A HEPA filter must be able to capture 99.7% of all particulate matter that is at least __________ microns in size.
A. .1
B. .2
C. .3
D. .4
Answer: C
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?Interior automotive parts require ____ to provide resistance to high temperatures and intense sunlight.
A. ?flame retardants B. ?heat stabilizers C. ?antioxidants D. ?plasticizers
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The following are characteristics of a water molecule
A) The H to O to H angle is approximately 90°C. B) It is held in soils by adhesion but not adsorption. C) The two H atoms are on diametrically opposite ends of the molecule. D) It has a positive and a negative side. E) It is attracted to surfaces with negative but not positive charges.
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When using explosives, the specific precautions to be taken to prevent accidental discharges: