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- Question 1 of 16
Which one of the following minerals is a source of titanium?CorrectIncorrect
- Question 2 of 16
A steel rod was subjected to a fluctuating stress cycle that varied between a maximum of 400 MPa in tension to a minimum of 300 MPa in compression. What is the stress amplitude, in MPa?CorrectIncorrect
- Question 3 of 16
Which one of the following can avoid weld decay of austenitic stainless steels?CorrectIncorrect
- Question 4 of 16
Identify the INCORRECT statement with respect to grain growth.CorrectIncorrect
- Question 5 of 16
Identify the type of the following invariant reaction:
liquid 1 + solid 1 ⇌ solid 2CorrectIncorrect
- Question 6 of 16
What is the median value of the following set of numbers? ________
1, 3, 5, 9, 6, 4, 8.CorrectIncorrect
- Question 7 of 16
Which one of the following welding processes uses a non-consumable electrode?CorrectIncorrect
- Question 8 of 16
Which one of the following processes is performed for inclusion modification in ladle metallurgy of steelmaking?CorrectIncorrect
- Question 9 of 16
Which one of the following signals from a specimen is used in a scanning electron microscope to get quantitative elemental analysis?CorrectIncorrect
- Question 10 of 16
A metal powder with an apparent density of 2.5 g/cm3 was compacted in a cylindrical die to a green density of 5.5 g/cm3. If the height of the green sample was 12 mm, then the fill height of powder (in mm) would have been _______(read cm3 as cm cube)CorrectIncorrect
- Question 11 of 16
A tensile specimen was deformed to a true strain of 0.405. The change in the gauge length was 5 mm. The final gauge length of the specimen, in mm, isCorrectIncorrect
- Question 12 of 16
Two Cu-Ni alloys, one with 47 wt.% Ni and the other with 53 wt.% Ni, are kept in separate crucibles and are allowed to equilibrate at the same temperature T1 between the liquidus and the solidus. The two alloys haveCorrectIncorrect
- Question 13 of 16
Match the types of corrosion in Group I with their examples in Group II.
Group I Group II
P. Galvanic corrosion 1. Season cracking in brass
Q. Filiform corrosion 2. Nut-bolt assembly with gasket
R. Stress corrosion cracking 3. Brass fittings joined with lead-tin solder
S. Crevice corrosion 4. Painted food canCorrectIncorrect
- Question 14 of 16
An electrolytic refining cell for copper consists of an alloy with activity of copper aCu = 0.8 as the anode, and pure copper as the cathode. What is the absolute value of the cell potential (in millivolts) at 25°C, given that copper is divalent? Faraday constant is 96500 C/mol and the universal gas constant is 8.314 J/(mol.K)CorrectIncorrect
- Question 15 of 16
Match the alloy names listed in Group I with the main elements present in them listed in Group II.
Group I Group II
P. Babbit 1. Fe-Ni
Q. Muntz metal 2. Ni-Cr-Fe
R. Invar 3. Cu-Zn
S. Inconel 4. Sn-Sb-CuCorrectIncorrect
- Question 16 of 16
Assume that Sievert’s law holds for solubility of hydrogen dissolved in a thin metal foil. If the partial pressure of hydrogen in contact with the foil is increased by a factor of 4, the solubility increases by a factor ofCorrectIncorrect