Basic Physics

Question 1

What are the three types of heat transfer?

Answer 1

Conduction, convection, radiation

Question 2

What is the atmospheric pressure on a standard day at sea level?

Answer 2

14.7 psi or 29.92 inches of mercury

Question 3

How is pressure expressed in hydraulic and pneumatic‘s?

Answer 3

PSI

Question 4

What types of matter are affected by thermal expansion?

Answer 4

Solid, liquid and gases

Question 5

Are liquids compressible?

Answer 5

No

Question 6

What is the basic Pascal’s law formula for computing force given pressure and area?

Answer 6

Force = Pressure x Area

Question 7

In what direction is pressure transmitted when force is applied to a confined fluid?

Answer 7

Equality in all directions

Question 8

What are the three states of matter?

Answer 8

Solid, liquid and gases

Question 9

What is the term used to describe the ratio of the amount of water vapor actually present in the atmosphere as compared to when the air is saturated with water vapor?

Answer 9

Relative humidity

Question 10

On a standard a temperature in degrees Fahrenheit, or Celsius

Answer 10

59°F or 15°C

Question 11

What factors determine density altitude?

Answer 11

Pressure and atmospheric temperature

Question 12

What is the approximate speed of sound on a standard day at sea level?

Answer 12

340 m/s or 661.7 kn.

Question 13

What is the definition of friction?

Answer 13

Opposition to the relative movement between two objects

Question 14

What does the basic lever machine consist of?

Answer 14

It has a rigid bar and a pivot point called the fulcrum

Question 15

How does the blade flapping help compensate for the symmetry of lift in a helicopter main rotor system?

Answer 15

Serves to increase the angle attack and lift on the retaining blade of the rotor and decrease the angle of attack and the lift on the advancing blade side

Question 16

What are the four principles forces acting on an airplane in flight?

Answer 16

Lift, drag, thrust and gravity

Question 17

What is a British thermal unit?

Answer 17

The amount of heat energy required to change the temperature of 1 pound of water, 1°F

Question 18

A wheelbarrow is an example of what class of lever?

Answer 18

A second class lever

Question 19

What is the angle between the chord line of an airfoil and the direction of the relative wind called?

Answer 19

Angle of attack

Question 20

Define matter

Answer 20

Any substance that occupies space and has mass

Question 21

Define kinetic energy

Answer 21

It is the energy of motion

Question 22

Work is a product of what two factors?

Answer 22

Force and the distance moved

Question 23

What causes an airplane wing to stall?

Answer 23

A stall is caused by the separation of the airflow across the top of the wing from the wing upper surface, when the angle of attack exceeds a critical value

Question 24

What effects do the lowering of flaps have on an airplane in flight?

Answer 24

Lift increases, drag increases and the stall speed decreases

Question 25

What functions do wing mounted vortex generators do?

Answer 25

Vortx generators serve to delay or keep the airflow from separating from the upper surface of the wings during high-speed flights

Question 26

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

Answer 26

Absolute zero

Question 27

What change occurs in the flow of air through the main rotor system of a helicopter when transitioning from normal flight to auto rotation?

Answer 27

During normal flight, the air moves downward, and during auto rotation, the air moves upward