List three considerations that must be taken into account in the placement, number and size of the vent holes in a female mold used for fundamental (straight) vacuum forming
What will be an ideal response?
The holes should be as large as possible to allow fast application of the vacuum without showing through onto the surface of the plastic. Soft plastics or those that are heated to high temperatures will probably require smaller holes. The holes should be placed as far apart as is practical while assuring that all areas of the plastic sheet are drawn tightly against the cavity walls. Holes should be placed in any corner or other area where webbing or bridging might be a problem.
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The function of an 8x8 permutator is given by the following table:
The following message is to be sent through the air:
I AM DONE WITH MY FINALS AND NOW CAN TAKE A
BREAK OR A VACATION.
Find the message going through the air if
(a) An 8-way interleaving is done before using the permutator.
(b) An 8-way interleaving is done after using a permutator and before it is transmitted.
In isometric projection, holes drawn on the principal surface appear as circles.
Answer the following statement true (T) or false (F)
If the drain for a 90% efficient furnace and the drain for the air conditioning coil are run with a common drain, the drain should be sized
A) For the furnace drain, which is larger B) To handle the combined condensate output of the air conditioner and the furnace C) To match the cross section area of the combined drains D) For the air conditioning drain which is larger
In CAD, alternative shapes and sizes can be built into a part, sometimes called ____, and the designer can look at and analyze many "what if" scenarios.
A. analogies B. configurations C. sketches D. synectics