The eye can be burned on the white or on the retina by ____________________ light.
Fill in the blank(s) with the appropriate word(s).
ultraviolet
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According to quantitative metallography, N1, the average number of grain?boundary intercepts per unit length of a line laid over a microstructure, is directly related to ?Sv, the surface area per unit volume, by the relation:
Air in the hot water circulating system will cause ____.
A. corrosion B. noise C. flow blockage D. all of the above
Why are standing pilot natural draft furnaces no longer manufactured?
A) They cannot provide the minimum 78% AFUE required by DOT B) The standing pilot flame safety devices were deemed too hazardous after several technicians were electrocuted while changing a thermocouple C) The thermocouple flame safety devices they use have not been thoroughly field tested D) Thermocouples proved to be an unreliable technology
The sheave bushing with a flange is called the _____________ type of bushing:
A. Quick Disconnect. B. Taper Lock. C. Split Taper. D. FlangeLess.