| 1 | In what acoustic frequency range works AE testing usually? |  - NDT Encyclopedia AE| | a) 10 Hz - 100 KHz | | | b) 20 KHz to 1 MHz | | | c) 20 KHz to 100 KHz | |
| | 2 | What generates the acoustic waves? | - NDT Encyclopedia AE| | a) the transducer | | | b) the crack | | |
| | 3 | How many transducers are used to record the acoustic waves | - NDT Encyclopedia AE - sensor| | a) One and more transducers | | | b) Always one transducer | | | c) Four transducers | |
| | 4 | What kind of signal is generated by a crack | - NDT Encyclopedia AE - signal| | a) shock wave signal | | | b) continuous signal | | | c) burst signal | |
| | 5 | What is a guard sensor | - NDT Encyclopedia AE - guard sensor| | a) to discriminate from sources originating outside the area of interest | | | b) to localize the position of an acoustic emission source | | |
| | 6 | What did Hsu-Nielsen invent | - NDT Encyclopedia AE - Hsu-Nielsen| | a) an acoustic emission transducer | | | b) an aid to simulate an acoustic emission event | | | c) a signal filter technique | | pencil lead break. ')">
| | 7 | What is the Kaiser effect | - NDT Encyclopedia AE - Kaiser effect| | a) describes the phenomenon that a material under load emits acoustic waves only after a primary load level is exceeded | | | b) appearance of significant acoustic emission at a load level below the previous maximum applied level | | |
| | 8 | What effect appears first when loading a material | - NDT Encyclopedia AE - Felicity effect| | a) the Kaiser effect | | | b) the Felicity effect | | |
| | 9 | What can AE not be used for | - NDT Encyclopedia AE| | a) defect location | | | b) defect sizing | | |
| | 10 | What is an important wave mode in AE testing | - NDT Encyclopedia AE - Wave velocity| | a) longitudinal wave | | | b) transversal wave | | | c) Lamb wave | |
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