What is the principle of operation for a radar-level transmitter?
A. Buoyancy
B. Ultrasonic
C. Pressure
D. Electromagnetic waves
Answer:D
What is the principle of operation for a radar-level transmitter?
A. Buoyancy B. Ultrasonic C. Pressure D. Electromagnetic waves
Explanation: A radar level transmitter operates based on the principle of electromagnetic waves. The transmitter sends out a radar signal that is reflected back by the liquid surface, and the time taken for the signal to return is used to determine the level.