Which of the following statements regarding the mechanical-draft cooling tower is correct?
A) Mechanical-draft cooling towers are used only for small-scale installation requiring a few gallons of water per minute.
B) The mechanical-draft cooling tower uses a fan to move air through the tower.
C) The primary means of drawing air though the mechanical-draft cooling tower is the density difference between the air inside and outside the tower.
D) There is only one design for a mechanical-draft cooling tower–the hyperbolic design.
B
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a. trimmers b. tail joists c. purlins d. header joists
What data are required in order to use (a) the gravity model and (b) the Fratar model?
What will be an ideal response?
_____ uses a computer-controlled welding power supply to accurately control the size and shape of the molten weld pool.? ?
A. Metal cored FCAW? B. Modulated current GMAW? C. PAW? D. SAW?
The trapping of the Earth's heat in the atmosphere which is causing global warming is called the _________________________.
Fill in the blank(s) with the appropriate word(s).