In a basic ultrasonic test pattern (A scan) for contact testing, the initial pulse (assume no sweep delay is used):

Related MCQs

• 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:
• In a basic pulse-echo ultrasonic instrument, the component that produces the time base line is called a:
• Ultrasonic testing of material where the search unit is in direct contact with the material being tested may be:
• The portion of a test piece which is represented by the CRT screen area from zero to the rightmost edge of the initial pulse is called:
• An ultrasonic instrument control which is used to expand or contract the horizontal base line of an A scan display is called:
• An ultrasonic testing technique in which the transducer element is not parallel to the test surface is called:
• An ultrasonic instrument control which allows moving an A scan display to the left or right without changing the distance between any echoes displayed is called:
• A 7.6 cm (3 inches) thick test specimen is radiographed with a source having size of 1.3 cm (1/2 inch), the film is placed in contact with the test specimen. The source to film distance is 40.6 cm (16 inches).The geometric unsharpness obtained is:
• Typical frequencies which might be used to perform ultrasonic testing of concrete are:
• Typical frequencies which might be used to perform ultrasonic testing of ferrous and non-ferrous welds are: