Explain why increasing the line sizing affects water hammer.
What will be an ideal response?
A larger line size reduces the velocity and, therefore, reduces or eliminates water hammer.
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The pressure relief valve on a 134a A/C system will open at about ________ PSI.
A) 175 to 300 B) 400 C) 500 to 600 D) 300
The chimney sections are slipped together and fastened with sheet metal screws, and then the chimney is framed with wood and covered with the specified siding and trim; this chimney enclosure is called ______.
A. chase B. flue C. damper D. smoke shelf
List three reasons an arcing incident may occur._______________________________________________________________________________________________________________________________________________________________________________________________________________
What will be an ideal response?
Which port is used as input in the 74LS244 circuit?
A) port 3 B) port 0 C) port 2 D) port 1