Which type of Humidifier rapidly vibrates waster to create a fog or mist?

Which type of Humidifier rapidly vibrates waster to create a fog or mist?
A. Infrared Humidifier
B. Water Canister Humidifier
C. Steam Canister Humidifier
D. Ultrasonic Humidifier

Download Printable PDF. VALID exam to help you PASS.