A fan produces a flow of 3,400 CFM. What area duct will give an air speed of 350 ft/min in the duct? Round answer to the nearer hundredth square foot.
Fill in the blank(s) with the appropriate word(s).
9.71 sq ft
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The supratidal and intertidal areas are below the water level
Indicate whether the statement is true or false
Traditional methods of capacity control for centrifugal compressors include
A) Adjustable pitch impellers B) Variable inlet vanes and motor speed control C) Discharge outlet vanes D) Cylinder unloading
The advantage of the backward-curved centrifugal fan over the forward-curved centrifugal fan is that:
A) Backward-curved fans operate at lower RPM. B) Backward-curved centrifugal fans are well suited for small airflow quantities. C) Backward-curved fans are normally quieter in operation. D) Backward-curved fans are non-overloading.
An instrument that can be used to determine the relative humidity of air is the ____________________.
Fill in the blank(s) with the appropriate word(s).