Term
| What are three states of matter? |
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Definition
| Solids, liquids and gases |
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Term
| What is the approximate speed of sound on a standard day at sea level? |
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Definition
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Term
| What types of matter are affected by thermal expansion? |
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Definition
| Solids, liquids and gases |
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Term
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Definition
| Any substance that occupies space and has weight |
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Term
| Are liquids compressible? |
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Definition
| Liquids are usually considered to be incompressible |
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Term
| What is the basic formula for computing force, given pressure and area? |
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Definition
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Term
| How is pressure expressed in hydraulics and pneumatics? |
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Definition
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Term
| What type of lever is a wheelbarrow? |
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Definition
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Term
| What is standard day temperature in degrees Fahrenheit? |
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Definition
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Term
| What factors determine density altitude? |
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Definition
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Term
| What is the term used to describe the ratio of the amount of water vapor actually present in the atmosphere as compared when the air is saturated with water vapor? |
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Definition
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Term
| What direction is pressure transmitted when force is applied to a confined fluid? |
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Definition
| Equally in all directions |
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Term
| What are the three basic parts of all levers? |
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Definition
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Term
| What are two factors involved in work? |
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Definition
| Force and movement through a distance |
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Term
| What is the definition of friction? |
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Definition
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Term
| What are three methods of heat transfer? |
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Definition
| Conduction, convection and radiation |
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Term
| What is the condition called when the heat energy of a given gas sample is reduced until motion of the molecules would cease entirely? |
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Definition
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Term
| What is the atmospheric pressure on a standard day at sea level? |
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Definition
14.7 PSI, 29.92 inches of mercury and 1013.2 millibars |
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Term
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Definition
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Term
| What is a British Thermal Unit? |
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Definition
| The amount of heat required to change the temperature of one pound of water one degree Fahrenheit |
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Term
| What does a basic lever machine consist of? |
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Definition
| A rigid bar, free to pivot on or rotate about a point called the fulcrum |
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Term
| What are the four principal forces acting on an airplane in flight? |
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Definition
| Lift, weight, thrust and drag |
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Term
| What is the angle between the chord line of an airfoil and the direction of the relative wind called? |
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Definition
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Term
| What causes an airplane wing to stall? |
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Definition
| The separation of airflow across the top of the wing from the wings upper surface |
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Term
| What effects do the lowering of flaps have on an airplane in flight? |
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Definition
Increased lift and drag
Decreased stall speed |
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Term
| What change occurs in the flow of air through the main rotor system of a helicopter when transitioning from normal powered flight to auto rotation? |
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Definition
| It is reversed. In normal powered flight, air is drawn into the main rotor system from above and exhausted downward. During auto rotation, airflow enters the rotor system from below as the helicopter descends |
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Term
| How does blade flapping help compensate for dissymmetry of lift in helicopter main rotor systems? |
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Definition
| It serves to increase the angle of attack and lift on the retreating blade side of the rotor and decrease the angle of attack and lift on the advancing blade side |
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