General: Basic Physics 🔊

Question 1

What is matter?

Answer 1

Anything that occupies space or has mass

Question 2

What are the different states of matter?

Answer 2

Solid, liquid, gas, plasma

Question 3

What are two types of fluid?

Answer 3

Liquids and gasses

Question 4

When a fluid passes through the middle section of a venturi, what pressure and velocity changes occur?

Answer 4

Pressure drops and velocity increases

Question 5

Are liquids compressible?

Answer 5

No

Question 6

What is the standard atmospheric pressure at sea level?

Answer 6

29.92 inches of Hg

Question 7

What is the standard day temperature?

Answer 7

59° F

Question 8

What is the name of the atmospheric phenomenon where cool air is trapped near the earth by warm air?

Answer 8

Temperature inversion

Question 9

What is the speed of sound through the air under standard sea level conditions?

Answer 9

662 knots

Question 10

What is meant by the density of air?

Answer 10

Mass of a given volume of air

Question 11

What determines the density of air? (density altitude)

Answer 11

Temperature and pressure acting on it

Question 12

What does specific gravity mean?

Answer 12

The ratio of a substance’s density to the density of pure water

Question 13

What are the three basic parts of a lever?

Answer 13

Fulcrum, force of effort, and resistance

Question 14

What is a first-class lever and give an example?

Answer 14

When the fulcrum is located between the effort and the resistance, a seesaw

Question 15

In what direction is force transmitted to a confined liquid?

Answer 15

Equally in all directions

Question 16

What is the formula for computing force, pressure, and area? (Pascal’s law)

Answer 16

Force= pressure x area (F=PxA)

Question 17

What is kinetic energy?

Answer 17

Energy in an object created from its movement

Question 18

What is potential energy?

Answer 18

Energy that’s stored and can be turned into kinetic energy

Question 19

What is absolute zero?

Answer 19

Temperature at which all motion of atoms will cease entirely in a given sample of gas (-273°C)

Question 20

What are the two factors involved in work?

Answer 20

Force and movement through a measurable distance

Question 21

How is pressure expressed in hydraulics and pneumatics?

Answer 21

Pounds per square inch

Question 22

Name the forms of energy that can be converted into heat energy.

Answer 22

Mechanical, electrical, chemical, radiant, nuclear, or solar

Question 23

What are the three methods of heat transfer?

Answer 23

Conduction, convection, and radiation

Question 24

What are three types of friction?

Answer 24

Rolling, sliding, and static

Question 25

What are the four forces experienced by an aircraft in flight?

Answer 25

Gravity, thrust, lift, and drag

Question 26

What is an autorotation?

Answer 26

When a helicopter’s rotor blades spin without engine power as air flows through the rotor

Question 27

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

Answer 27

Increases the angle of attack on the retreating blade and decreases the angle of attack on the advancing blade

Question 28

What is the name of the imaginary line that runs from the leading edge to the trailing edge of an airfoil?

Answer 28

Chord line

Question 29

What function do wing mounted vortex generators serve?

Answer 29

They prevent airflow separation from the upper surface of the wing

Question 30

What is directional stability?

Answer 30

The ability of an aircraft to avoid yawing

Question 31

What is magnetism?

Answer 31

Motion of electric charge, attracts and repulses forces between objects