Hydraulics W-1A

Question 1

Hydraulics Definition

Answer 1

Study of forces & motions that are encountered in liquid (ex. oils, water)

Question 2

Hydraulics Application

Answer 2

Flight controls, landing gears, brakes, thrust, reverser systems, cargo doors,

Question 3

Hydraulics Advantages

Answer 3

light, low mtce, high efficiency (low friction), reliable

Question 4

Fluid definition

Answer 4

Substance that flows or conforms to the outline of a container

Question 5

Liquids expand when

Answer 5

Heated

Question 6

Liquids contract when

Answer 6

Cooled

Question 7

Liquid heated in a confined container

Answer 7

Pressure on walls increases

Question 8

Liquid cooled in a confined container

Answer 8

Pressure on walls decreases

Question 9

Are gases compressible?

Answer 9

Gases are compressible

Question 10

Are liquids compressible

Answer 10

Liquids are not

Question 11

Law of Conservation of Energy

Answer 11

Energy cannot be created or destroyed, only transformed one form to another

(Sum of kinetic, potential, and thermal energy in a closed system remains the same)

Question 12

Hydrostatic Paradox (Pascal’s 2nd Law)

Answer 12

Open container, pressure exterted by a column of the liquid is dependent on its height, and independent of its volume

Question 13

Hydrostatic Paradox (Stevin-Pascal Law)

Answer 13

Shape & size of the container holding the liquid = pressure does not affect, only the height of the liquid (because of gravity)

Question 14

Mechanical Advantage

Question 15

Bernoulli’s Principle (Pressure v. Velocity)

Answer 15

Pressure and Velocity - Inversely proportional
(speed increases, pressure decreases)