General #2

Question 1

Define Pi

Answer 1

A constant that expresses the relationship between the circumference of a circle and it’s diameter
=3.1416

Question 2

Define matter

Answer 2

Any substance that occupies space and has mass

Question 3

Matter may exist in what three states?

Answer 3

Solid
Liquid
Gas

Question 4

Define kinetic energy

Answer 4

Energy in motion

Question 5

Work is the product of what two factors?

Answer 5

Force and the distance moved
W = F x D

Question 6

What is British Thermal Unit

Answer 6

Heat energy required to change the temperature of 1 pound of water 1 degree Fahrenheit

Question 7

Three methods of heat transfer

Answer 7

Conduction
Convection
Radiation

Question 8

What term defines the temperature at which all molecular motion ceases?

Answer 8

Absolute zero

Question 9

Units to express hydraulic or pneumatic pressure in the United States

Answer 9

PSI, (Pounds per square inch)

Question 10

Describe how pressure is transmitted when a force is applied to a confined liquid

Answer 10

Pressure is transmitted equally in all directions

Question 11

Approximate speed of sound at sea level on a standard day?

Answer 11

661 knots or 340 meters per second

Question 12

Atmospheric pressure at sea level on a standard day?

Answer 12

29.92 inches of mercury

Question 13

Temperature on a standard day

Answer 13

59 degrees in Fahrenheit
15 degrees in Celsius

Question 14

Relative humidity

Answer 14

The ratio between the amount of moisture present in the atmosphere as compared to the amount the air could hold if it were completely saturated

Question 15

Four principle forces acting on an airplane in flight

Answer 15

Drag
Lift
Thrust
Gravity

Question 16

Angle of attack

Answer 16

The angle between the relative wind and the chord line of an airfoil

Question 17

What are the factors that cause an airplane wing to stall?

Answer 17

When the angle of attack exceeds a critical value and the airflow separates from the upper surface and becomes turbulent

Question 18

Principle effects that result from lowering the flaps while in flight

Answer 18

Lift increases, drag increases, and stall speed decreases

Question 19

What is the function of a wing mounted vortex generator?

Answer 19

Delay or keep the airflow from separating from the upper surface of a wing during high speed flight

Enhance aerodynamic performance by manipulating airflow patterns

Question 20

How does blade-flapping help to compensate for dissymmetry of lift in helicopter main rotor systems?

Answer 20

Flapping increases the angle of attack and lift on the retreating blade and decreases the angle of attack and lift on the advancing blade

Question 21

How does the airflow through the main rotor of a helicopter change during the transition from normal flight to autorotation?

Answer 21

During normal flight the air moves downward and during autorotation the air moves upward

Question 22

What elements are required to form an electrical circuit?

Answer 22

• A source of electrical energy
• A load or resistance to use the electricity
• Wires or conductors to connect the source to the load

Question 23

DC circuits can take one of three forms or types. What are they?

Answer 23

• Series
• Parallel
• Complex (series-parallel)

Question 24

Absolute humidity

Answer 24

The ratio of the amount of water vapor in a mixture of air and water

Question 25

Dewpoint

Answer 25

Temperature to which the air must be cooled to become saturated

Question 26

Purpose of wing dihedral

Answer 26

Increase lateral stability