Question

Choose the applications of ultrasonic sound:

• A. Electrocardiography
• B. Ultrasonography
• C. Cleaning hard-to-reach parts such as spiral tubes etc.
• D. SONAR

Answer 1

Answer: (B), (C), (D)

The correct options are
B

Ultrasonography

C

Cleaning hard-to-reach parts such as spiral tubes etc.

D

SONAR

Electrocardiography is a technique that uses electrodes placed on the skin to record the electrical activity of the heart.

Ultrasonic waves are made to reflect from different parts of the human body to form the image of organs such as the heart, liver, kidney etc. This process is called ultrasonography.

SONAR uses ultrasonic waves to find the distance and direction of the objects submerged under water. Also, sonar is used to measure the depth of the water.

Ultrasonic waves are also used to clean hard-to-reach parts, because of high frequency, dirt dust and grease particles are detached from the objects.