ENME 417 Old Exams

123 flashcards · Other · by Dylan Matwe

  1. 1. Friction stir welding is an example of which type of joining process? a. Fusion welding b. Arc welding c. Soldering d. Brazing e. None of the above

    e

  2. 2. Which is the best method to make aluminum foams for automotive applications? a. PM (Powder Metallurgy) b. Sand Casting c. EDM d. None of the above

    ✅ Answer: a. PM

  3. 3. The part of the mold cavity which supplies additional metal to compensate for shrinkage during solidification is called? a. Cope b. Gate c. Chills d. None of the above

    ✅ Answer:d. None of the above (Correct term: Riser)

  4. 4. In sheet metal work, when the springback factor is 1, it represents: a. No elastic recovery of sheet metal b. Total elastic recovery of sheet metal c. 50% elastic, 50% plastic d. None of the above

    ✅ Answer: a. No elastic recovery of sheet metal

  5. 5. The parting line in injection molding is: a. The lines formed where polymer melt meets after flowing around a core in the mold b. The narrow gate sections where the parts are separated from the runner c. Where the clamping unit is joined to the injection unit in the molding machine d. Where the two mold halves come together e. None of the above

    ✅ Answer: d. Where the two mold halves come together

  6. 6. Which of the following methods is the most suitable to measure residual stress? a. Eddy current b. XRD c. CVD d. None of the above

    ✅ Answer: b. XRD (X-ray Diffraction)

  7. 7. Which of the following should be avoided in sheet metal processing? a. Overbending the part b. Reduction of thickness c. Springback d. None of the above

    ✅ Answer: b. Reduction of thickness

  8. 8. Which of the following methods is the optimum process to join multiple razor blades? a. Diffusion Bonding b. EDM c. Resistance welding d. Forge welding e. None of the above

    ✅ Answer:c. Resistance welding

  9. 9. In the stress-strain diagram, point “B” represents which kind of relationship? a. Linear Elastic/Perfectly Plastic b. Linear Elastic/Plastic c. Rigid-Perfectly Plastic d. Rigid/Linear hardening e. None of the above

    ✅ Answer:a. Linear Elastic/Perfectly Plasti

  10. 10. In the stress-strain diagram, point “D” represents what kind of relationship? a. Linear Elastic/Perfectly Plastic b. Linear Elastic/Plastic c. Rigid-Perfectly Plastic d. Rigid/Linear hardening e. None of the above

    ✅ Answer:d. Rigid/Linear hardening

  11. 11. Which cutting condition has the greatest effect on chatter in milling operations? a. Depth of cut b. Feed rates c. Use of lubricant d. All of the above equally affect chatter

    ✅ Answer:a. Depth of cut

  12. 12. For a tension test, the area under the entire curve is a measure of: a. Elasticity b. Resilience c. Toughness d. Ductility

    ✅ Answer:c. Toughness

  13. 13. Which factor is not a concern for machinability of materials? a. Surface integrity b. Tool life c. Friction d. The level of difficulty in chip control

    ✅ Answer:c. Friction

  14. 14. In evaporation mold casting, the pattern is made of what? a. Wood b. Metal c. Plaster d. Polystyrene e. None of the above

    ✅ Answer: d. Polystyrene

  15. 15. Redundant work in bulk deformation is a function of: a. Friction b. Non-uniform deformation c. Residual stresss d. None of the above

    ✅ Answer:b. Non-uniform deformation

  16. 16. What is the maximum draft possible in rolling when the roller radius is 0.1 m, and the friction coefficient is 0.1? a. 0.1 m b. 0.001 m c. 0.01 m d. None of the above

    ✅ Answer:c. 0.01 m (Draft = μ² × R = 0.01)

  17. 17. Which of the following is not an example of a defect associated with rolling? a. Wavy edges b. Chevron cracks c. Alligatoring d. Edge cracks

    ✅ Answer:b. Chevron cracks

  18. 18. Which phase is present at 600°C and 0.5% carbon in the Iron-Carbon diagram? a. Austenite b. Ferrite c. Pearlite d. Cementite e. None of the above

    ✅ Answer:c. Pearlite

  19. 19. Boring is used for which of the following functions? (Select all that apply) I. Accurately locating a hole II. Enlarging a previously made hole III. Improving surface finish IV. Improving tolerance V. Creating an internal thread VI. Creating an external thread

    I, II, III, IV

  20. 20. Which of the following is not a common filler material for brazing? a. Silver alloys b. Copper alloys c. Nickel alloys d. Tin alloys e. None of the above

    ✅ Answer:d. Tin alloys

  21. 21. Neoprene is an example of: a. Thermosets b. Thermoplastics c. Elastomers d. Composite

    ✅ Answer:c. Elastomers

  22. 22. Martensitic transformation results in what crystalline structure? a. HCP b. BCT c. BCC d. None of the above

    ✅ Answer:b. BCT (Body-Centered Tetragonal)

  23. 23. How would you create a square pocket (6000 mm × 0.02 mm deep) in 5 mm thick steel? a. Abrasive waterjet machining b. Plunge EDM c. Chemical milling d. Laser beam machining e. Oxy-fuel cutting

    ✅ Answer:c. Chemical milling

  24. 24. Which arc welding process uses a consumable electrode? a. Ultrasonic Welding b. GTAW (TIG) c. Resistance Welding d. None of the above

    ✅ Answer:d. None of the above (Correct answer should be SMAW or GMAW, not listed)

  25. 25. Selective Laser Sintering (SLS) is: a. An additive process b. A subtractive process c. A casting process d. None of the above

    ✅ Answer:a. An additive process

  26. 26. A misrun is a defect caused by: a. Entrapped globules b. Premature solidification c. Micro porosity d. Metal not properly poured

    ✅ Answer:b. Premature solidification

  27. 27. How would you manufacture Jacuzzi bathtubs (Qty: 500)? a. Rapid prototyping b. Thermoforming c. Injection molding d. None of the above

    ✅ Answer:b. Thermoforming

  28. Which of the following processes are used to provide the thin coatings on the surface of coated carbide inserts used in machining processes: I. Chemical vapour deposition II. Electroplating III. Pressing and Sintering IV. Physical vapour deposition V. Spray painting

    (I. CVD, IV. PVD)

  29. 29. Best way to generate a keyway in an aircraft rotor hub? a. Grinding b. Broaching c. Reaming d. None of the above

    ✅ Answer:b. Broaching

  30. 30. Best way to manufacture copper electrical wires? a. Extrusion b. Progressive die forging c. Rolling d. None of the above

    ✅ Answer:c. Rolling

  31. 31. Which process produces the least favorable metallurgical properties? a. Grinding b. Casting c. Machining d. Forging

    ✅ Answer:b. Casting

  32. 32. Drilled holes are often finished by: a. Grinding b. Reaming c. Shaping d. Spinning

    ✅ Answer:b. Reaming

  33. 33. Which is not a factor affecting sheet metal deformation? a. Elongation b. Anisotropy c. Residual stress d. None of the above

    ✅ Answer:d. None of the above

  34. 34. Which option is not related to metrology? a. AFM b. XRD c. Micrometer d. None of the above

    ✅ Answer:b. XRD (It’s for material analysis, not dimensional measurement)

  35. 35. Best abrasive for grinding non-ferrous metals like aluminum? a. Silicon carbide b. Cubic boron nitride c. Diamond d. Aluminum oxide e. All of the above

    ✅ Answer:a. Silicon carbide

  36. 36. Which of the following does not describe Industry 4.0? a. Internet b. IoT c. Cloud d. AI e. None of the above

    ✅ Answer:e. None of the above

  37. 37. How are artificial diamonds manufactured? a. PVD b. Electron beam c. Carburizing d. All of the above e. None of the above

    ✅ Answer:a. PVD (Chemical vapor deposition is more accurate, but PVD is close)

  38. 38. Best way to manufacture golf clubs (Qty: 10,000)? a. Investment casting b. Sand casting c. Progressive die forging d. None of the above

    ✅ Answer:c. Progressive die forging

  39. 39. How to manufacture large aluminum pots (Qty: 1,000)? a. Sand casting b. Spinning c. Stamping d. None of the above

    ✅ Answer: b. Spinning

  40. 40. Best method to manufacture magnets (Qty: 20,000)? a. PM (Powder Metallurgy) b. Injection molding c. Grinding d. None of the above

    ✅ Answer:a. PM

  41. 41. Which is not a process in Powder Metallurgy? a. Sintering b. Blending c. Compaction d. None of the above

    ✅ Answer:d. None of the above

  42. 42. Process used to fabricate aluminum window frames: a. Deep drawing b. Extrusion c. Punching d. Stamping

    ✅ Answer:b. Extrusion

  43. 43. In facing on a lathe with 75 mm diameter at 450 rpm, cutting speed: a. 106 m/min b. 53 m/min c. It decreases d. It increases

    ✅ Answer:b. 53 m/min (Cutting speed = π × D × N / 1000 = ~53 m/min)

  44. 44. Which does not describe Vulcanization? a. High Temperature b. Sulfur c. Cross linking d. None of the abov

    ✅ Answer:d. None of the above

  45. 45. Which of the following is an incorrect statement about solid solution strengthening? a. Alloying process b. Mixing metals in liquid state and cooling yields a solid part c. Especially for mixing dissimilar size particles d. None of the above

    ✅ Answer:d. None of the above

  46. D

  47. C

  48. D

  49. A

  50. D

  51. B

  52. A

  53. E

  54. B

  55. D

  56. C

  57. A

  58. A

  59. A

  60. D

  61. B

  62. D

  63. A

  64. C

  65. B

  66. C

  67. C

  68. C

  69. A

  70. B

  71. C

  72. A or B

  73. C

  74. B

  75. E

  76. D

  77. B

  78. D

  79. B, C, order D

  80. B

  81. A

  82. A

  83. E

  84. C

  85. D

  86. C is best, but also B oder D

  87. B

  88. E

  89. F

  90. C

  91. D

  92. A or C

  93. E

  94. D

  95. E

  96. C

  97. A

  98. A

  99. E

  100. C