When performing a test and balance procedure on a zoned system, correct airflow should first be established:
A) For each zone before balancing the individual branches.
B) For the branch with the highest CFM requirement in each zone.
C) For each branch before balancing the zones.
D) For the branch with the lowest CFM requirement in each zone.
A
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In the late 1980s, a new software algorithm known as ____ increased the utility of solid modeling by making it possible to link the sizes and locations of features on an object to variables that could be input and changed easily.
A. UNIX B. Autodesk C. CAD D. parametric design
Which type of ring joint is most effective in sealing cylinder blow-by gas?
A. straight joint B. angle joint C. barrel joint D. step joint
?Why are fluxing materials used for welding?
A. ?To produce a shinier surface on the weld. B. ?Because some metals are reactive to the atmosphere when heated. C. ?It is a way to help control the heat input to the base plate. D. ?To insure 100% joint penetration on V-grooved joints.
Draw the symbols for a heat exchanger and cooling tower.
Heat exchanger and cooling tower symbols