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For the process shown in the schematic below, which of the statements is/are incorrect? Feed hopper Feed hopper Mold cavity Mold Nozzle Spreader Heating chamber 3 Ram Hydraulic pressure Plastic pellets Which statement is incorrect regarding the mechanical characteristics of polymers? B Turning screw Barrel O a. Elongation at break is typically greater for polymers than metals O b. Metals typically have higher tensile strength but lower elastic modulus than polymers O C. The elastic modulus of semi-crystalline polymers rises as chain entanglement decreases Od. Decreasing the temperature results in increased brittleness in polymers O e. Amorphous and semi-crystalline polymers both become brittle at lower temperatures Of. Polymers are similar to metals i.e., they can also exhibit both ductile and brittle fracture Select one: O a. The region around B experiences mainly compressive strain Consider a defect in a crystalline lattice as shown below. Which of the following statements is true? Heaters Select one or more: O a. To release the part, the process typically involves the mould sections opening and the ejector pins pushing the object out of the mould O b. The process can only work with thermoplastics and not with thermosets due to the thermal processing requirements O c. The mould cavity region is usually temperature controlled so that at the point of injection it is heated and then gradually cooled down until the part is released Od. This process is best suited for the large volume production of tubes, bars and beams due to the nature of the extrusion process Oe. The feedstock has to be molten or liquid monomer, the temperature of which will constantly be held above the melting temperature O b. The region around B experiences mainly shear strain O c. The region around B is unaffected by the impurity O d. The region around B experiences a higher strain on the upper side compared to the lower side Shaping die Molten plastic Extrudate Tubing and pipes Sheet and film Structural parts

For the process shown in the schematic below, which of the statements is/are incorrect? Feed hopper Feed hopper Mold cavity Mold Nozzle Spreader Heating chamber 3 Ram Hydraulic pressure Plastic pellets Which statement is incorrect regarding the mechanical characteristics of polymers? B Turning screw Barrel O a. Elongation at break is typically greater for polymers than metals O b. Metals typically have higher tensile strength but lower elastic modulus than polymers O C. The elastic modulus of semi-crystalline polymers rises as chain entanglement decreases Od. Decreasing the temperature results in increased brittleness in polymers O e. Amorphous and semi-crystalline polymers both become brittle at lower temperatures Of. Polymers are similar to metals i.e., they can also exhibit both ductile and brittle fracture Select one: O a. The region around B experiences mainly compressive strain Consider a defect in a crystalline lattice as shown below. Which of the following statements is true? Heaters Select one or more: O a. To release the part, the process typically involves the mould sections opening and the ejector pins pushing the object out of the mould O b. The process can only work with thermoplastics and not with thermosets due to the thermal processing requirements O c. The mould cavity region is usually temperature controlled so that at the point of injection it is heated and then gradually cooled down until the part is released Od. This process is best suited for the large volume production of tubes, bars and beams due to the nature of the extrusion process Oe. The feedstock has to be molten or liquid monomer, the temperature of which will constantly be held above the melting temperature O b. The region around B experiences mainly shear strain O c. The region around B is unaffected by the impurity O d. The region around B experiences a higher strain on the upper side compared to the lower side Shaping die Molten plastic Extrudate Tubing and pipes Sheet and film Structural parts

Elements Of Electromagnetics
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
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Can you please answer these 3 questions from material engineering.....

For the process shown in the schematic below, which of the statements is/are incorrect? Feed hopper Feed hopper Mold cavity Mold Nozzle M Spreader XXXX Heating chamber O b. Ram Hydraulic pressure Which statement is incorrect regarding the mechanical characteristics of polymers? O C. Plastic pellets 50 Turning screw a. Elongation at break is typically greater for polymers than metals b. Metals typically have higher tensile strength but lower elastic modulus than polymers O C. The elastic modulus of semi-crystalline polymers rises as chain entanglement decreases O d. Decreasing the temperature results in increased brittleness in polymers Oe. Amorphous and semi-crystalline polymers both become brittle at lower temperatures Of. Polymers are similar to metals i.e., they can also exhibit both ductile and brittle fracture Select one: O a. The region around B experiences mainly compressive strain Consider a defect in a crystalline lattice as shown below. Which of the following statements is true? B Barrel Select one or more: O a. To release the part, the process typically involves the mould sections opening and the ejector pins pushing the object out of the mould O b. The process can only work with thermoplastics and not with thermosets due to the thermal processing requirements O c. The mould cavity region is usually temperature controlled so that at the point of injection it is heated and then gradually cooled down until the part is released Od. This process is best suited for the large volume production of tubes, bars and beams due to the nature of the extrusion process e. The feedstock has to be molten or liquid monomer, the temperature of which will constantly be held above the melting temperature The region around B experiences mainly shear strain The region around B is unaffected by the impurity O d. The region around B experiences a higher strain on the upper side compared to the lower side Heaters Shaping die Molten plastic Extrudate Tubing and pipes Sheet and film Structural parts
Transcribed Image Text:For the process shown in the schematic below, which of the statements is/are incorrect? Feed hopper Feed hopper Mold cavity Mold Nozzle M Spreader XXXX Heating chamber O b. Ram Hydraulic pressure Which statement is incorrect regarding the mechanical characteristics of polymers? O C. Plastic pellets 50 Turning screw a. Elongation at break is typically greater for polymers than metals b. Metals typically have higher tensile strength but lower elastic modulus than polymers O C. The elastic modulus of semi-crystalline polymers rises as chain entanglement decreases O d. Decreasing the temperature results in increased brittleness in polymers Oe. Amorphous and semi-crystalline polymers both become brittle at lower temperatures Of. Polymers are similar to metals i.e., they can also exhibit both ductile and brittle fracture Select one: O a. The region around B experiences mainly compressive strain Consider a defect in a crystalline lattice as shown below. Which of the following statements is true? B Barrel Select one or more: O a. To release the part, the process typically involves the mould sections opening and the ejector pins pushing the object out of the mould O b. The process can only work with thermoplastics and not with thermosets due to the thermal processing requirements O c. The mould cavity region is usually temperature controlled so that at the point of injection it is heated and then gradually cooled down until the part is released Od. This process is best suited for the large volume production of tubes, bars and beams due to the nature of the extrusion process e. The feedstock has to be molten or liquid monomer, the temperature of which will constantly be held above the melting temperature The region around B experiences mainly shear strain The region around B is unaffected by the impurity O d. The region around B experiences a higher strain on the upper side compared to the lower side Heaters Shaping die Molten plastic Extrudate Tubing and pipes Sheet and film Structural parts
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