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Basic Aerodynamics > First Oral(?) Exam > Flashcards

First Oral(?) Exam Flashcards

1
Q

1st Layer of the atmosphere, with a vertical distance of 0-10km

A

Troposphere

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2
Q

2nd layer of the atmosphere, ranging from 10-30km

A

Stratosphere

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3
Q

3rd layer of the atmosphere, ranging from 30-50km high

A

Mesosphere

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4
Q

4th layer of the atmosphere, ranging from 50-400km high

A

Thermosphere

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5
Q

5th layer of the atmosphere that extends from 400km and beyond

A

Exosphere

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6
Q

The term aerodynamics is derived from the combination of two Greek words: “____,” meaning air, and “___,” meaning
force of power.

A

-Aero
-Dyne

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7
Q

It is usually defined as the force exerted against the earth’s surface by the weight of the air above that surface.

A

Atmospheric Pressure

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8
Q

Atmospheric pressure is measured with an instrument called a __________, composed of mercury in a tube that records atmospheric pressure in inches of mercury

A

Barometer

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9
Q

A ______ is a SI metric unit that expresses force in Newtons per square meter.

A

Pascal

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10
Q

1 atm (atmosphere) is equal to how much PSI (Pounds Per Square Inch)

A

14.7 PSI

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11
Q

14.7 PSI is equal to how much Hg (inches of mercury)

A

29.92 in Hg

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12
Q

29.92 in Hg is equal to how much hPa (newtons per square meters)

A

1013.2 hPa

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13
Q

1013.2 hPa is equal to how much milliburs

A

1013.2 mb (milliburs)

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14
Q

1013.2 mb is equal to how much in millimeters of mercury

A

760mm Hg

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15
Q

Atmospheric pressure decreases with increasing _______.

A

altitude

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16
Q

Newton’s 1st Law

A

It is the law of inertia. It simply states that a body at rest does not move unless force is applied to it.

17
Q

Newton’s 2nd Law

A

It states that if a body moving with uniform speed is acted upon by an external force, the change of motion is proportional to the amount of the force, and motion takes place in the direction in which the force acts.

18
Q

Newton’s 3rd Law

A

It is the law of action and reaction. This law states that for every action (force) there is an equal and opposite reaction (force).

19
Q

The two types of Airfoil

A

Symmetrical and Asymmetrical

20
Q

Bernoulli’s principle

A

states that when a fluid (air) flowing through a tube reaches a constriction, or narrowing, of the tube, the speed of the fluid flowing through that constriction increases and its pressure decreases.

21
Q

An ______ is a surface designed to obtain lift from the air through which it moves.

A

airfoil

22
Q

The difference in pressure between the upper and lower surfaces of the wing is called ___.

A

lift

23
Q

____ ______ refers to airflow that is flowing in a consistent smooth stream.

A

Laminar airflow

24
Q

____ is the rate of motion in a particular direction in relation to time.

A

velocity

25
Q

_____ is the rate of motion in relation to time

A

Speed

26
Q

The upper boundary of the troposphere is the ____. It is characterized as a zone of
relatively constant temperature of –57 °C or –69 °F.

A

tropopause

27
Q

Heavier-than-air aircraft, deriving lift from dynamic motion through the air

A

Aerodyne

28
Q

An ______ (from Ancient Greek ἀήρ (aḗr) ‘air’ and στατός (statós) ‘standing’, via French) is a lighter-than-air aircraft that gains its lift through the use of a buoyant gas

A

aerostat

29
Q

______ means the upward movement of air just before the leading edge of the wing

A

Upwash

30
Q

A corresponding ______, downward movement of air occurs at the trailing edge.

A

Downwash

31
Q

It is the angle at which the chord of an aircraft’s wing meets the relative wind.

A

Angle of Attack/ AoA

32
Q

______ is the amount of water vapor in the air.

A

Humidity

33
Q

______ is the weight of water vapor in a unit volume of air.

A

Absolute humidity

34
Q

_____ ______ is the ratio, in
percent, of the moisture actually in the air to the moisture it would hold if it were saturated at the same temperature
and pressure.

A

Relative humidity

35
Q
A

Basic Aerodynamics (2 decks)

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