On apparatus with air brakes, NFPA requires the air pressure to build to a sufficient level to allow vehicle operations within ___ seconds of starting.

You are assessing a patient with an obvious left midshaft femur fracture. The most immediate threat to this patient's well-being is:

A) infection. B) blood loss. C) pain. D) nerve damage.

Conditions that cause a right-to-left shunt are also called ____ heart disease, due to the mixing of oxygenated and deoxygenated blood in the systemic circulation.

A. cyanotic B. aortic C. acyanotic D. hypertrophic