With a higher specific heat than metals, plastics take more energy to reach the melting point than metals do. Question 1 options: TrueFalse Question 2 (3 points) With low thermal conductivity, which metal replacement application would a polymer be best suited for? Question 2 options: Grease-lubricated ejector pins in an injection mold CPU heat sink Incandescent light fixture Vacuum thermos Question 3 (3 points) Polymers may be modified via adding ceramic, metallic, or carbon based fillers to increase thermal conductivity somewhat above unmodified polymers, but well below metals. This modification will make the polymer stiff and brittle. Which metal replacement application would this material be best suited for? Question 3 options: Shock absorber CPU heat sink Cooling manifold for folding solar arrays Assembly robot hydraulic oil lines Question 4 (2 points) What is an efficient way to heat polymer to the melting point? Question 4 options: Heated oil bath Shear heating Resistive heating An oven Question 5 (1 point) Increasing the screw speed in an extruder will increase the heat generated Question 5 options: TrueFalse Question 6 (1 point) Increasing the compression ratio in an extruder will decrease the heat generated Question 6 options: TrueFalse Question 7 (1 point) Increasing the mass flow rate in an extruder will increase the heat generated Question 7 options: TrueFalse Question 8 (1 point) Decreasing the orifice size in an extruder will increase the heat generated Question 8 options: TrueFalse Question 9 (Mandatory) (3 points) A 2 in long nylon engine support has a CTE 2.0x10^-4 in/in*F. When heated from room temperature at 65 degrees to operating temperature at 190 degrees, what is the strain in in/in? Question 9 options: 0.05 0.5 0.0025 0.025 Question 10 (Mandatory) (3 points) 4 2 in long nylon engine support has a CTE 2.0x10^-4 in/in*F. When heated from room temperature at 65 degrees to operating temperature at 190 degrees, what is the change in length in inches? Question 10 options: 0.05 0.025 0.5 0.2525 Question 11 (Mandatory) (3 points) The nylon has a modulus of 1.2*10^6 psi. Based on the strain, what is the stress generated? Question 11 options: 30000 3000 60000 600000 Question 12 (Mandatory) (2 points) The nylon has a yield stress 25,000 psi. Does this part fail? Question 12 options: Yes No