Which is the most common category of notification appliances?

Which of the following senses should a paramedic use to recognize hazards at the scene of an emergency?

A) Smell B) Hearing C) Sight D) All of the above

With digital imaging systems, the primary factors affecting final image contrast are the

a. window level and brightness. b. histogram and look-up-table (LUT). c. EI numbers and grid ratio. d. kVp and mAs.