Chapter 24

By what mechanism is a person injured when he or she falls from a significant height? Select one: a. Potential energy is converted to kinetic energy; the kinetic energy is then converted into the work of bringing the body to a stop. b. Kinetic energy is converted to potential energy; the potential energy is then converted into the work of bringing the body to a stop. c. Potential energy is created as the person is falling; the potential energy is then converted into kinetic energy upon impact. d. As the person falls, the amount of kinetic energy is converted into work; work is then converted to kinetic energy upon impact.

a. Potential energy is converted to kinetic energy; the kinetic energy is then converted into the work of bringing the body to a stop.

A driver involved in a rollover motor vehicle crash will MOST likely experience serious injuries or death if he or she: Select one: a. is ejected or partially ejected. b. is wearing only a lap belt. c. remains within the vehicle. d. experiences multiple impacts.

a. is ejected or partially ejected.

When caring for an occupant inside a motor vehicle equipped with an air bag that did not deploy upon impact, you should: Select one: a. remember that it could still deploy and seriously injure you. b. realize that the air bag malfunctioned at the time of impact. c. suspect that the patient may have experienced serious injuries. d. recognize that the force of impact was most likely not severe.

a. remember that it could still deploy and seriously injure you.

Which of the following would MOST likely occur as the direct result of the second collision in a motor vehicle crash? Select one: a. Caved-in passenger door b. Deformed steering wheel c. Intrathoracic hemorrhage d. Collapsed dashboard

b. Deformed steering wheel

When a motor vehicle strikes a tree while traveling at 40 mph, the unrestrained occupant: Select one: a. will most likely be thrown over the steering column. b. remains in motion until acted upon by an external force. c. will decelerate at the same rate as the motor vehicle. d. is thrust under the steering column onto the floorboard.

b. remains in motion until acted upon by an external force.

If one or more occupants in the same vehicle are killed in a crash, the EMT should: Select one: a. allow the survivors to refuse transport if they have no obvious injuries. b. suspect that all living occupants experienced the same serious trauma. c. transport the survivors only if they have injuries or complain of pain. d. rapidly assess only the survivors who have experienced obvious trauma.

b. suspect that all living occupants experienced the same serious trauma.

The study of how projectiles affect the body is called: Select one: a. None of the above b. Velocity c. Ballistics d. Kinematics

c. Ballistics

The phenomenon of pressure waves emanating from the bullet, causing damage remote from its path, is known as: Select one: a. Ballistics b. Body cavity dissociation c. Cavitation waves d. Ballistic pressure

c. Cavitation waves

Air bags are designed to: Select one: a. prevent the driver from sustaining head trauma. b. prevent a second collision inside the car. c. be used with or without a shoulder harness. d. decrease the severity of deceleration injuries.

d. decrease the severity of deceleration injuries.

The cervical spine is MOST protected from whiplash-type injuries when the: Select one: a. air bag correctly deploys upon impact. b. patient tenses up at the time of impact. c. rear end of the vehicle is initially struck. d. headrest is appropriately positioned.

d. headrest is appropriately positioned.