Which of the following materials of the same alloy is most likely to produce the greatest amount of sound attenuation over a given distance?

Related MCQs

• Which of the following frequencies would probably result in the greatest ultrasonic attenuation losses?
• 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?
• In general, which of the following materials would have the least ultrasonic attenuation?
• When comparing discontinuity echoes to equivalent flat bottom hole echoes in materials with similar impedance, surface finish and attenuation:
• If 37 GBq (1 Ci), of Ir-92 produces dose rate of 0.59 Gy/h (59000 mR/h) at 30.5 cm (1 foot), how much dose in Gy/h (R/h) will 370 GBq (10 Ci) produce at the same distance?
• In steel, the velocity of sound is greatest in which of the following modes of vibration?
• Which of the following cast materials could most likely be successfully ultrasonically tested?
• Of the piezoelectric materials listed below, the most efficient sound transmitter is:
• A radiographic exposure with 3700 GBq (100 Ci) source of Ir-192 using source to film distance of 60 cm results in a radiation intensity of 0.12 Gy/h (11.8 R/h) and a radiographic density of 2.5. The intensity of radiation needed to obtain the same density when the source to film distance is changed to120 cm is:
• Which of the following methods might be used to reduce attenuation losses in an ultrasonic test?