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Identify and state the historical significance ofSamuel F. B. Morse.
What will be an ideal response?
Created a telegraph that innovated business communication.
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When prospective contractors cannot be relatively certain of what they will be expected to perform, or where they are uncertain as to the techniques needed to accomplish contractual requirements, what type of contract are they likely to prefer?
What will be an ideal response?
?The spool valve's movement is controlled by:
A. ?Hydraulic pressure B. ?Spring pressure C. ?Mechanical linkage D. ?All of the above
What is one of the hallmarks of professionally trained designers?
a. neatness c. computer design graphics b. distinctive style of hand lettering d. use of guidelines
Why is 24 volts used for the control circuits in residential and light commercial heating and air-conditioning systems?
What will be an ideal response?