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What is the primary role of mathematics in science and technology?
What is the primary role of mathematics in science and technology?
What is a characteristic of the language of mathematics?
What is a characteristic of the language of mathematics?
Why do scientists and engineers rely heavily on mathematics?
Why do scientists and engineers rely heavily on mathematics?
What is a benefit of using mathematics in science and technology?
What is a benefit of using mathematics in science and technology?
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What is the relationship between mathematics and the natural world?
What is the relationship between mathematics and the natural world?
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What is the decimal equivalent of the binary number 1000001?
What is the decimal equivalent of the binary number 1000001?
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What is the value of x in the equation x = (12+6) + (2) 2 + 9(14) √16?
What is the value of x in the equation x = (12+6) + (2) 2 + 9(14) √16?
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If an engine has a 16:7 propeller gear ratio, what is the RPM of the propeller when the engine is turning at 2,400 RPM?
If an engine has a 16:7 propeller gear ratio, what is the RPM of the propeller when the engine is turning at 2,400 RPM?
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What is the correct order of operations in an algebraic expression?
What is the correct order of operations in an algebraic expression?
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What is the value of side a in the right triangle with Angle A = 25°, Side C (hypotenuse) = 16 inches, and Side a = ?
What is the value of side a in the right triangle with Angle A = 25°, Side C (hypotenuse) = 16 inches, and Side a = ?
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What is the decimal equivalent of the binary number 1100011?
What is the decimal equivalent of the binary number 1100011?
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What is the decimal equivalent of the binary number 1101110?
What is the decimal equivalent of the binary number 1101110?
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What is the correct order of operations when evaluating an algebraic expression?
What is the correct order of operations when evaluating an algebraic expression?
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What is the value of x in the equation x = (12+6) + (2) 2 + 9(14) √16?
What is the value of x in the equation x = (12+6) + (2) 2 + 9(14) √16?
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What is the circumference of a circle with a radius of 7 inches?
What is the circumference of a circle with a radius of 7 inches?
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If a shape has a circumference of 7 inches, what is its diameter?
If a shape has a circumference of 7 inches, what is its diameter?
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In the right triangle with Angle A = 25°, Side C (hypotenuse) = 16 inches, what is the length of side a?
In the right triangle with Angle A = 25°, Side C (hypotenuse) = 16 inches, what is the length of side a?
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What type of corrosion is indicated by rivet 'smoking'?
What type of corrosion is indicated by rivet 'smoking'?
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Which type of corrosion is usually caused by an improperly cured wash primer?
Which type of corrosion is usually caused by an improperly cured wash primer?
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Which metal is particularly vulnerable to corrosive attack from salt solutions?
Which metal is particularly vulnerable to corrosive attack from salt solutions?
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What is required for corrosion to occur in a material?
What is required for corrosion to occur in a material?
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What is the purpose of the aluminum oxide film on the surface of aluminum alloys?
What is the purpose of the aluminum oxide film on the surface of aluminum alloys?
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In an electrochemical reaction, which part will be eaten away?
In an electrochemical reaction, which part will be eaten away?
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What is the basic unit of a chemical element?
What is the basic unit of a chemical element?
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What type of corrosion occurs along the grain boundaries within an aluminum alloy?
What type of corrosion occurs along the grain boundaries within an aluminum alloy?
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What is the role of the cathode in an electrochemical reaction?
What is the role of the cathode in an electrochemical reaction?
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What is the general classification of corrosion that involves the reaction between a metal and its environment?
What is the general classification of corrosion that involves the reaction between a metal and its environment?
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What is the charge carried by a neutron?
What is the charge carried by a neutron?
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What is necessary for the formation of fretting corrosion?
What is necessary for the formation of fretting corrosion?
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What process is used to help prevent stress corrosion in aluminum alloys?
What process is used to help prevent stress corrosion in aluminum alloys?
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What can cause intergranular corrosion of aluminum alloys?
What can cause intergranular corrosion of aluminum alloys?
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What type of stress can cause corrosion in the presence of a corrosive environment?
What type of stress can cause corrosion in the presence of a corrosive environment?
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What is an atom with more electrons than protons called?
What is an atom with more electrons than protons called?
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What is the mixture of varsol and kerosene used to remove?
What is the mixture of varsol and kerosene used to remove?
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What type of embrittlement can result from the use of non-recommended cleaning compounds?
What type of embrittlement can result from the use of non-recommended cleaning compounds?
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What are the two most common types of naphtha?
What are the two most common types of naphtha?
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What type of corrosion occurs when a metal is exposed to oxygen?
What type of corrosion occurs when a metal is exposed to oxygen?
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Where does metallic ion concentration cell corrosion typically form?
Where does metallic ion concentration cell corrosion typically form?
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What type of corrosion occurs when two dissimilar metals are joined?
What type of corrosion occurs when two dissimilar metals are joined?
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Study Notes
Corrosion Control
Types of Corrosion
- Rivet "smoking" is an indication of fretting corrosion.
- Filiform corrosion is usually caused by an improperly cured wash primer.
- Magnesium is particularly vulnerable to corrosive attack from salt solutions.
- Intergranular corrosion forms along the grain boundaries within an aluminum alloy.
- Galvanic corrosion occurs when two dissimilar metals are joined in a structure.
Corrosion Formation Requirements
- Presence of a metal that will corrode (anode).
- Presence of a dissimilar conductive metal (cathode) with less tendency to corrode.
- Presence of a conductive liquid electrolyte.
- Electrical contact between the anode and cathode (usually metal to metal contact).
Electrochemical Reactions
- In an electrochemical reaction, the anode is eaten away.
- The basic unit of a chemical element is the atom, made up of a nucleus containing protons and neutrons, surrounded by spinning electrons.
- Protons carry a positive electrical charge, neutrons carry no charge, and electrons carry a negative electrical charge.
Corrosion Prevention and Treatment
- Aluminum alloys are protected from oxidation by the formation of an aluminum oxide film on its surface.
- Delaying surface quenching during heat treatment can cause intergranular corrosion of aluminum alloys.
- Shot-peen metal treatment is used to help prevent stress corrosion.
- Stress corrosion may occur when the metal is subjected to tensile stress in the presence of a corrosive environment.
Cleaning and Chemicals
- Stubborn exhaust stains may be removed with a 1:2 mixture of varsol and kerosene.
- Use of non-recommended cleaning compounds can result in hydrogen embrittlement.
- Aliphatic and aromatic are the two most common types of naphtha.
Corrosion Types and Characteristics
- Oxidation corrosion forms when a metal like aluminum is exposed to a containing oxygen.
- Metallic ion concentration cell corrosion forms in open areas.
- Filiform corrosion is usually caused by an improperly cured wash primer.
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Description
Discover the basics of mathematics, the language of science and technology. Learn how math follows definite rules and is used as a tool by scientists and engineers.
