The last ________ digits following a hyphen of the ZIP code identify the block of the street where the address is located.
A. two
B. three
C. four
D. five
Answer: C
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Which of the following is NOT one of the common access problems found at construction and demolition sites?
A. Presence of fire extinguishers at site B. Ditches dug across temporary roadways C. Roadway not maintained in serviceable condition D. Access to fire department water supplies not maintained
Before administering a helium-O2 mixture to a patient with large airway obstruction, what should you do?
a. Analyze the helium concentration of the mixture. b. Heat the cylinder to ensure complete mix-ing of contents. c. Analyze the O2 concentration of the mix-ture. d. Roll the cylinder to ensure complete mix-ing of contents.
Which of the following ventilator conditions appear to be the most important mechanism for ventilator-induced lung injury?
A. excessive lung volumes and alveolar overdistention B. low lung volumes and no PEEP C. increased inspiratory time and increased respiratory rate D. repeated cyclic opening and closing of alveoli at low lung volumes
Which structure within the respiratory tract is the proximal and superior?
a. bronchus b. diaphragm c. larynx d. trachea