Exam quiz Weather - FAA Part 107 Drone Exam Prep

Question 1

Which combination of atmospheric conditions will result in the most optimal propeller efficiency?

Accepted Answer

Low temperature, low relative humidity, low density altitude.

Answer

High temperature, low relative humidity, high density altitude.

Answer

High temperature, high relative humidity, low density altitude.

Question 2

Sea breezes are caused by:

Accepted Answer

The fact that land heats faster than water during the day, causing air to rise over the land and cooler air from the water to flow in.

Answer

The rotation of the Earth pulling ocean currents inland.

Answer

The fact that water heats faster than land during the day.

Question 3

What does a SIGMET (Significant Meteorological Information) advise pilots about?

Accepted Answer

Non-convective weather that is potentially hazardous to all aircraft, such as severe icing, severe turbulence, or dust storms.

Answer

Weather conditions that are only hazardous to small, single-engine aircraft.

Answer

Routine forecasted weather at an aerodrome.

Question 4

What is the primary danger to a drone pilot when flying in an area with a strong temperature inversion?

Accepted Answer

Poor visibility due to trapped smoke, dust, and haze in the lower atmosphere, making VLOS difficult.

Answer

The battery will overheat due to the rapidly rising air.

Answer

The drone will be pushed uncontrollably upward into controlled airspace.

Question 5

What causes variations in altimeter settings between weather reporting points?

Accepted Answer

Unequal heating of the Earth's surface.

Answer

Variation of terrain elevation.

Answer

Coriolis force.

Question 6

In aviation meteorology, a 'ceiling' is defined as the height above the Earth's surface of the:

Accepted Answer

Lowest layer of clouds or obscuring phenomena that is reported as 'broken', 'overcast', or 'obscuration'.

Answer

Highest layer of clouds reported as scattered.

Answer

Lowest layer of clouds reported as scattered or broken.

Question 7

Which factor would tend to increase the density altitude at a given airport?

Accepted Answer

An increase in ambient temperature.

Answer

An increase in barometric pressure.

Answer

A decrease in relative humidity.

Question 8

In a TAF, what does the code 'WS010/31050KT' mean?

Accepted Answer

Non-convective low-level wind shear at 1,000 feet, wind from 310 degrees at 50 knots.

Answer

Weather system at 1,000 feet moving 310 degrees at 50 knots.

Answer

Wind storm warning: 10 miles visibility, winds 310 at 50 knots.

Question 9

Which of the following is a characteristic of an unstable air mass?

Accepted Answer

Good surface visibility and turbulence.

Answer

Poor surface visibility and smooth air.

Answer

Continuous, steady precipitation.

Question 10

When water vapor condenses, what typically forms?

Accepted Answer

Clouds and fog.

Answer

Strong winds.

Answer

A temperature inversion.

Question 11

What are the characteristics of stable air?

Accepted Answer

Poor visibility and steady precipitation.

Answer

Poor visibility and intermittent precipitation.

Answer

Good visibility and steady precipitation.

Question 12

The Coriolis force deflects winds to the ________ in the Northern Hemisphere.

Accepted Answer

Right.

Answer

Left.

Answer

South.

Question 13

What is 'Pressure Altitude'?

Accepted Answer

The altitude indicated when the barometric pressure scale is set to 29.92 inches of mercury (Hg).

Answer

The altitude read on an altimeter when set to the local barometric pressure.

Answer

The actual physical height of the aircraft above mean sea level.

Question 14

What is a characteristic of stable air?

Accepted Answer

Stratiform clouds.

Answer

Unlimited visibility.

Answer

Cumulus clouds.

Question 15

When does Density Altitude equal Pressure Altitude?

Accepted Answer

When the temperature is standard (15 °C at sea level).

Answer

When flying at exactly mean sea level.

Answer

When the humidity is 0%.

Question 16

What situation is most conducive to the formation of radiation fog?

Accepted Answer

Warm, moist air over low, flatland areas on clear, calm nights.

Answer

The movement of cold air over much warmer water.

Answer

Moist, tropical air moving over cold, offshore water.

Question 17

A lenticular cloud, which often looks like a flying saucer, is a strong indicator of:

Accepted Answer

Mountain wave turbulence and high winds aloft.

Answer

A high-pressure system forming.

Answer

Approaching radiation fog.

Question 18

A temperature inversion would most likely result in which weather condition?

Accepted Answer

An increase in temperature as altitude is increased.

Answer

Clouds with extensive vertical development above an inversion aloft.

Answer

Good visibility in the lower levels of the atmosphere and poor visibility above an inversion aloft.

Question 19

What is a 'squall line'?

Accepted Answer

A non-frontal, narrow band of active thunderstorms that often develop ahead of a cold front.

Answer

A line of low-level temperature inversions.

Answer

A continuous band of radiation fog.

Question 20

How does frost form on an aircraft?

Accepted Answer

When the temperature of the collecting surface is at or below the dew point of the adjacent air, and the dew point is below freezing.

Answer

When water drops freeze upon striking the aircraft's surface.

Answer

When flying through supercooled water droplets.

Question 21

Why are surface winds generally slower and cross the isobars at an angle compared to winds aloft?

Accepted Answer

Because of surface friction from terrain, trees, and buildings.

Answer

Because the Coriolis force is stronger at the surface.

Answer

Because the air is warmer at the surface.

Question 22

Which of the following is a characteristic of a stable air mass?

Accepted Answer

Stratiform clouds and smooth air.

Answer

Good visibility and showery precipitation.

Answer

Cumulus clouds and turbulence.

Question 23

What combination of atmospheric factors produces the highest density altitude?

Accepted Answer

High elevation, high temperature, and high humidity.

Answer

Low elevation, low temperature, and low humidity.

Answer

High elevation, low temperature, and high humidity.

Question 24

What visual cue can a remote pilot use to anticipate the presence of a microburst?

Accepted Answer

A rain shaft descending from a thunderstorm, especially if the rain evaporates before hitting the ground (virga), combined with a ring of blowing dust at the surface.

Answer

A perfectly clear, blue sky.

Answer

A layer of flat, low-lying stratus clouds.

Question 25

The conditions necessary for the formation of cumulonimbus clouds are a lifting action and

Accepted Answer

unstable, moist air.

Answer

either stable or unstable air.

Answer

unstable air containing an excess of condensation nuclei.

Question 26

A pilot experiencing the effects of hyperventilation should be able to restore the proper carbon dioxide level in the body by

Accepted Answer

slowing the breathing rate, breathing into a paper bag, or talking aloud.

Answer

breathing spontaneously and deeply or gaining mental control of the situation.

Answer

increasing the breathing rate in order to increase lung ventilation.

Question 27

What type of weather is generally associated with an advancing cold front?

Accepted Answer

Towering cumulus clouds, showery precipitation, and thunderstorms.

Answer

Stratiform clouds, widespread rain, and poor visibility.

Answer

Clear skies and calm winds.

Question 28

Every physical process of weather is accompanied by, or is the result of, a:

Accepted Answer

Heat exchange.

Answer

Movement of air.

Answer

Pressure differential.

Question 29

What are typical characteristics of unstable air?

Accepted Answer

Good visibility and showery precipitation.

Answer

Continuous, steady precipitation.

Answer

Fog and haze.

Question 30

If you are flying your sUAS and observe a sudden wind shift from a steady southerly breeze to a gusty northwest wind, accompanied by a drop in temperature, what has likely passed?

Accepted Answer

A cold front.

Answer

A warm front.

Answer

A high-pressure center.

Question 31

According to today's weather forecast, there will be a ceiling at 700 feet. Knowing this, up to what altitude are you allowed to fly your drone?

Accepted Answer

200 feet AGL.

Answer

500 feet AGL.

Answer

400 feet AGL.

Question 32

What type of weather is generally associated with a warm front?

Accepted Answer

Stratiform clouds, steady precipitation, and poor visibility ahead of the front.

Answer

Severe thunderstorms and tornadoes.

Answer

Rapidly dropping temperatures and clear skies.

Question 33

If you are flying a drone in an area with a high density altitude, you can expect your drone's propellers to:

Accepted Answer

Be less efficient because the air is 'thinner' and provides less bite.

Answer

Be more efficient because there is less air friction.

Answer

Generate exactly the same amount of thrust as at sea level.

Question 34

What does a 'broken' (BKN) cloud layer mean in a METAR report?

Accepted Answer

5/8 to 7/8 of the sky is covered by clouds, which constitutes a ceiling.

Answer

1/8 to 2/8 of the sky is covered by clouds.

Answer

3/8 to 4/8 of the sky is covered by clouds.

Question 35

What is a Convective SIGMET?

Accepted Answer

An advisory concerning convective weather significant to the safety of all aircraft, including tornadoes, lines of thunderstorms, and embedded thunderstorms.

Answer

An advisory warning of strong surface winds over 20 knots.

Answer

A standard weather forecast for high-altitude passenger jets.

Question 36

A remote PIC is planning a flight and notices the METAR reads 'FG'. The visibility is reported as 1/4 SM. Under Part 107, can the pilot legally fly?

Accepted Answer

No, Part 107 requires a minimum of 3 statute miles of flight visibility.

Answer

Yes, as long as the drone stays under 100 feet AGL.

Answer

Yes, if the pilot uses FPV goggles.

Question 37

Under what condition will the air become fully saturated?

Accepted Answer

When the temperature drops to equal the dew point.

Answer

When the barometric pressure drops below 29.92 Hg.

Answer

When the temperature rises significantly above the dew point.

Question 38

Why is 'clear ice' generally considered the most dangerous type of structural icing?

Accepted Answer

Because it is heavy, hard to see, alters the shape of the airfoil, and is difficult to remove.

Answer

Because it only forms at extremely high altitudes out of drone range.

Answer

Because it creates an electromagnetic field that disrupts the drone's compass.

Question 39

What is the expected duration of an individual microburst?

Accepted Answer

Seldom longer than 15 minutes from the time it strikes the ground until dissipation.

Answer

Up to an hour.

Answer

Between 30 and 45 minutes.

Question 40

Katabatic winds are characterized by:

Accepted Answer

Cold, dense air flowing downhill into a valley, typically at night.

Answer

Warm air rising up a mountain slope during the day.

Answer

High-altitude jet streams dipping into the lower atmosphere.

Question 41

An air mass that resists vertical movement is considered:

Accepted Answer

Stable.

Answer

Unstable.

Answer

Convective.

Question 42

At what altitude does wind shear occur?

Accepted Answer

At any altitude.

Answer

Below 5,000 feet AGL.

Answer

Above 20,000 feet MSL.

Question 43

Thunderstorms require three elements to form: high moisture, an unstable lapse rate (instability), and:

Accepted Answer

A lifting force (such as heating from below or a frontal boundary).

Answer

High barometric pressure.

Answer

A strong temperature inversion.

Question 44

What effect does haze have on the ability to see traffic or terrain features during flight?

Accepted Answer

All traffic or terrain features appear to be farther away than their actual distance.

Answer

Haze causes the eyes to focus at infinity.

Answer

The eyes tend to overwork in haze and do not detect relative movement easily.

Question 45

Ice pellets encountered at the surface are an indication that:

Accepted Answer

There is a temperature inversion with freezing rain at a higher altitude.

Answer

A thunderstorm is directly overhead.

Answer

The air mass is stable with no turbulence.

Question 46

What effect does a strong headwind have on a small UAS trying to fly from point A to point B?

Accepted Answer

It decreases the ground speed, meaning the drone will require more battery power and time to cover the same distance.

Answer

It increases the ground speed and reduces battery consumption.

Answer

It has no effect on ground speed, only on indicated airspeed.

Question 47

What is the primary cause of all changes in the Earth's weather?

Accepted Answer

Variation of solar energy received by the Earth's regions.

Answer

Changes in air pressure over the oceans.

Answer

The Coriolis force.

Question 48

What is the standard temperature lapse rate with increasing altitude?

Accepted Answer

2 °C per 1,000 feet.

Answer

1 °C per 1,000 feet.

Answer

3 °C per 1,000 feet.

Question 49

In a TAF, a 'TEMPO' group indicates temporary fluctuations in weather. How long do these fluctuations usually last?

Accepted Answer

Usually less than an hour, and in total less than half the time period specified.

Answer

Exactly two hours.

Answer

More than half of the entire forecast period.

Question 50

What is the most dangerous characteristic of a microburst?

Accepted Answer

A powerful downdraft that can reach up to 6,000 feet per minute, followed by severe wind shear.

Answer

Hail stones larger than 2 inches in diameter.

Answer

A sudden and dramatic drop in temperature.

Question 51

While operating a drone in a desert environment during the afternoon, a remote pilot notices small, swirling columns of dust. These are known as:

Accepted Answer

Dust devils, which indicate unstable air and localized turbulence.

Answer

Microbursts.

Answer

Squall lines.

Question 52

When flying a drone, how does high humidity specifically impact flight performance?

Accepted Answer

It decreases performance slightly because moist air is less dense than dry air.

Answer

It improves performance because water particles make the air heavier and denser.

Answer

It has absolutely no effect on aerodynamics or engine performance.

Question 53

Which weather phenomenon is always associated with a thunderstorm?

Accepted Answer

Lightning.

Answer

Hail.

Answer

Heavy rain.

Question 54

What causes the wind to blow?

Accepted Answer

Differences in atmospheric pressure.

Answer

The rotation of the Earth.

Answer

Ocean currents.

Question 55

Why is frost considered hazardous to drone operations?

Accepted Answer

It disrupts the smooth flow of air over the airfoil, decreasing lift and increasing drag.

Answer

It adds immense weight to the aircraft, dragging it down.

Answer

It shorts out the electronic speed controllers.

Question 56

Low-level turbulence can occur and icing can become hazardous in which type of fog?

Accepted Answer

Steam fog.

Answer

Upslope fog.

Answer

Rain-induced fog.

Question 57

In the METAR 'SPECI KMDW 121856Z 32005KT 1 1/2SM RA OVC007 17/16 A2980', what does 'SPECI' indicate?

Accepted Answer

A special unscheduled observation indicating a significant change in weather.

Answer

A specified terminal forecast.

Answer

A special restricted airspace notice.

Question 58

What signals the beginning of the mature stage of a thunderstorm?

Accepted Answer

Precipitation falling to the surface.

Answer

The formation of an anvil cloud top.

Answer

The cessation of lightning.

Question 59

One weather phenomenon which will always occur when flying across a front is a change in the

Accepted Answer

wind direction.

Answer

stability of the air mass.

Answer

type of precipitation.

Question 60

Which of the following describes a cold front?

Accepted Answer

A mass of cold, dense, and stable air advancing and replacing a body of warmer air.

Answer

A mass of warm air replacing a mass of cold air.

Answer

Two air masses colliding and remaining stationary.

Exam simulation Weather - FAA Part 107 Drone Exam Prep

Exam simulation FAA Part 107 Drone Exam Prep Weather 60 questions on 120 minutes