Performance tests of valve lifters in an automobile engine showed distortion when the material used was 20% glass-reinforced nylon (6/6). Explain why a shift to a higher crystalline polymer was suggested
What will be an ideal response?
The higher crystalline polymer would have more hydrogen bonding sites per unit of polymer length and would, therefore, have more inter-molecular interactions and a higher performance temperature.
You might also like to view...
Referring to the following figure, a work order indicates no A/C cooling. The blower motor is found to operate correctly. Which of the following could be the cause?
A. Blown fuse F12 B. Low A/C refrigerant level (low pressure in system) C. Open circuit A77-GB D. Both B and C
A uniformly distributed load on beam ABC in Figure P6.9 causes it to sag. To counteract this sag, a cable and post are added beneath the beam. The cable is tensioned until the force in the post causes a moment equal in magnitude, but opposite in direction, to the moment in the beam. Determine the forces in the cable and the post, and determine the reactions at A and C.
Employees always work well together as a team just because it’s the right thing to do.