Which of the following mean mass aerodynamic diameter (MMAD) aerosol suspensions is pro-duced by an ultrasonic nebulizer operated at 1.25 MHz?
a. 1 to 2 µm
b. 6 to 10 µm
c. 4 to 6 µm
d. Less than 1 µm
ANS: C
A nebulizer operating at 1.25 MHz produces an aerosol with an MMAD of between 4 and 6 µm.
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