Which instrument can be a fire hazard if oxygen builds up under the drapes?
a. Microscope
b. Scissors
c. Cautery
d. Forceps
ANS: C
Care is taken not to permit the use of cautery in an oxygen rich environment. If the oxygen builds up under the drapes it can become combustible.
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Type B blasting agents are constructed of which chemicals?
a. Mixtures of ammonium nitrate or other metallic nitrate. b. Liquid nitrate esters such as nitroglycerin, or a mixture of ingredients with one or more of the following: nitrocellulose, ammonium nitrate, other metallic nitrates, nitro derivatives of organic compounds, or combustible materials such as wood meal and aluminum powder. c. Mixture of either potassium chlorate or sodium chlorate, and potassium perchlorate, sodium perchlorate, or ammonium perchlorate, with a nitro derivative of an organic compound or combustible material such as wood meal, aluminum powder, or a hydrocarbon. d. Mixture of nitro derivatives of organic compounds, hydrocarbons, or aluminum powder with a high proportion of ammonium nitrate or other oxidizer, some or all of which is dissolved in an aqueous solution.
What is the most common identified cause of community-acquired pneumonia?
a. Haemophilus influenzae b. Legionella pneumophila c. Staphylococcus aureus d. Streptococcus pneumoniae