In ultrasonic testing, a liquid coupling medium between the crystal surface and the part surface is necessary because :

Related MCQs

• During ultrasonic testing by the immersion method, it is frequently necessary to angulate the search unit when a discontinuity is located at an angle in order to:
• The angle formed by an ultrasonic wave as it enters a medium of different velocity than the one from which it came and a line drawn perpendicular to the interface between the two media is called:
• Polished, flat surfaces are undesirable for ultrasonic testing consideration because:
• Entry surface resolution is a characteristic of an ultrasonic testing system which defines its ability to:
• An ultrasonic testing technique in which the transducer element is not parallel to the test surface is called:
• Most commercial ultrasonic testing is accomplished using frequencies between:
• Most commercial ultrasonic testing is performed at frequencies between:
• 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:
• Typical frequencies which might be used to perform ultrasonic testing of ferrous and non-ferrous welds are:
• A common use of ultrasonic testing is: