Navedtra 14342 (Ac) Assignment 1

Front 1

The atmosphere of the earth is comprised of how many basic layers?

Back 1

1. Five

Front 2

The troposphere is the atmospheric layer of the earth's atmosphere that extends upward from the earth's surface to approximately what height?

Back 2

1. 7 miles

Front 3

In what layer of the atmosphere does most weather occur?

Back 3

2. Troposphere

Front 4

The stratosphere extends upward from the tropopause to approximately what height above earth's surface?

Back 4

3. 30 miles

Front 5

A barometric pressure of 28.94 inches is the same as a barometric pressure of how many millibars?

Back 5

4. 980 millibars

Front 6

A barometric pressure of 30.12 inches is the same as how many millibars of barometric pressure?

Back 6

1. 1,020 millibars

Front 7

The standard sae-level pressure is how many inches of mercury?

Back 7

2. 29.92

Front 8

When an aircraft flies from a high-temperature area to a low-temperature area, its altimiter reading will have what relationshipwith the actual altitude?

Back 8

1. Too high

Front 9

If an altimeter is not adjusted, a pressure change of 1 inch of mercury will result in an altimeter error of how many feet?

Back 9

3. 1,000 ft

Front 10

A low-pressure weather area is the same as what type of weather system?

Back 10

1. Cyclonic

Front 11

What are the characteristics of a cyclone in the Northern Hemisphere?

Back 11

1. A low-pressure area with winds that circulate in a counterclockwise direction.

Front 12

In the Northern Hemisphere, the wind around a high-pressure area flows in what direction?

Back 12

3. Clockwise

Front 13

Compared to weather conditions associated with low-pressure weather systems, which of the following are weather conditions associated with high-pressure weather that make for favorable flying conditions?systems

Back 13

1. Fewer clouds and less visibility; 2. Less areas of concentrated turbulence; 3. Less winds; 4. Each of the above

Front 14

For a cloud to be composed almos entirely with ice crystals, the temperature of the surrounding air must be below what specific temperature?

Back 14

1. 5°F

Front 15

What type of cloud has bases that are nearly horizontal and have dome-shaped upper surfaces?

Back 15

2. Cumulus

Front 16

The term "mackerel sky" is associated with what type of cloud?

Back 16

2. Cirrocumulus

Front 17

A thick, gray or blue-gray, smooth overcast appearance shows what type of cloud?

Back 17

3. Altostratus

Front 18

What type of cloud is always accompanied by precipitation?

Back 18

4. Nimnbostratus

Front 19

A flat, shapeless, and dull gray layer is a characteristic of what type of cloud?

Back 19

1. Stratus

Front 20

Which of the following types of clouds have great verticle developments that resemble mountains or towers?

Back 20

3. Cumulonimbus

Front 21

Which of the following cloud formations may have tops that extend above an altitude of 60,000 feet?

Back 21

2. Cumulonimbus

Front 22

Of the following types of cloud formations, which one is normally located between an altitude of 6,500 and 23,000feet?

Back 22

4. Altostratus

Front 23

When air stagnates over certain areas, it acquires the properties from what region?

Back 23

2. The air mass region

Front 24

When two air masses meet, what weather term refers to the boundary that separates the masses?

Back 24

4. Front

Front 25

Fronts are generally classified according to the relative motions of what weather phenomonon?

Back 25

3. Air masses

Front 26

What weather phenomenon occurs when a region that is occupied by warm air is invaded by a cold air mass?

Back 26

3. The cold air pushes the warm air upward.

Front 27

Which of the following weater characteristics is NOT associated with the passage of a coold front?

Back 27

1. Decreasing pressure

Front 28

Squall lines are associated with what type of front?

Back 28

3. A fast-moving cold front

Front 29

What is normally the average speed of a warm front?

Back 29

2. 10 knots

Front 30

What type of front usually causes extended periods of poor flying weather?

Back 30

1. Stationary

Front 31

What type if front is formed when a surface cold front overtakes a warm front?

Back 31

1. Occluded

Front 32

An occluded front occurs as a result of what action?

Back 32

4. A cold front overtaking a warm front

Front 33

What are the two types of occluded weather fronts?

Back 33

4. Warm and cold

Front 34

A cloud on the earth's surface is called fog. This fog is composed of what form or forms of water?

Back 34

2. Minute, suspended, and visible droplets or ice particles

Front 35

The temperature to which air under constant pressure with a constant water vapor content must be cooled to become saturated is known as the

Back 35

2. dew point

Front 36

The basis for the prediction of fog is provided by the differential between the

Back 36

4. Dew point and temperature

Front 37

Fog seldom forms when the dew-point spread is greater than how many degrees?

Back 37

4. 4°F

Front 38

Fog is divided into how many classes?

Back 38

2. Two

Front 39

Which of the following combinations of meteorological conditions is most likely to produce a deep and dense fog?

Back 39

2. A light wind with dust-laden air

Front 40

When there is sufficient humidity, which of the following environments is most favoarble for the formation of radiation fog?

Back 40

1. A clear sky at night

Front 41

What type of fog is formed when an air mass passes over a cooler surface?

Back 41

3. Advection

Front 42

What type of fog is most commonly known as ground fog?

Back 42

4. Radiation

Front 43

What type of fog forms when air is pushed up a gradual slope?

Back 43

4. Upslope fog

Front 44

Under what conditions does steam fog occur?

Back 44

1. Cold air passes over the surface of a warm water body and becomes saturated with water that evaporates from the body

Front 45

Warm-front fog forms as a result of what phenomenon?

Back 45

3. Rain falling from warm air into cold air

Front 46

What type of precipitationis normally the most effective at reducing visibility?

Back 46

1. Snow

Front 47

What type if icing results when a film of liquid water freezes from the inside out forming a transparent, dense, strong layer of ice on aircraft surfaces?

Back 47

3. Clear ice

Front 48

Icing conditions encoiuntered in flight result from a combination of what two types of icing?

Back 48

3. Clear and rime

Front 49

Icing that is not generally hazardous to aircraft is known as what type of icing?

Back 49

4. Trace

Front 50

Rime ice forms under what conditions?

Back 50

3. Supercooled droplets of water strike an airfoil and freeze completely before another droplet starts in the same place

Front 51

Which of the following icing conditions normally forms on aircraft on the ground?

Back 51

3. Frost

Front 52

A high performance aircraft is flying rapidly from a region whose temperature is well below freezong to another region where the temperature is considerably higher and the air is very moist. What type of aircraft icing will be caused?

Back 52

1. Frost

Front 53

Vaporized fuel thet is combined with expanding air causes aircraft engine failure when what type of icing occurs?

Back 53

2. Carburetor icing

Front 54

Icing requires immediate flight diversion when the icing is of what classification?

Back 54

3. Severe

Front 55

Air near the surface of the earth flowing over an obstruction causes what type of turbulence?

Back 55

4. Mechanical

Front 56

What type of turbulence is caused by cold air moving over warmer ground?

Back 56

1. Thermal

Front 57

What type of natural disturbance is defined as a severe change in either wind speed or wind direction?

Back 57

4. Wind shear

Front 58

The term 'chop' refers to a type of turbulence that has what affect on an aircraft?

Back 58

4. A rhythmic bumpiness to the aircraft with little altitude change

Front 59

What type of turbulence causes abrupt changes in attitude and altitude?

Back 59

3. Severe

Front 60

The intensities of turbulence are based on what factor or factors?

Back 60

1. Type of aircraft and aircraft reaction

Front 61

A pilot has given you a report relating to in-flight turbulence. The pilot has included altitude, position, time turbulence noted, and intensity of turbulence. What other information must you obtain from the pilot with reference to the report?

Back 61

1. Type of aircraft involved

Front 62

What type of frozen precipitation is associated with thunderstorm activity?

Back 62

2.Hail

Front 63

The three distinct stages of a thunderstorm in its life cycle are

Back 63

3. cumulus. mature, and dissipating

Front 64

At what stage in the life cycle of a thunderstorm do surface rains begin to fall?

Back 64

3. Mature

Front 65

During the cumulus stage of a thunderstorm, updrafts can reach a speed of up to what maximum number of feet per second?

Back 65

2. 100 ft/sec

Front 66

A thunderstorm is approaching your area. You notice that the cloud has formed into an anvil shape. What does this shape indicate?

Back 66

2. The cell is starting to dissipate

Front 67

During the mature stage of a thunderstorm, the peak average cell acan attain heights at or above what minimum altitude?

Back 67

4. 25,000 ft

Front 68

Severe of extreme turbulence is most often found in what part of a thunderstorm?

Back 68

2.Anvil cloud

Front 69

Lightning is a hazard of a thunderdstorm that may strike the ground up to how many miles away from the cloud?

Back 69

2. 12 miles

Front 70

The downdrafts of a thunderstorm are initiated by what cause?

Back 70

1. Frictional drag of rainfall

Front 71

Downdrafts are significant in what stages of a thunderstorm?

Back 71

4. Mature and anvil

Front 72

Hail can be encountered up to what maximum distance ahead of a thumderstorm?

Back 72

3. 25 miles

Front 73

The strong surface winds associated with a thunderstorm are caused by which of the following actions?

Back 73

4. Horizontal spreading of downdraft currents approaching earth's surface