Which of the following statements best describes a propellant?
a. A mixture of an oxidizer and some other arbitrary substance that readily burns.
b. An oxidation-reduction reaction between the components of black-powder when its initiated by a heat from primer.
c. A material such as smokeless powder that defragrates and produces a relatively large volume of gases and vapors.
d. A component of the round that explodes from the mechanism shock it experiences when it hits a target.
C
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Which of the following are safety features incorporated into a medical gas piping system? 1. Zone valves 2. Riser valves 3. Pressure-relief valves 4. In-line oxygen analyzers
a. 3 and 4 c. 1 and 4 b. 1 and 3 d. 1, 2, and 3
Corrosions are burns to the skin due to:
A) fire. B) hot liquids. C) chemicals. D) none of the above.
How should a patient experiencing an angina episode be positioned?
A. supine B. feet elevated C. fetal position D. however they are most comfortable
An unresponsive young adult male patient is not breathing adequately. The best device to use on this patient is a:
A) bag-valve mask. B) nasal cannula. C) simple mask. D) nonrebreather mask.