct answer: Lift

By definition, lift is the aerodynamic force that acts perpendicular to the direction of the relative wind. Drag acts parallel to the relative wind, and weight acts vertically toward the center of the Earth. A glider has no thrust.

Question 23: A glider pilot wants to maximize the time spent in the air to take advantage of a thermal. Which speed should the pilot aim to fly at?

Maneuvering speed (Va)
Minimum sink speed (Correct answer)
Best lift/drag ratio (L/D max) speed
Never exceed speed (Vne)

Correct answer: Minimum sink speed

Minimum sink speed is the airspeed at which the glider has the lowest rate of descent, thus maximizing the time it can stay aloft. This is the ideal speed for circling in a thermal to gain altitude. Best L/D max speed maximizes distance covered, not time.

Question 24: When navigating using a sectional chart, what does a blue dashed line typically represent?

A power line
Class D airspace ceiling (Correct answer)
A river or waterway
A hiking trail

Correct answer: Class D airspace ceiling

On a sectional chart, a blue dashed line typically represents the lateral limits of Class D airspace. The ceiling of this airspace is usually indicated by a number within a box, often followed by a 'T' for 'thousand feet MSL' (Mean Sea Level). This visual cue helps pilots understand airspace boundaries and restrictions, ensuring compliance with air traffic regulations.

Question 25: Which of the following is a primary hazard associated with flying in the rotor zone of a mountain wave system?

Severe to extreme turbulence and strong downdrafts. (Correct answer)
Widespread fog and poor visibility.
Consistent, widespread updrafts of over 1,000 feet per minute.
Extremely smooth, laminar airflow.

Correct answer: Severe to extreme turbulence and strong downdrafts.

The rotor is an area of extreme turbulence that forms at low altitudes on the lee side of a mountain, underneath the primary wave crests. [3, 10] It is characterized by chaotic, rotating air masses that can produce severe to extreme turbulence, strong updrafts, and powerful downdrafts, posing a significant structural and control hazard to any aircraft, especially gliders. [3, 10] The air in the rotor is anything but smooth.

Question 26: A glider's pitot-static system provides data for which combination of instruments?

Airspeed indicator, compass, and variometer
Altimeter, attitude indicator, and airspeed indicator
Vertical speed indicator, yaw string, and altimeter
Airspeed indicator, altimeter, and vertical speed indicator (variometer) (Correct answer)

Correct answer: Airspeed indicator, altimeter, and vertical speed indicator (variometer)

The pitot-static system measures and compares ram air pressure (from the pitot tube) and static pressure (from the static port). This information is used by the airspeed indicator, the altimeter (which uses only static pressure), and the vertical speed indicator or variometer (which measures the rate of change of static pressure).

Question 27: When operating a glider in uncontrolled Class G airspace in Canada, which of the following is true?

All flights must be conducted under a flight plan filed with NAV CANADA.
A transponder is mandatory for all flights above 3,000 feet AGL.
The pilot is exempt from all Canadian Aviation Regulations (CARs).
The pilot must still adhere to regulations concerning minimum altitudes and distances from persons or property. (Correct answer)

Correct answer: The pilot must still adhere to regulations concerning minimum altitudes and distances from persons or property.

While Class G is uncontrolled airspace, pilots are not exempt from all regulations. The Canadian Aviation Regulations (CARs) regarding minimum safe altitudes and distances from people, vessels, vehicles, and structures on the surface still apply.

Question 28: A glider pilot is flying in the Southern Domestic Airspace of Canada at an altitude above 3,000 feet AGL. According to the cruising altitude order, which altitudes are appropriate for a magnetic track of 270°?

Even thousands of feet ASL. (Correct answer)
Even thousands of feet plus 500 feet ASL.
Odd thousands of feet ASL.
Odd thousands of feet plus 500 feet ASL.

Correct answer: Even thousands of feet ASL.

When flying VFR in the Southern Domestic Airspace at more than 3,000 feet AGL, an aircraft on a magnetic track between 180° and 359° (westerly) must fly at an even thousand-foot altitude (e.g., 4,000', 6,000'). Eastbound traffic uses odd thousands.

Question 29: During a pre-flight inspection, you notice the yaw string is frayed and partially detached. What is the primary consequence of flying with a malfunctioning yaw string?

The variometer will show a constant climb.
Incorrect altitude indications in windy conditions.
Difficulty in maintaining coordinated flight. (Correct answer)
Inaccurate airspeed readings during turns.

Correct answer: Difficulty in maintaining coordinated flight.

The yaw string is a simple and crucial instrument that indicates whether the glider is in coordinated flight. It shows the direction of the relative wind. A malfunctioning yaw string makes it difficult for the pilot to sense and correct for adverse yaw, leading to inefficient and uncoordinated turns.

Question 30: If the static port on a glider becomes blocked during flight, how will the altimeter and airspeed indicator be affected?

The altimeter will freeze at the altitude where the blockage occurred, and the airspeed indicator will be inaccurate. (Correct answer)
Both instruments will read zero.
The altimeter will indicate a continuous climb, and the airspeed indicator will read higher than actual.
The altimeter will be unaffected, but the airspeed indicator will read zero.

Correct answer: The altimeter will freeze at the altitude where the blockage occurred, and the airspeed indicator will be inaccurate.

If the static port becomes blocked, the altimeter will no longer sense changes in ambient air pressure and will remain fixed at the altitude of the blockage. The airspeed indicator will also be affected; it will read lower than the actual airspeed as the glider descends and higher than the actual airspeed as it climbs from the altitude where the blockage occurred, because the trapped static pressure is no longer correct for the current altitude.

Question 31: What is the term for the boundary between two different air masses?

Thermal inversion.
Jet stream.
Dew point.
Front. (Correct answer)

Correct answer: Front.

A front is the transition zone between two air masses with different temperature and humidity characteristics.

Question 32: What is the primary cause of loss of control accidents in general aviation, including gliders?

Mechanical failure of primary controls
Pilot decision-making errors and distraction (Correct answer)
Sudden unexpected weather changes
Air traffic control errors

Correct answer: Pilot decision-making errors and distraction

FAA accident data consistently shows that pilot decision-making errors and distraction are the leading causes of loss of control accidents.

Question 33: Which airspace class requires an explicit ATC clearance (not just radio contact) before entry?

Class E
Class D
Class C
Class B (Correct answer)

Correct answer: Class B

Class B airspace requires an explicit ATC clearance before entry, not just two-way radio communication.

Question 34: What is the primary function of a total energy compensated variometer?

To measure the potential energy of the glider based on its altitude.
To provide an audible warning of excessive airspeed.
To indicate the rate of climb or descent due only to the movement of the surrounding air mass. (Correct answer)
To show the glider's vertical speed relative to the ground.

Correct answer: To indicate the rate of climb or descent due only to the movement of the surrounding air mass.

A total energy (TE) compensated variometer filters out changes in vertical speed caused by the pilot's control inputs (i.e., converting kinetic energy to potential energy, or 'stick thermals'). It aims to only show the vertical movement of the air the glider is flying through, which is crucial for locating and utilizing thermals for soaring.

Question 35: Which of the following airspace classes in Canada requires all aircraft, including gliders operating under VFR, to receive an ATC clearance before entry?

Class C (Correct answer)
Class E
Class G
Class D

Correct answer: Class C

Class C airspace requires that all VFR flights receive a clearance from Air Traffic Control before entering. ATC provides separation between IFR and VFR aircraft.

Question 36: Under the Canadian Aviation Regulations (CARs), what is the minimum age requirement to be issued a Pilot Licence - Glider?

16 years old (Correct answer)
18 years old
15 years old
14 years old

Correct answer: 16 years old

According to the regulations governing pilot licensing in Canada, an applicant for a Private Pilot Licence - Glider must be at least 16 years of age. The minimum age for a student pilot to solo is 14.

Question 37: How often must an altimeter and static pressure system be tested for IFR flight?

Every 24 calendar months (Correct answer)
Every 12 calendar months
Before each IFR flight
Every 36 calendar months

Correct answer: Every 24 calendar months

14 CFR 91.411 requires altimeter and static system tests every 24 calendar months for IFR operations.

Question 38: What is the primary cause of wind?

Differences in atmospheric pressure. (Correct answer)
Rotation of the Earth.
Ocean currents.
Magnetic fields.

Correct answer: Differences in atmospheric pressure.

Wind is caused by differences in atmospheric pressure due to uneven heating of the Earth's surface.

Question 39: During a winch launch, the cable breaks at an altitude of 300 feet. There is insufficient runway remaining to land straight ahead, but the wind is calm. What is the correct recovery procedure?

Pull up to trade speed for altitude before turning back.
Deploy full airbrakes and perform a stall to land with minimal forward speed.
Push the stick forward to establish a safe airspeed, then perform a modified, abbreviated circuit to land into the wind. (Correct answer)
Immediately initiate a steep 180-degree turn to land downwind.

Correct answer: Push the stick forward to establish a safe airspeed, then perform a modified, abbreviated circuit to land into the wind.

The first and most critical action after a cable break is to push the stick forward to lower the nose and establish a safe flying speed to prevent a stall. At 300 feet, there is typically enough altitude to perform a shortened, tear-drop shaped pattern (an abbreviated circuit) to align with the runway for a landing into the wind, which is safer than a downwind landing. A direct 180-degree turn at low altitude risks a stall/spin.

Question 40: What is the primary reason high-performance gliders are designed with long, slender wings (a high aspect ratio)?

To increase the stall speed
To reduce induced drag (Correct answer)
To improve maneuverability at low speeds
To increase parasite drag

Correct answer: To reduce induced drag

A high aspect ratio (the ratio of wingspan to wing chord) reduces induced drag. Induced drag is a byproduct of lift and is most significant at lower airspeeds. By minimizing this type of drag, the glider achieves a higher lift-to-drag ratio, resulting in better glide performance.

Question 41: What is the first step in the DECIDE model for aeronautical decision making?

Do the best alternative
Choose a course of action
Detect a change or problem (Correct answer)
Estimate the need to counter the problem

Correct answer: Detect a change or problem

The DECIDE model begins with Detect — recognizing that a change or hazard has occurred and requires a pilot response.

Question 42: Which cloud type is most likely to produce thunderstorms?

Altostratus.
Cumulonimbus. (Correct answer)
Cirrus.
Stratus.

Correct answer: Cumulonimbus.

Cumulonimbus clouds are large, vertically developed clouds associated with thunderstorms and severe weather.

Question 43: When utilizing ridge lift, what is the correct procedure for making turns while flying below the crest of the ridge?

Turns can be made in either direction as long as a safe distance from the terrain is maintained.
All turns should be made away from the ridge. (Correct answer)
Perform steep 360-degree turns to quickly gain altitude.
All turns should be made toward the ridge to stay in the strongest lift.

Correct answer: All turns should be made away from the ridge.

For safety, when flying below the crest of a ridge, all turns should be made away from the rising terrain. [23] Turning towards the ridge significantly reduces the margin for error, increases the risk of collision with the terrain, and can place the glider in the sink on the downwind side of the turn. Turning away from the ridge ensures the glider moves into an area with more clearance and provides a clear escape route if lift weakens or unexpected sink is encountered. [23]

Question 44: How does increasing the all-up weight of a glider (e.g., by adding water ballast) affect its performance, assuming the pilot flies at the correct corresponding airspeeds?

It increases the best glide ratio (L/D max).
It decreases the best glide ratio (L/D max).
It has no effect on the best glide ratio but increases the best glide speed. (Correct answer)
It decreases both the best glide speed and the minimum sink speed.

Correct answer: It has no effect on the best glide ratio but increases the best glide speed.

A glider's lift-to-drag ratio (L/D max), which determines its best glide angle, is an aerodynamic property of its design and is not affected by weight. However, to achieve that same L/D ratio at a higher weight, the glider must fly at a higher airspeed. The minimum sink rate will also increase, but the glide ratio for a given starting altitude remains the same.

Question 45: Which frequency is designated as the international aeronautical emergency frequency?

123.45 MHz
121.5 MHz (Correct answer)
126.7 MHz
122.8 MHz

Correct answer: 121.5 MHz

121.5 MHz is the international emergency frequency monitored by ATC facilities and search and rescue services.

Question 46: A pilot is planning a cross-country thermal flight. Which weather characteristic would be MOST detrimental to a successful soaring day?

A high-pressure system with a strong capping inversion at a low altitude. (Correct answer)
A light surface wind that increases to 15 knots at 3,000 feet.
Scattered cumulus clouds with bases at 6,000 feet AGL.
A dry adiabatic lapse rate from the surface up to 8,000 feet.

Correct answer: A high-pressure system with a strong capping inversion at a low altitude.

A strong capping inversion at a low altitude acts like a lid on the atmosphere, preventing warm air parcels (thermals) from rising very high. [11, 12] Even if the sun heats the ground effectively, the thermals will be stopped by this stable layer, resulting in weak, short-lived lift and making it impossible to gain significant altitude for a cross-country flight. The other options are generally favorable: scattered cumulus clouds mark thermals, increasing wind can help organize thermals into streets, and a dry adiabatic lapse rate indicates instability needed for thermals to form. [11, 15, 31]

Question 47: You are on a cross-country flight in your glider and approaching a Class D control zone. What must you do before entering this airspace?

Nothing, as gliders are exempt from communication requirements in Class D airspace.
Obtain a special VFR clearance from ATC, regardless of the weather conditions.
Ensure your transponder is set to the designated code for glider operations.
Establish two-way radio communication with the appropriate Air Traffic Control (ATC) unit. (Correct answer)

Correct answer: Establish two-way radio communication with the appropriate Air Traffic Control (ATC) unit.

To operate under VFR in Class D airspace, pilots must establish two-way radio communication with the appropriate ATC unit prior to entry and maintain it while within the airspace.

Question 48: An atmospheric sounding indicates a steep lapse rate, where the temperature decreases rapidly with altitude (more than 3°C per 1,000 feet). This condition is described as:

Stable, and poor for thermal development.
Atmospherically neutral.
A strong temperature inversion.
Unstable, and favorable for thermal development. (Correct answer)

Correct answer: Unstable, and favorable for thermal development.

An unstable atmosphere is characterized by a steep lapse rate, meaning the temperature drops quickly with an increase in altitude. [7, 16, 32] When a parcel of air near the surface is heated, it becomes warmer (and less dense) than the surrounding air and begins to rise. [35] In an unstable environment, this rising parcel will remain warmer than the surrounding air as it ascends, causing it to continue accelerating upward, thus forming strong thermals suitable for soaring. [7, 8, 32] A stable atmosphere or an inversion would suppress this vertical motion. [28, 35]

Question 49: A glider pilot is planning a flight that will pass through a designated Class F advisory (CYA) airspace. What is required of the pilot before entering this airspace?

The pilot must file a flight plan and receive a specific clearance.
The pilot must establish two-way radio communication with the controlling agency.
The pilot is restricted from entering this airspace under all circumstances.
No specific permission is required, but the pilot should be aware of the nature of the advisory area. (Correct answer)

Correct answer: No specific permission is required, but the pilot should be aware of the nature of the advisory area.

Class F advisory airspace (CYA) is designated for activities like flight training, hang gliding, or military operations. While no special permission is required for VFR aircraft to enter, pilots should be aware of the activities within and exercise caution.

Question 50: What does the ADM acronym stand for in aviation?

Altitude Deviation Management
Aeronautical Decision Making (Correct answer)
Aircraft Diagnostic Method
Airspace Deviation Monitor

Correct answer: Aeronautical Decision Making

Aeronautical Decision Making is the structured approach to consistently making sound choices in complex and dynamic flight environments.

Question 51: What is the primary purpose of a glider's flight computer?

To track other aircraft in the area
To monitor engine performance
To calculate glide ratios and wind corrections (Correct answer)
To control the aircraft's radio systems

Correct answer: To calculate glide ratios and wind corrections

A glider's flight computer, often called a variometer or flight management system, is primarily used to optimize flight performance. It calculates critical data such as the glider's current glide ratio, provides information on thermal strength, and helps pilots make wind corrections to maximize distance and efficiency during cross-country flights. It does not control radio systems or monitor engine performance, as gliders are engineless.

Question 52: What does CTAF stand for in aviation communications?

Controlled Traffic Advisory Function
Certified Terminal Approach Frequency
Common Terminal Airfield Frequency
Common Traffic Advisory Frequency (Correct answer)

Correct answer: Common Traffic Advisory Frequency

CTAF stands for Common Traffic Advisory Frequency, the designated frequency for self-announce position reports at non-towered airports.

Question 53: Which of the following is a symptom of hyperventilation that a glider pilot might experience at high altitude?

Increased alertness and sharp vision
Tunnel vision only
Tingling in the fingers and lightheadedness (Correct answer)
Elevated heart rate with no dizziness

Correct answer: Tingling in the fingers and lightheadedness

Hyperventilation causes excessive CO2 expulsion, leading to tingling extremities, lightheadedness, and potentially fainting if not corrected.

Question 54: When using a VFR Navigation Chart (VNC) for pilotage, which of the following features is MOST useful for a glider pilot to quickly and accurately confirm their position?

The boundaries of remote Class G airspace.
Maximum Elevation Figures (MEFs) within a quadrangle.
Isogonic lines showing magnetic variation.
Distinctive patterns formed by intersecting railways, highways, rivers, or the unique shape of a lake. (Correct answer)

Correct answer: Distinctive patterns formed by intersecting railways, highways, rivers, or the unique shape of a lake.

Pilotage is navigation by reference to visible landmarks. The most effective way to confirm a position is to identify a unique, unambiguous pattern on the ground and match it to the chart. Intersections of linear features like roads, rivers, and railways create such patterns, as do distinctively shaped lakes or towns. While MEFs and isogonic lines are crucial for planning, they are not used for in-flight visual position fixing.

Question 55: A pilot is flying a glider with a published best glide ratio of 40:1 in still air. From an altitude of 5,280 feet above the ground, what is the maximum horizontal distance the glider can travel?

211,200 feet (Correct answer)
52.8 nautical miles
40 statute miles
40 nautical miles

Correct answer: 211,200 feet

A glide ratio of 40:1 means the glider can travel 40 feet horizontally for every 1 foot of altitude lost. From 5,280 feet (1 statute mile) of altitude, the maximum horizontal distance is 40 times the altitude: 40 * 5,280 feet = 211,200 feet. This is equivalent to 40 statute miles.

Question 56: What is the primary purpose of using rudder during a glider turn?

To decrease airspeed
To activate the spoilers
To maintain coordinated flight (Correct answer)
To increase the turn rate

Correct answer: To maintain coordinated flight

During a glider turn, the rudder is primarily used in conjunction with the ailerons to maintain coordinated flight. Coordinated flight means the glider is turning without slipping (moving sideways towards the inside of the turn) or skidding (moving sideways towards the outside of the turn). This is essential for efficiency, comfort, and preventing stalls, ensuring smooth and safe maneuvers.

Question 57: What does a rising barometric pressure typically indicate?

Heavy precipitation.
Stable or improving weather. (Correct answer)
Approaching storm.
Increased turbulence.

Correct answer: Stable or improving weather.

Rising pressure usually means improving weather conditions, while falling pressure suggests worsening weather.

Question 58: While on the final approach for landing, a pilot finds that the spoilers/airbrakes are jammed and will not extend. The glider is currently high on the ideal glide path. What is the recommended corrective action?

Increase the pitch attitude to slow the glider down and reduce the glide ratio.
Perform a series of S-turns on the final approach to extend the flight path.
Initiate a forward slip to increase drag and steepen the descent path without a significant increase in airspeed. (Correct answer)
Maintain normal approach speed but plan for a much longer landing roll and potential overshoot.

Correct answer: Initiate a forward slip to increase drag and steepen the descent path without a significant increase in airspeed.

A forward slip is the primary method for increasing the rate of descent when spoilers or airbrakes are inoperative. By applying rudder and opposite aileron, the pilot presents the side of the fuselage to the relative wind, creating significant drag. This allows for a steeper, more controlled descent angle without the airspeed increasing excessively, enabling the pilot to correct a high approach and still land in the desired area.

Question 59: During an off-field landing, the pilot establishes a "high key" position. What is the primary purpose of this specific point in the emergency landing pattern?

To act as a high-altitude reference point from which a shortened circuit can be reliably flown, ensuring the field is reachable. (Correct answer)
To signal to other aircraft the intention to land by flying directly over the center of the field.
To be the point where the pre-landing checklist is initiated for the first time.
To serve as the final go/no-go decision point for committing to the chosen field.

Correct answer: To act as a high-altitude reference point from which a shortened circuit can be reliably flown, ensuring the field is reachable.

The "high key" position, typically upwind of the landing area at a specific altitude (e.g., 800-1000 ft AGL), is a crucial reference point in a planned off-field landing pattern. Its purpose is to ensure the pilot has sufficient altitude (potential energy) to assess the field, plan and fly a circuit (downwind, base, final), and adjust for wind, guaranteeing they can reach the landing threshold with adequate energy to flare.

Question 60: What is the dew point?

The temperature inside a cloud.
The temperature at which air becomes saturated. (Correct answer)
The freezing point of water at altitude.
The highest temperature of the day.

Correct answer: The temperature at which air becomes saturated.

The dew point is the temperature at which air becomes saturated, leading to condensation (e.g., fog or dew).

FAA Glider Pilot Certificate (Knowledge Test)

The Glider Pilot Certificate knowledge test assesses an applicant's understanding of aeronautical knowledge required to safely operate a glider.

Questions

150 min

Time Limit

70%

To Pass

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