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2. At the end of this 25’ section of ductwork, there is a contraction fitting. The...

2. At the end of this 25’ section of ductwork, there is a contraction fitting. The fitting is connecting the 18” diameter duct to a 12” diameter duct.

a) Assuming that this is a tapered contraction fitting, what is the outlet static pressure from this fitting if the inlet static pressure is –2.5 “ w.g. and the taper angle is 20 degrees? Hint: You should have already found VP1 in question number 1.

b) Assuming that this is an abrupt contraction fitting, what is the outlet static pressure from this fitting if the inlet static pressure is –2.5 “w.g.?

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