IMSE 250 EXAM 1 QUESTIONS ANSWERED CORRECTLY LATEST UPDATE 2026

IMSE 250 EXAM 1 QUESTIONS ANSWERED CORRECTLY LATEST UPDATE 2026 Cr, W, and V are commonly used metal elements added to steels to product cutting tools. They all have __________ crystal structure. A.) body-centered cubic B.) face-centered cubic - Answers A Please judge the following statement: units that we usually use to evaluate strain are mm and inch. A.) True. B.) False. - Answers B What is the name of a copper zinc alloy? A.) Brass. B.) Bronze - Answers A Which one of the following materials has the lowest carbon content? A.) Cold finish mild steel B.) White cast iron. C.) T10 tool steel. - Answers A Please judge the following statement: units that we usually use to evaluate stress are MPa (mega pascal) and psi (pound per square inch) A.) True. B.) False. - Answers A Stainless steel's resistance to corrosion and staining and low maintenance make it an ideal material for many applications. Besides carbon and iron, stainless steel must also have __________ (element). A.) tungsten B.) cobalt C.) titanium D.) chromium - Answers D Which one of the following is NOT a safe practice in a machine shop? A.) Always stop the machine before cleaning it or taking measurements of the workpiece. B.) Always wear gloves when operating machinery. C.) Do not lubricate a machine while it is in motion. D.) Always secure the workpiece. Use clamps or a vise. - Answers B The ductility of a steel test specimen can be found out by studying ___________. A.) the ability of the specimen to absorb mechanical shocks without fracturing B.) the ability of the specimen to stretch before it fractures C.) the maximum force the specimen can take before it fractures D.) the maximum force the specimen can take before it deforms permanently - Answers B The tensile strength of the steel wire at the bent location will be __________. A.) increased B.) decreased C.) the same - Answers A The Young's modulus of the steel wire at the bent location will be ___________. A.) increased B.) decreased C.) the same - Answers C The yield strength of the steel wire at the bent location will be __________. A.) increased B.) decreased C.) the same - Answers A Please identify what type(s) of deformation happened during this paper clip bending process. A.) Plastic deformation. B.) Elastic deformation. C.) Both A and B. - Answers C The steel wire to make paper clips is manufactured by (wire) drawing, which belongs to ___________ material processing. A.) casting B.) consolidation C.) deformation D.) removal - Answers C Which material is most likely to be a ceramic material (instead of other types of engineering materials)? A.) high stress, low strain B.) mid stress, mid strain C.) low stress, high strain - Answers A Which material is the most machinable? A.) high stress, low strain B.) mid stress, mid strain C.) low stress, high strain - Answers C Which material is the stiffest? A.) high stress, low strain B.) mid stress, mid strain C.) low stress, high strain - Answers A Two samples (A and B) after the above tensile tests are shown as below. Please judge which one is more likely the sample characterized by the above stress-strain curve A (high stress, low strain)? A.) clean break, not stretched B.) rigid break, very stretched - Answers A Generally speaking, for a steel, as its tensile strength decreases, its hardness __________. A.) increases B.) decreases C.) hard to say the trend - Answers B Wear resistance is one of the __________ of an engineering material. A.) mechanical properties B.) physical properties - Answers A __________ do not exhibit a yield point, so can offset yield point (commonly set at 0.2% strain) is used on these materials. A.) Low carbon steels B.) Aluminum alloys - Answers B In these two schematics of metal microstructures on your right, __________ is deformed with a higher strain. A.) spread out curls, large sections B.) tight curls, small sections - Answers B The gateway arch at St. Louis (see the figure to the right) is made from stainless steel (the cross-section has a triangular shape). Several ideas are proposed to make the structure less rigid if another arch were to be built. You are to judge (using the knowledge you have learned from IMSE 250) if each idea would help to increase the swing. Heat treatment of the stainless steel. A.) Would help B.) Would NOT help - Answers B The gateway arch at St. Louis (see the figure to the right) is made from stainless steel (the cross-section has a triangular shape). Several ideas are proposed to make the structure less rigid if another arch were to be built. You are to judge (using the knowledge you have learned from IMSE 250) if each idea would help to increase the swing. Use aluminum alloy instead of stainless steel. A.) Would help B.) Would NOT help - Answers A Which one of the following phases does NOT have a body-centered cubic crystal structure? A.) Ferrite B.) Austenite C.) Cementite D.) Martensite - Answers B A six sigma process is one in which 99.99966% of all opportunities to produce some feature of a part are statistically expected to be free of defects (3.4 defective features per million opportunities). Sigma refers to the mathematical concepts of ___________. A.) variance B.) standard deviation C.) mean D.) confidence interval - Answers B Annealing in a furnace gives _________ steel than normalizing in still air. A.) weaker and more brittle B.) weaker and more ductiles C.) stronger and more ductile D.) stronger and more brittle - Answers B What is the eutectoid crystallization structure generated by following the isothermal cooling curve (dash line) shown in the figure on the right? A.) Austenite and pearlite B.) Pearlite C.) Martensite and pearlite D.) Bainite and pearlite - Answers B A steel bar (carbon content known) is heated to a certain temperature and kept at that temperature for a long time. Which diagram would you use to find out the crystallization structure of this steel at the heated temperature? A.) Iron-Carbon Equilibrium diagram B.) Continuous-Cooling-Transformation diagram - Answers A