A type of cast iron which has ultrasonic properties similar to steel is:

Related MCQs

• What type of search unit allows the greatest resolving power with standard ultrasonic testing equipment?
• When a vertical indication has reached the maximum signal height which can be displayed or viewed on the CRT of an ultrasonic instrument, the indication is said to have reached its:
• A good Cobalt-60 shot is made on a 7.6 cm (3 inches) steel casting using an exposure time of 10 minutes and a source-to-film distance of 91.5 (36 inches). If it is necessary to change the source-to-film distance to 61 cm (24 inches), what exposure time would produce a similar radiograph if all other conditions remain the same?
• Radiographic equivalence factors for Inconel and 304 stainless steel are 1.4 and 1.0 respectively. What is the approximate equivalent thickness of Inconel requiring the same exposure as 1.27 cm (½ inch) thickness of 304 stainless steel?
• The approximate radiographic equivalence factors for steel and copper at 220 kV are 1.0 and 1.4 respectively. If it is desirable to radiograph a 1.27 cm (0.5 inch) piece of copper, what thickness of steel would require about the same exposure characteristics?
• An ultrasonic display which shows a cross section of the test piece and any flaws which are found are called:
• The piezoelectric material in a search unit which vibrates to produce ultrasonic waves is called:
• Which of the following can be a source of spurious ultrasonic signals?
• Which of the following circuits converts electrical energy to ultrasonic energy?
• Which of the following circuits provide current to operate the ultrasonic instrument?