What is the basic principle of operation of a magnetic level gauge?
A. The principle of buoyancy
B. The principle of reflection
C. The principle of magnetic coupling
D. The principle of ultrasonic waves
Answer:C
What is the basic principle of operation of a magnetic level gauge?
A. The principle of buoyancy B. The principle of reflection C. The principle of magnetic coupling D. The principle of ultrasonic waves
Explanation: Magnetic level gauges work on the principle of magnetic coupling between a float and a magnetized indicator. The movement of the float due to liquid level changes causes the magnetic field to change, which is detected by the indicator.