Describe the three stages of spray gun atomization.
What will be an ideal response?
In a spray gun the paint is distributed in three stages.
In stage one, the finish is released around the fluid needle and passes through the fluid nozzle center. The paint does not start to atomize until it leaves the gun.
In stage two of the paint application process, openings around the outer ring of the fluid nozzle allow air to bombard the liquid, thus breaking down the finish into droplets. As it
passes further outward, the round stream of partially atomized droplets are hit with streams of air from the air cap.
Stage three involves the streams of air coming from the air cap center orifice, which help to further break the finish into smaller atomized droplets. At the same time, larger streams of air from the air cap horns bombard the round spray pattern, changing it into the needed elliptical spray pattern.
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What design are most side impact air bag systems?
What will be an ideal response?
A lightning bolt strikes an airplane with 40 kA for 1.7 ms. How many coulombs of charge are deposited on the plane?
What will be an ideal response?
The subsequent problems deal with frequency response of a second-order measurement system.When the input frequency is the same as the natural frequency of the system and the damping is very small, the output amplitude (kXo) is
A. very large B. 1 C. the same as the input amplitude (Fo) D. very small
The Ø symbol stands for ____________________.
Fill in the blank(s) with the appropriate word(s).