EBK MANUFACTURING PROCESSES FOR ENGINEE
6th Edition
ISBN: 9780134425115
Author: Schmid
Publisher: YUZU
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Chapter 5, Problem 5.104D
To determine
The manner in which the ribs and serrations help in casting flat surfaces.
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As quick as possible.
Describe some common casting faults, and suggest steps that may be taken to minimize the risk of such faults occurring.
The primary function of a riser is to
(a) feed molten metal to casting as it solidifies
(b) prevent atmospheric air from
contaminating the metal in the mould
(c) allow gases to easily escape from mould cavity
D)allow molten metal to rise above the mould cavity
3. (Slow or Fast, which one? – Circle one) cooling rates results in coarse dendritic structures.
4. The higher the viscosity of the melt, the .
its fluidity?
5. Name 3 defects in casting:
6. Internal or external
are an effective means of reducing shrinkage porosity during solidification.
7. Is green-sand molding expensive?
8.
.... are inserts placed in the molds to form the hollow regions in casting.
9. The method of casting turbine blades:
Sample A
10. Which one has higher stiffness? Sample A or Sample B
Sample B
11. Which one has higher toughness? Sample A or Sample B
12. Which one has higher strength? Sample A or Sample B
13. Which one has higher ductility? Sample A or Sample
14. Higher
......... means more rigidity.
Strain
15. Before the no-slip point, the velocity is (higher or lower, which one? - Circle one)
16. In flat-rolling process, using smaller diameter rolls (increases or decreases, which one? - Circle one) the roll
force.
17. Balls for ball bearings can be made by
rolling…
Chapter 5 Solutions
EBK MANUFACTURING PROCESSES FOR ENGINEE
Ch. 5 - Prob. 5.1QCh. 5 - Prob. 5.2QCh. 5 - Prob. 5.3QCh. 5 - Prob. 5.4QCh. 5 - Prob. 5.5QCh. 5 - Prob. 5.6QCh. 5 - Prob. 5.7QCh. 5 - Prob. 5.8QCh. 5 - Prob. 5.9QCh. 5 - Prob. 5.10Q
Ch. 5 - Prob. 5.11QCh. 5 - Prob. 5.12QCh. 5 - Prob. 5.13QCh. 5 - Prob. 5.14QCh. 5 - Prob. 5.15QCh. 5 - Prob. 5.16QCh. 5 - Prob. 5.17QCh. 5 - Prob. 5.18QCh. 5 - Prob. 5.19QCh. 5 - Prob. 5.20QCh. 5 - Prob. 5.21QCh. 5 - Prob. 5.22QCh. 5 - Prob. 5.23QCh. 5 - Prob. 5.24QCh. 5 - Prob. 5.25QCh. 5 - Prob. 5.26QCh. 5 - Prob. 5.27QCh. 5 - Prob. 5.28QCh. 5 - Prob. 5.29QCh. 5 - Prob. 5.30QCh. 5 - Prob. 5.31QCh. 5 - Prob. 5.32QCh. 5 - Prob. 5.33QCh. 5 - Prob. 5.34QCh. 5 - Prob. 5.35QCh. 5 - Prob. 5.36QCh. 5 - Prob. 5.37QCh. 5 - Prob. 5.38QCh. 5 - Prob. 5.39QCh. 5 - Prob. 5.40QCh. 5 - Prob. 5.41QCh. 5 - Prob. 5.42QCh. 5 - Prob. 5.43QCh. 5 - Prob. 5.44QCh. 5 - Prob. 5.45QCh. 5 - Prob. 5.46QCh. 5 - Prob. 5.47QCh. 5 - Prob. 5.48QCh. 5 - Prob. 5.49QCh. 5 - Prob. 5.50QCh. 5 - Prob. 5.51QCh. 5 - Prob. 5.52QCh. 5 - Prob. 5.53QCh. 5 - Prob. 5.54QCh. 5 - Prob. 5.55QCh. 5 - Prob. 5.56QCh. 5 - Prob. 5.57QCh. 5 - Prob. 5.58QCh. 5 - Prob. 5.59QCh. 5 - Prob. 5.60QCh. 5 - Prob. 5.61PCh. 5 - Prob. 5.62PCh. 5 - Prob. 5.63PCh. 5 - Prob. 5.64PCh. 5 - Prob. 5.65PCh. 5 - Prob. 5.66PCh. 5 - Prob. 5.67PCh. 5 - Prob. 5.68PCh. 5 - Prob. 5.69PCh. 5 - Prob. 5.70PCh. 5 - Prob. 5.71PCh. 5 - Prob. 5.72PCh. 5 - Prob. 5.73PCh. 5 - Prob. 5.74PCh. 5 - Prob. 5.75PCh. 5 - Prob. 5.76PCh. 5 - Prob. 5.77PCh. 5 - Prob. 5.78PCh. 5 - Prob. 5.79PCh. 5 - Prob. 5.80PCh. 5 - Prob. 5.81PCh. 5 - Prob. 5.82PCh. 5 - Prob. 5.83PCh. 5 - Prob. 5.84PCh. 5 - Prob. 5.85PCh. 5 - Prob. 5.86PCh. 5 - Prob. 5.87PCh. 5 - Prob. 5.88PCh. 5 - Prob. 5.89PCh. 5 - Prob. 5.90PCh. 5 - Prob. 5.91PCh. 5 - Prob. 5.92PCh. 5 - Prob. 5.93DCh. 5 - Prob. 5.94DCh. 5 - Prob. 5.95DCh. 5 - Prob. 5.96DCh. 5 - Prob. 5.97DCh. 5 - Prob. 5.98DCh. 5 - Prob. 5.99DCh. 5 - Prob. 5.100DCh. 5 - Prob. 5.101DCh. 5 - Prob. 5.102DCh. 5 - Prob. 5.103DCh. 5 - Prob. 5.104DCh. 5 - Prob. 5.105DCh. 5 - Prob. 5.106DCh. 5 - Prob. 5.107DCh. 5 - Prob. 5.108DCh. 5 - Prob. 5.109DCh. 5 - Prob. 5.110DCh. 5 - Prob. 5.111DCh. 5 - Prob. 5.112DCh. 5 - Prob. 5.113DCh. 5 - Prob. 5.114DCh. 5 - Prob. 5.115D
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- In sand casting, the volumetric size of the pattern is (a) bigger than, (b) same size as, (c) smaller than the cast part?arrow_forwardWhat is the advantage in casting turbine blades that have either highly aligned grain boundaries or no grain boundaries at all?arrow_forward2. What are the general defects found in casting processes? Name and briefly describe two.arrow_forward
- 4) List the passageway (gating system) elements in sand casting moulds and show them with drawing? Draw the stress-strain curve and gives the stress and strain equations for both Engineering and True stress-strainarrow_forwardDescribe the stages involved in the contraction of metals during casting.(a) Contraction of the molten metals as it cools prior to its solidification.(b) Contraction of the metal during phase change from liquid to solid.(c) Contraction of the solidified metals as its temperature drops to ambient temperature.(d) All of above.(e) None of above.2. What kinds of defects in castings?(a) Hot tear.(b) Surface scar.(c) Plastic deformation.(d) Ductile flow.3. How does porosity have detrimental effects on the mechanical and physical properties ofcastings?(a) Pores in castings are resulted from internal discontinuities when that are prone topropagate under external stresses.(b) The toughness of a material will decrease as a result of porosity.(c) Physical properties, such as thermal and electrical conductivity, also be adverselyaffected by porosity.(d) Pores increase the strength and elastic modulus.(e) Porosity increases both the thermal and electrical conductivity4. Thermosetting plastics can…arrow_forwardWhich among the following design considerations for casting to be followed to reduce stress concentration in parts? O a. Shape the casting for orderly solidification O b. Avoid abrupt changes in cross section Oc Avoid thin sections O d. Make provision for easy removal of pattern from the mouldarrow_forward
- Mention all the features of centrifugal casting.arrow_forward2. What do the various elements that comprise the gating system? what are the pouring basin in a sand casting? 3. Explain why a sprue should be tapered? 4. What are the disadvantages of die casting? 5. Explain the various kinds of patterns in use. What are the allowances provided How do the patterns differ from the casting required? 6. Define Expendable-mold, Expendable-pattern Casting Processesarrow_forwardConverging passage is used for feeding the liquid molten metal into the mould to (a) increase the rate of feeding (b) quickly break off the protruding portion of the casting (c) decrease wastage of cast metal (d) avoid aspiration of airarrow_forward
- EX.3//A cylindrical riser must be designed for a sand-casting mold. The casting itself is a steel rectangular plate with dimensions 7.5 cm x 12.5 cm x 2.0 cm. Previous observations have indicated that the total solidification time (TTs) for this casting =1.6 min. The cylinder for the riser will have a diameter-to-height ratio=1.0. Determine the dimensions of the riser so that its TTS = 2.0 min.arrow_forwardIn turbine blade casting, how is a single-crystal structure achieved? Select one or more: a. By using a curving coil-like channel in the casting mould b. By removing grain boundaries by hot working and recrystallisation c. By careful control of the temperatures of the mould d. By introducing impurities into the molten alloy in the mouldarrow_forwardA vertical centrifugal casting process is used to produce bushings that are 0.2 m outside diameter and 0.2 m in long. If the rotational speed during solidification is 500 rpm, determine the inside diameter at the bottom of the bushing if the diameter at the top is 0.084 m. * Add filearrow_forward
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