© Mikell P. Groover 2013
Chapter 15 BULK DEFORMATION PROCESSES IN METAL WORKIING
Multiple Choice Quiz
There are 34 correct answers in this multiple choice quiz (some questions have multiple answers that are correct). To achieve a perfect score on the quiz, all correct answers must be given. Each correct answer is worth 1 point. Each omitted answer or wrong answer reduces the score by 1 point. Percentage score on the quiz is based on the total number of correct answers.
15.1Which of the following are basic bulk deformation processes in metal forming (three correct answers): (a) bar drawing, (b) blanking, (c) deep drawing, (d) extrusion, (e) forging, and (f) stamping?
15.2Rolling is a bulk deformation process in which the thickness of the work is reduced by compressive forces exerted by two opposing rolls: (a) true or (b) false?
15.3The starting workpiece in hot rolling of steel plate and sheet stock is which one of the following: (a) bar stock, (b) billet, (c) bloom, (d) slab, or (e) wire stock?
15.4Furnaces used to heat cast steel ingots to achieve a uniform temperature throughout prior to rolling are called which of the following (one best answer): (a) annealing furnaces, (b) heat treating ovens, (c) soaking pits, or (d) tempering furnaces?
15.5The maximum possible draft in a rolling operation depends on which of the following parameters (two correct answers): (a) coefficient of friction between roll and work, (b) roll diameter, (c) roll velocity, (d) stock thickness, (e) strain, and (f) strength coefficient of the work metal?
15.6Which of the following stress or strength parameters is used in the computation of rolling force (one best answer): (a) average flow stress, (b) compression strength, (c) final flow stress, (d) tensile strength, or (e) yield strength?
15.7Which of the following rolling mill types are associated with relatively small diameter rolls in contact with the work (two correct answers): (a) cluster mill, (b) continuous rolling mill, (c) fourhigh mill, (d) reversing mill, and (e) threehigh configuration?
15.8Production of pipes and tubes is associated with which of the following bulk deformation processes (three correct answers): (a) extrusion, (b) hobbing, (c) ring rolling, (d) roll forging, (e) roll piercing, (f) tube sinking, and (g) upsetting?
15.9Which of the following stress or strength parameters is used in the computation of the maximum force in a forging operation (one best answer): (a) average flow stress, (b) compression strength, (c) final flow stress, (d) tensile strength, or (e) yield strength?
15.10Which of the following operations are closely related to open-die forging (three best answers): (a) cogging, (b) flashless forging, (c) fullering, (d) impression-die forging, (e) Mannesmann process, (f) precision forging, and (g) upsetting?
15.11Flash in impression die forging serves no useful purpose and is undesirable because it must be trimmed from the part after forming: (a) true or (b) false?
15.12Which of the following are classified as forging operations (four correct answers): (a) coining, (b) fullering, (c) impact extrusion, (d) roll piercing, (e) swaging, (f) thread rolling, (g) trimming, and (h) upsetting?
15.13Which of the following are alternative names for indirect extrusion (two correct answers): (a) backward extrusion, (b) direct extrusion, (c) forward extrusion, (d) impact extrusion, and (e) reverse extrusion?
15.14Production of tubing is possible in indirect extrusion but not in direct extrusion: (a) true or (b) false?
15.15In metal extrusion, the extrusion ratio is also known by which of the following terms (one best answer): (a) area reduction, (b) draft, (c) reduction, or (d) reduction ratio?
15.16Which of the following stress or strength parameters is used in the computation of the force in an extrusion operation (one best answer): (a) average flow stress, (b) compression strength, (c) final flow stress, (d) tensile strength, or (e) yield strength?
15.17In which of the following extrusion operations is friction a factor in determining the extrusion force: (a) direct extrusion or (b) indirect extrusion?
15.18Theoretically, the maximum reduction possible in a wire drawing operation, under the assumptions of a perfectly plastic metal, no friction, and no redundant work, is which one of the following: (a) zero, (b) 0.63, (c) 1.0, or (d) 2.72?
15.19Which of the following bulk deformation processes are involved in the production of nails for lumber construction (three best answers): (a) bar and wire drawing, (b) extrusion, (c) flashless forging, (d) impression die forging, (e) rolling, and (f) upsetting?
15.20Johnson's formula is associated with which one of the four bulk deformation processes: (a) bar and wire drawing, (b) extrusion, (c) forging, and (d) rolling?
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