Oliver's Deck

Question 1

What are some properties of ceramics?

Answer 1

Resistance to wearing, Heat resistance, Brittle, non magnetic, corrosion resistant.

Question 2

What are some properties of Glass?

Answer 2

Transparent, Heat resistant, chemical resistance.

Question 3

What are ceramics used for?

Answer 3

Ceramics are used in things like break pads and spark plugs.

Question 4

What is laminated glass?

Answer 4

Laminated glass is glass that holds together when shattering and is used for things like car, and plane windshields. It is made by placing a layer pvb between two layers of glass.

Question 5

What is insulated glass?

Answer 5

Insulated glass prevents heat loss by using two layers of glass with an inert gas sealed betwen them.

Question 6

What is fiberglass?

Answer 6

Fiberglass is a light-weight, durable composite material

Question 7

What are the properties of fiberglass?

Answer 7

Chemical Resistance
High Heat Resistance
High Cold Resistance
Pressure Resistance
High Tensile Strength
Electrical Insulator
Low Moisture Absorbtion
Corrosion Resistant
High Compressive Strength
Lightweight

Question 8

What is fiberglass made of?

Answer 8

Fiberglass is made by melting glass into fibers. Weaving those glass fibers into a sheet, and then coating it with an adhesive or binding chemicals.

Question 9

What is fiberglass used for?

Answer 9

Fiberglass is used in the bodies of vehicles and in insulation.

Question 10

What is Corrosion?

Answer 10

Corrosion is the process in which refined metals are converted into more stable oxides which causes that metal to deteroirate.

Question 11

What different types of corrosion are there?

Answer 11

Uniform, galvanic, crevice, pitting, interangular, selective leaching, erosion-corrosion and stress corrosion.

Question 12

What is uniform corrosion?

Answer 12

Uniform or general corrosion are defined as a type of corrosion attack that is more or less distributed over the entire exposed surface of a metal. It is commonly form found in ferrous metals and alloys not protected by surface coatings and cathodic protection.

Question 13

What is galvanic corrosion?

Answer 13

Galvanic corrosion is the accelerated corrosion of a metal because of contact with a more noble metal in an electrolyte, Galvanic series of metal and alloys is used for predictions of this type of corrosion.

Question 14

What is crevice corrosion?

Answer 14

Crevice corrosion is a localized attack on a metal adjacent to a crevice between two joining surfaces (two metals or metal-nonmetal crevices). It is considered good design practice to avoid, if possible, all shapes and joints that form crevices into which oxygen does not have ready access.

Question 15

What is pitting corrosion?

Answer 15

Pitting corrosion usually happens on certain metals like aluminum alloys, stainless steel, and alloys when their protective oxide layer gets damaged and can’t heal itself. This creates small, deep holes called pits that can quickly make the metal weaker by piercing through its thickness.

Question 16

What is intergranular corrosion?

Answer 16

Intergranular corrosion is a kind of corrosion that happens along the edges between grains in a metal or alloy. These grain boundaries can weaken the material and make it more prone to damage. It occurs due to impurities or certain environmental conditions. Intergranular corrosion can cause the material to degrade and become less strong.

Question 17

What is Selective-Leaching corrosion?

Answer 17

Selective leaching corrosion, also called dezincification or dealloying, is when one element in an alloy gets eaten away more than the others. This weakens the material and makes it porous. It happens in certain conditions like acidic or alkaline environments. Selective leaching corrosion can make the alloy less strong and can cause it to break down.

Question 18

What is errosion corrosion?

Answer 18

Erosion corrosion is a type of corrosion that occurs when a metal is exposed to a combination of mechanical erosion and chemical corrosion. It happens when a metal surface is continuously exposed to a moving fluid, such as a liquid or gas, which contains corrosive agents. The fluid flow causes the removal of the protective layer on the metal surface, making it more susceptible to corrosion. The combination of mechanical erosion and chemical attack can lead to accelerated degradation of the metal, resulting in thinning, pitting, or grooving of the surface. Erosion corrosion is often observed in industries such as oil and gas, chemical processing, and marine environments where high-velocity fluid flows are present.

Question 19

What is stress corrosion?

Answer 19

Stress corrosion happens when a material cracks or corrodes because of both stress and a harmful environment. It mostly occurs in metals and alloys. Stress alone or a corrosive environment alone may not cause problems, but when they come together, the material becomes weak. This can lead to unexpected failures in structures and things like pipelines.

Question 20

What are methods of corrosion protection?

Answer 20

Barrier methods - Painting and galvanizing, which prevents the exposure to oxygen.

Sacrificial anode method - using a more aniodic material which will corrode in place of the protected material.

Note: Zinc galvanizing is both a barrier and a sacrificial anode method.

Question 21

What are different methods of electricity generation?

Answer 21

Coal - Coal is burnt which heats water which turns into steam thats truns turbines which convers the kinetic energy into electrical.

Wind - Wind spins turbines which generate electricity.

Solar - Photons hit a metal surface (Usually silicon) and the photons knock the electrons of those silicon atoms and have their energy converted into electricity.

Hydroelectric - The natural current of a body of water is altered to run over and spina turbine that generates electricity.

Nuclear fission - Radioactive elements (usually Uranium 235) have a neutron fired at them which excites an atom of the radioactive material. The atom explodes and releases energy in the form of heat, the neutrons from the atom of the radioactive material launch off and hit other atoms causing a chain reaction generating tremendous heat. This heat is used to boild water into steam which is then used to turn turbines which generates electricity.

Geothermal - pipes of water run down underground and are heated by the earths temperature which turns the water into steam, the steam travels upward which turns turbines which generate elctricity.

Question 22

What is Ohm’s law?

Answer 22

V = IR

V = Voltage
I = Current
R = Resistance

Question 23

Answer 23

A) 0.35 A

Question 24

Answer 24

C) Full Wave Retification

Question 25

Answer 25

C) 12.0 A

Question 26

Where does corrosion most commonly occur in aircrafts?

Answer 26

The Exterior and the frame.

Question 27

How is corrosion prevented in aicrafts?

Answer 27

Barrier method - The frames and exterior are given coatings such as paint to prevent exposure to oxygen.