Friction due to air rubbing the walls of the ductwork can be eliminated.
Correct Answer:
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Q4: Oversized duct systems cost more to fabricate
Q5: The atmosphere exerts a pressure of _
Q6: The forced-air system is different from a
Q7: Duct systems can be plenum, extended plenum,
Q8: The main drawback of the extended plenum
Q10: The reason for using a reducing plenum
Q11: The duct pressure equals the velocity pressure
Q12: The _ provides the pressure difference needed
Q13: A(n) _ can be connected to measure
Q14: Canvas collars are generally made of canvas
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