Term
| The temperature at which the material looses piezoelectricity is |
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Definition
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Term
| In the far field of uniform ultrasonic beam, sound intensity is maximum at the beam centerline. |
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Definition
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Term
| As frequency increases in Ultrasonic Testing, the beam spread (divergence angle) of a given diameter crystal. |
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Definition
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Term
| Of the piezoelectric materials listed below, the most efficient sound transmitter is |
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Definition
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Term
| Of the piezoelectric materials listed below, the most efficient sound receiver is |
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Definition
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Term
| Which is the correct formula for near field distance (N)? |
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Definition
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Term
| Which transducer has a bigger beam spread? |
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Definition
| 2.25 MHz, 0.375 inch diameter |
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Term
| The transducer with highest resolution is |
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Definition
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Term
| The most commonly used method of producing shear waves of desired refracted angle (angle beam) in a test part when inspections by the immersion method is |
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Definition
| By adjusting the search unit to the proper angel of incident |
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Term
| The beam spread decreases with |
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Definition
| increasing frequency and increasing crystal diameter |
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Term
| Which of the following signals has a higher Signal-to-Noise ratio? |
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Definition
| The one with the least amount of noise (refer to packet number 11 module 3) |
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Term
| The resolving power of an ultrasonic transducer is directly proportional to its |
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Definition
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Term
| Search units constructed using two crystals with one as transmitter and the other as receiver are called |
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Definition
| Dual "element" transducer |
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Term
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Definition
| Amplitude of the signal produced by the transducer |
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Term
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Definition
| Ability to resolve two closely spaced flaws |
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Term
| Moving a search unit over a test surface either manually or automatically is referred to as |
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Definition
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Term
| An ultrasonic transducer consists of |
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Definition
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Term
| Couplant is used in contact testing to |
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Definition
| improve sound transmission |
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Term
| The transducer with the best near surface resolution is |
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Definition
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Term
| The thinner the piezoelectric crystal |
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Definition
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