AA material used between the face of a search unit and the test surface to permit or improve the transmission of ultrasonic vibrations from the search unit to the material being tested is called:

Related MCQs

• Ultrasonic testing of material where the search unit is in direct contact with the material being tested may be:
• An ultrasonic test using a straight beam contact search unit is being conducted through the thickness of a flat part such as a plate. This test should detect:
• AA test method employing two seperate search units on opposite surfaces of the material being tested is called:
• The piezoelectric material in a search unit which vibrates to produce ultrasonic waves is called:
• In ultrasonic testing, a liquid coupling medium between the crystal surface and the part surface is necessary because :
• Sound waves of a frequency beyond the hearing range of the human ear are referred to as ultrasonic waves or vibrations, and the term embraces all vibrational waves of frequency greater than approximately:
• An ultrasonic testing technique in which the transducer element is not parallel to the test surface is called:
• The echo on the cathode ray tube (CRT) which represents the far boundary of the material being tested is called:
• A soft aluminium test piece is to be penetrant tested. The piece has previously been sand blasted to remove tightly adhering soils. What additional surface preparation should be performed?
• The cable that connects the ultrasonic instrument to the search unit is specially designed so that one conductor is centred inside another. The technical name for such a cable is: