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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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.
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