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Total 454 questions
_________ corrosion rates are found in a gas oil desulfurizers and hydrocrackers than naphtha desulfurizers and hydrocrackers by a factor of almost 2.
Answer : B
Convert these temperatures – 156º C and 450º F
Answer : C
300 Series SS is susceptible to LME when it comes in contact with molten ________.
Answer : C
In fired heater tubes, dissimilar weld metal cracking forms primarily on the _______ of the material.
Answer : A
A form of mechanical fatigue in which cracks are produced as a result of dynamic loadings is _______.
Answer : B
The creep threshold temperature for 1 ¼, 2 ¼, 5 and 9 Cr is ________.
Answer : C
Thermal fatigue damage is in the form of cracking that may occur anywhere in a metallic component where relative movement is constrained, particularly under repeated
__________.
Answer : B
With sour water corrosion, at a given pressure, the HS concentration in the sour water
_________ as temperatures ________.
Answer : D
Mitigation of CUI is best achieved by _________.
Answer : C
Carburization can be confirmed by a substantial increase in hardness and a _______ in ductility.
Answer : A
The best method to inspect for SCC is ____.
Answer : A
Which of the following materials are subject to mechanical fatigue?
Answer : D
____________ is a form of environmental cracking that can initiate on the surface of high strength low alloy steels and carbon steels with highly localized zones of high hardness in the weld metal and HAZ as a result of exposure to aqueous HF acid service.
Answer : B
Hydrogen stress cracking is the same mechanism that is responsible for sulfide stress corrosion cracking in wet HS environments except that HF acid is generating the
__________.
Answer : C