Which of the following is a hazard posed by hydrogen peroxide?
a. Concentrated hydrogen peroxide solutions cause combustible materials to burn spontaneously at explosive rates.
b. Hydrogen peroxide solutions having a strength in excess of 20% are highly corrosive.
c. Exposure to the skin causes severe irritation.
d. All of these
D
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The most effective treatment for chronic tension headache focuses on massage applications for the:
A) Upper and lower arms B) Hands and wrists C) Head and face D) Neck and shoulders
When the space above a ceiling is designed as a return-air plenum, which of the following must the inspector ensure?
A. The space above the ceiling is protected by the sprinkler system B. The enclosure for the ceiling is constructed with a 2 hour rating C. Wires, ducts, pipes, and other materials are noncombustible or rated for plenum use D. Adequate provisions are made for venting smoke from a fire to the outside