Circle all correct statements. Plastic deformation a. Is permanent. b. Is recoverable. c. Can be described using a spring analogy. d. Is associated with necking. e. Can be uniform or non-uniform. f. Is important for metal forming operations.
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- Vickers Hardness Number (HV) value is inversely proportional to a. Indentation mean diagonal b. All of the above c. Shape of indenter d. Force appliedMillimeter 17. Which part of the marking gauge is used to mark lines on wood? To measure the ductility of weld metal b. To test the skill of a welder To perform a non-destructive test d. To approve welds to certain standards a. C. 18. Compressive stress can be defined or described 2s an internal force in a material resisting a. a pulling load. b. shearing load. pulling and shearing load. d. pushing.load. • C. 19. Which plane more suitable for further smoothing a planed surface? Router plane. b. Trying plane. c. Smoothing plane. a. 20. Which one of the following is gives the name of the screw? a. Siot. b. Thread. Head. d. Shank. C. 21. How to hold the hammer handle while driving the naii? Middle of the handle. * b. Anywhere in length of the handle. C. Near the hammer head of the handle. End of the handle a. USF ال لجنة العلمية d. File isTo approve D. Compressive stress can be defined or described as an internal force in a matefa 26. resisting a A. shearing load. B. pulling load. C. pulling and shearing load. D. pushing load. 27. The following material is being order as the most hardiness material. A. Glass, Lead, Aluminum, Gray iron B. Gray iron, Aluminum, Glass, Lead C. Aluminum, Gray iron, Glass, Lead D. Glass, Grày iron, Aluminum, Lead 28. The edges of a cast iron block weighing 32 kg were rounded off with a mil u the block was reweighed, it was found to weigh only 29.5 kg. What percentage of original cast iron block was lost? A. 7.8% 8.5% 4% D. 2.5% В. С. oil vve
- 20- Vickers Hardness Number (HV) value is directly proportional to a. Shape of indenter b. Indentation mean diagonal c. All of the above d. Force appliedWhich of the following is NOT TRUE? Choose one: a. Even though a material has a Poisson's ratio of 0, its moduli of elasticity and stiffness can still be related.b. The modulus of rigidity to modulus of elasticity ratio is constant.c. The highest modulus of elasticity to modulus of rigidity ratio for most materials is 3.d. Two materials with the same moduli of elasticity and rigidity but different Poisson's ratio values can exist.Strain energy is the A. energy stored in a body when strained within elastic limits B. energy stored in a body when strained upto the breaking of a specimen C. maximum strain energy which can be stored in a body D. proof resilience per unit volume of a material
- What information does a hardness test reveal?A material with high modulus of elasticity is a. Tougher O b. Ductile C. Stiffer d. Brittle12. Temporary joint is obtained by one of the following. welding Rivetinng Interference fit Threaded Connection a. b. C. d. 13. What is pattern? A. The replica or facsimile of model. b. The pattern of machine. The casting. d. Farming mould in sand.. a. C. 14. What is the use of pattern of prepared by the pattern maker? It is object made by wood. b. Farming an impression on mould sand. To product a sound casting. d. Farming the model of anything. a. C. 15. What is the size of pattern? a. The size of pattern is different than size of casting b. The size of pattern is slightly less in dimension than the casting Page 4 of 7
- Which would be the most likely to measure for an inflated baloon? A. Shear modulus b bulk modulus c young mod If we want to make sure a piece of metal does not easily get bent out of shape, which would be most important to measure for the metal? A. Young b shear c bulk (modulus)4) For thread connections, when one of the materials is thicker and it's used for frequent assembly and disassembly, we should use A. Bolt Connection B. Stud Connection C. Screw Connection 5) The product of the load factor K and the nominal load is_ A. Assumed load B. Nominal load C. Rated load 6) The shaft in the front wheel of bike is B. Shafts in bending only A. Shafts in bending and torsion C. Shafts in torsion mainlyWhat is the proportionality limit? a. Limit up to which the necking begins b. Limit up to which the material breaks c. Limit up to which Hooke’s law is valid d. Limit up to which the stress is proportional to strain e. Both C & D The elastic limit of a material is _______. a. The least amount of stress that can be held without permanent deformation b. Highest stress a material can experience without permanent deformation c. Average stress experienced by material in its lifeline d. Strain on material The true stress-strain curve for materials is plotted between ______ a. Load/original cross-sectional area and change in length/original length b. Load/instantaneous cross-sectional area and log (length/original length) c. Load/instantaneous cross-sectional area and change in length/original length d. Load/instantaneous cross-sectional area and instantaneous area/original area. The tensile test is carried on ____ materials. a. Ductile b. Brittle c. Malleable…