Final answer:
The charge nurse should intervene if the newly licensed nurse uses the diaphragm of the stethoscope to auscultate lung sounds.
Step-by-step explanation:
The charge nurse should intervene if the newly licensed nurse uses the diaphragm of the stethoscope to auscultate lung sounds. The diaphragm of the stethoscope is used to listen to high-pitched sounds such as breath sounds, while the bell is used to listen to low-pitched sounds such as heart sounds. By using the diaphragm to listen to lung sounds, the nurse may not be able to hear important abnormalities in the breath sounds.