Which of the following can be a source of spurious ultrasonic signals?

Related MCQs

• During immersion ultrasonic testing of pipe or tubing, spurious echoes may be caused by:
• Spurious indications might be caused by which of the following?
• Spurious indications may be caused by which of the following?
• Spurious or nonrelevant indications might be suspected if:
• 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:
• 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:
• Which of the following is the correct formula to use for calculating geometric unsharpness if F=source size, T=specimen thickness, D=source to object distance and Ug=geometric unsharpness:
• Which of the following circuits converts electrical energy to ultrasonic energy?
• Which of the following circuits provide current to operate the ultrasonic instrument?
• Which of the following transducer materials is the most efficient receiver of ultrasonic energy?