Studies have found that the rate of crosslinking of a thermoset material can be increased when both electron beam irradiation and thermal heating are used together. Explain why this is so
What will be an ideal response?
The thermal heating gives the molecules more movement and this movement can make the crosslinking reactions more effective and more rapid because there are more collisions between the molecules and, therefore, more reactive occurrences.
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In a split-system air-to-air heat pump, the coil that absorbs heat in the heating mode is referred to as the _____.
a. outdoor coil b. indoor coil c. heating coil d. heat sink
A 1 kg soil sample has 2 cmolc of Al3+ on the exchange complex. Addition of which of the following would most effectively replace about half of this Al?
A) 2 cmolc Na+ B) 4 cmolc Na+ C) 4 cmolc Ca2+ D) 10 cmolc OH- E) 1 cmolc K+
If you are representing the owner/engineer, and during the bidding phase of a project, a bidder telephones your office calling attention to what the bidder believes to be an error, and makes a request for clarification or correction, you should:
A. check out the reported error while still on the telephone, give the caller the corrected data orally, then send an addenda to everyone e1se . B. deny that an error exists and tell the caller to bid the work as it was specified and make his or her own interpretations. C. take all of the information from the caller, then advise him or her to bid the job as it was originally specified unless an addenda is issued, and that if an error was in fact discovered, it will be corrected by addenda which will be mailed to all bidders. D. try to be as helpful as possible by checking with the original designer; then, if an error is noted, give the caller the correct information, but do not go out of your way to inform others unless they call with the same question.
The only way to eliminate steady-state error after a system disturbance is to add equal amounts of integral and derivative action to a proportional controller
Indicate whether the statement is true or false