A reason for using a dual element search unit is:

Related MCQs

• 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:
• An advantage of a dual crystal search unit is that:
• A disadvantage of using natural quartz crystals in a search unit is that:
• 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:
• The piezoelectric material in a search unit which vibrates to produce ultrasonic waves is called:
• 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:
• In immersion testing, the position of the search unit is often varied to transmit sound into the test part at various angles to the front surface. Such a procedure is referred to as:
• A 25 MHz search unit would most likely be used during:
• 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:
• In immersion testing, verification that the search unit is normal to a flat entry surface is indicated by: