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MATSE 259 EXAM 3 Correct Answers
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MATSE 259 EXAM 3 Correct Answers
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Solution 2024/2025Pepper
MATSE 259 EXAM 3 Correct Answers
Which of the following is the softest phase? ANS✔✔ Spheroidite
Metals that lose electrons during corrosion are undergoing... ANS✔✔ Oxidation
Which material is considered corrosion resistant or already corroded? ANS✔✔ Ceramics
Which annealing process is NOT specific to ferrous alloys? ANS✔✔ Process Annealing
Which element forms the lightest weight materials of the engineering alloys? ANS✔✔ Magnesium
Which is the strongest equilibrium phase? ANS✔✔ Bainite
Which annealing process is heated above the austenitic temperature, before being oven cooled? ANS✔✔ Normalizing
Which is the strongest of the 3 main types of steel? ANS✔✔ High carbon
Martensite is a 2-phase material. (True/False) ANS✔✔ False
The Galvanic Series ranks the relative reactivity of metals based on voltage from a standard half-cell battery. (True/False)
ANS✔✔ False
Process annealing does not get rid of cold worked grains in the material. (True/False) ANS✔✔ False
When pearlite or bainite is heated to just below eutectoid temperature and held for 24 hours, spheroidite is formed.
(True/False) ANS✔✔ True
, Solution 2024/2025
Pepper
Uniform attack is thought to be caused by the same mechanism that causes crevice corrosion. (True/False) ANS✔✔
False
Most cast iron materials contain graphite in addition to cementite and ferrite. (True/False) ANS✔✔ True
Corrosion which causes one element in an alloy to be preferentially removed is referred to as selective leaching.
(True/False) ANS✔✔ True
Which of the following is a metastable phase? ANS✔✔ Martensite
If a precipitation hardened material is left in the oven for too long, what could occur? ANS✔✔ Overaging
Which alloys are known for their low density/high melting point ration? ANS✔✔ Titanium
Which annealing process generally requires the hottest temperatures, before being air cooled? ANS✔✔ Normalizing
Which is the weakest of the 3 main types of steel? ANS✔✔ low-carbon steel
Ductility and toughness of martensite can be enhanced by tempering. (True/False) ANS✔✔ True
The Electromotive Force Series (EMF) ranks the relative reactivity of metals in seawater. (True/False) ANS✔✔ False
The process annealing and stress relief processes do not provide a phase transformation in the material. (True/False)
ANS✔✔ True
Overall cast irons tend to be brittle in nature. (True/False) ANS✔✔ True
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