Exam Question
Write short notes on the following:
(a) ultrasonic testing (8)
(b) shaft earthing device (8)
Class 4 (4th Engineer)
MEKG
📅 Jan 2025
Reference Answer
### (a) Ultrasonic Testing (UT)
#### 1. Principle of Operation
Ultrasonic Testing (UT) is a Non-Destructive Testing (NDT) method that utilizes high-frequency sound waves (typically 0.5 to 15 MHz) to detect internal flaws, measure material thickness, and characterize material properties. The core principle involves transmitting an ultrasonic pulse into a material and analyzing the returned echo or the transmitted energy.
- **Transducer**: A probe containing a piezoelectric crystal converts electrical energy into mechanical vibrations (ultrasonic waves) and vice-versa.
#### 1. Principle of Operation
Ultrasonic Testing (UT) is a Non-Destructive Testing (NDT) method that utilizes high-frequency sound waves (typically 0.5 to 15 MHz) to detect internal flaws, measure material thickness, and characterize material properties. The core principle involves transmitting an ultrasonic pulse into a material and analyzing the returned echo or the transmitted energy.
- **Transducer**: A probe containing a piezoelectric crystal converts electrical energy into mechanical vibrations (ultrasonic waves) and vice-versa.
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