Question No:-26

_________ is a change in the microstructure of certain carbon steels and 0.5Mo steels after long-term operation in the 800º F to 1100º F range that may cause a loss in strength, ductility and/or creep resistance.   1. Embrittlement   2. Carburization   3. Graphitization   4. Sensitization  View Answer Answer:-3. Graphitization

Question No:-27

__________ is usually found in aqueous environments or services where water is sometimes or always present, especially where stagnant or low-flow conditions allow the growth of microorganisms.   1. MIC   2. HIC   3. SOHIC   4. None of the above  View Answer Answer:-1. MIC

Question No:-28

With chloride stress corrosion cracking, __________ temperatures ________ the susceptibility for cracking.   1. Decreasing, Increases   2. Increasing, Increases   3. Increasing, Decreases   4. Decreasing, Eliminates  View Answer Answer:-2. Increasing, Increases

Question No:-29

__________ is a form of cracking that results when certain molten metals come in contact with specific alloys. Cracking can be very sudden and brittle in nature.   1. SCC   2. LME   3. AET   4. SOHIC  View Answer Answer:-2. LME

Question No:-30

Amine cracking has been reported down to ambient temperatures with some amines. __________ temperatures and stress levels _______ the likelihood and severity of cracking.   1. Increasing increases   2. Increasing, decreases   3. Decreasing increases   4. Increasing, reduces  View Answer Answer:-1. Increasing increases