Exposure to which of the following is frequently identified as the cause of death for civilian fire fatalities?

Which of the following actions is appropriate when using a helicopter on the scene of an emergency?

A) Always approach a helicopter from the front B) Point a flashlight toward the pilot to show him where to land C) Keep all personnel at least 50 feet from the helicopter D) Approach the helicopter as soon as it lands

All of the following statements about agglutination are true except

a. Is defined as the aggregation of particulate matter caused by combination with a specific antibody b. Is the visible endpoint of antigen-antibody reactions for blood bank testing c. Is an irreversible reaction between antigen and antibody d. Is thought to be a two-step process