In Table XW0, a fourth-character value of 4 denotes _____

Which of the following gases is used to decrease the work of breathing associated with severe airway obstruction?

a. Nitric oxide c. Helium-oxygen mixture b. Nitrous oxide d. Carbon diox-ide–oxygen mixture

Whenever a device has become obsolete, the Security Office must

a. check the item off the list of equipment to maintain in the facility. b. verify that the facility does not need the equipment any more before selling it. c. log the date of disposal and the amount of its depreciation. d. record when and how it is disposed of and that all data was deleted from the device.