SWE gouge Flashcards
firefighting and rescue manual
00-80R-14
• Class A Fires
wood and wood products, extinguished with water
• Class B Fires
gasoline, jet fuels, oil, and other flammable/combustible liquids, extinguished with AFFF, clean agent, and PKP
• Class C Fires
energized electrical equipment, extinguish with PKP
• Class D Fires
combustible metals, extinguished with water in large quantities
• JP-4
NATO F-40, flash point –10 °F to 30 °F
• JP-5 Flash Point
NATO F-44 flashpoint of 140 °F
• JP-8/ Flash Point
NATO F-34, flash point of 100 °F
• primary flight line extinguishers
halogenated clean agent wheeled units
• airfield extinguishers inspections done IAW
NFPA Standard 10 inspection
• How often are Nitrogen cylinders hydrostatically tested
every 5 years
cleaning and corrosion control manual
• 1-1-691
Definition of corrosion
• Corrosion is the electrochemical deterioration of a metal because of its chemical reaction with the surrounding environment
What is the most common type of corrosion
electrochemical corrosion
What are the four conditions must exist before corrosion can occur
Anode, Cathode, Electrolyte, Electrical Contact
Is the anode or cathode the corroding metal
the corroding metal is known as the anode
Uniform Surface Corrosion
direct chemical attack on a metal surface and involves only the metal surface, first seen as a general dulling or etching of a polished surface
Galvanic Corrosion
different metals in contact with each other and an electrolyte
How does Pitting Corrosion appear
first noticeable as a white or gray powdery deposit
Exfoliation Corrosion
advanced form of intergranular corrosion where the surface grains of a metal are lifted up by the force of expanding corrosion products occurring at the grain boundaries
Stress Corrosion Cracking
intergranular or transgranular cracking of a metal caused by the combined effects of constant tensile stress
Does carbon corrode easily
• Carbon is cathodic and has low corrosion potential
Fretting Corrosion
special form of concentration cell corrosion which occurs in combination with surface wear
What does corrosion on magnesium look like
appears as white, powdery mounds or spots
What flaws can you see with penetrant inspection
flaw being inspected for is open to the surface
What can eddy current inspection detect
can detect and evaluate pitting, intergranular, exfoliation, stress cracking, and corrosion fatigue cracking
What can be seen with ultrasonic inspection
may be used to detect exfoliation, intergranular, pitting, corrosion, and stress corrosion and corrosion fatigue cracking
what is the depth of light corrosion
.001inch maximum can normally be removed by light hand sanding