UN identification numbers have ___ digits

Which of the following is a flash point variable?

A. Time test is conducted B. Carbon monoxide concentration C. Age of individual performing test D. Atmospheric pressure at time of test

What patients are at high risk for postextubation upper airway obstruction? 1. Those with neuromuscular disorders 2. Those who have had major neck surgery 3. Those with infectious masses or abscesses

a. 2 and 3 only b. 1 and 2 only c. 1 and 3 only d. 1, 2, and 3