"Recognition granted by a nongovernmental agency that attests that an individual has met the required levels of competency" is the definition of:

How much pleural fluid does a normal healthy adult have in each hemithorax?

a. 5 ml b. 8 ml c. 12 ml d. 16 ml

The required thickness of a secondary barrier is:

1/32nd inch lead 1/16th inch lead 1/8th inch lead 1 inch lead