Keys for Exam 2 Spring 2007

Keys for Exam 2 Spring 2007 - Name: IMSE 250 Exam 2 on...

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Name: IMSE 250 Exam 2 on March 29, 2007 (50 questions in total, 4 points for each question) (1) Both brasses and bronzes do not contain any copper in them. (A) True. (B) False. (2) A steel part is heated to very high temperature (above the Austenite temperature) and kept at that temperature for a long time (say, five hours). It then is cooled down to room temperature at a given rate. You have all the diagrams for this steel. Which diagram would you use to find out the structure of this steel at the room temperature? (A) Equilibrium diagram. (B) Isothermal Transformation diagram. (C) Time-Temperature-Transformation diagram. (D) Continuous-Cooling-Transformation diagram. (3) As the carbon content increases, steel becomes softer. (A) True. (B) False. (4) ___________ is the process of machining internal cylindrical and conical surfaces; ________ is the process of machining external cylindrical and conical surfaces. (A) Boring/Turing (B) Turning/Boring (5) On a lathe, the key operating parameters are _____________. (A) Tool material, tool geometry, and machine horsepower. (B) Cutting speed, feed rate, and depth of cut. (C) Workpiece material, workpiece diameter, and workpiece hardness. (6) Which one of the following groups is a wrong association? (A) Open-die forging no limit in size; Close-die forging small to medium size. (B) Close-die forging no limit in size; Open-die forging small to medium size. (7) One major difference between isothermal forging and hot-die forging is the die temperature. For ________, the die-temperature keeps the same as the forging temperature of the material. But for the other, the die-temperature is lower than the forging temperature. (A) hot-die forging (B) isothermal forging (8) Which one of the following statements is NOT true regarding a honing operation? (A) The tool used is a stone made by bonded abrasives. (B) It cannot remove small amount of material from the surface of holes (or external and flat surfaces). (C) It removes common errors left by boring (taper, waviness, tool marks). (D) It can remove grinding marks left by grinding. (9) In drilling operation by a standard twist drill, the cutting speed along the main cutting edges (lips) is ____________ (A) not same at different points. (B) same at different points. 1
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(10) Which one of the following orders represents the surface roughness order (from the smoothest to the roughest) generated by these processes? (A) Honing > Reaming > Drilling.
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This note was uploaded on 04/08/2008 for the course IMSE 250 taught by Professor Pei during the Spring '07 term at Kansas State University.

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Keys for Exam 2 Spring 2007 - Name: IMSE 250 Exam 2 on...

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