Non-Destructive Testing (NDT) Practice Test

What does the acronym FPADSCRyN represent in ultrasonic testing?

1. Frequency and properties of sound wave

2. Types of transducers used

3. Methods of inspection

4. Standards for quality assurance

The correct answer is: Frequency and properties of sound wave

The acronym FPADSCRyN in ultrasonic testing stands for "Frequency, Pulse Duration, Amplitude, Duty Cycle, Sensitivity, Coupling, and Reflection or Transmission." Each component plays a critical role in the effectiveness and reliability of ultrasonic testing methods. The term "Frequency" refers to the number of cycles a sound wave completes in one second, which is fundamental in determining how well the ultrasonic waves will penetrate and interact with the material being tested. Higher frequencies are typically used for detecting smaller flaws but have less penetration depth, while lower frequencies offer greater penetration depths but may miss smaller flaws. "Pulse Duration" relates to the length of time that the transducer emits ultrasonic energy, impacting the resolution and ability to distinguish between closely spaced flaws. The “Amplitude” of the ultrasonic wave affects the signal strength and the ability to detect flaws. A stronger wave may yield better detection capabilities, especially in complex materials. “Duty Cycle” is the ratio of the time the ultrasonic pulse is actively transmitted compared to the total cycle time, which influences the heating of the transducer and overall performance. “Sensitivity” involves the ability to detect faint echoes of flaws, which can fluctuate based on frequency and other factors. “Coupling” is essential for ensuring the ultrasonic