How many decibels of attenuation correspond to an ultrasonic signal loss of from 100% to 25% on full screen height?

Related MCQs

• A 50 percent decrease in echo amplitude is equal to a loss of how many decibels?
• 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 methods might be used to reduce attenuation losses in an ultrasonic test?
• In general, which of the following materials would have the least ultrasonic attenuation?
• Which of the following frequencies would probably result in the greatest ultrasonic attenuation losses?
• An increase in gain of how many decibels corresponds to a 5:1 increase in flaw echo amplitude?
• An ultrasonic insrument control which is used to adjust the sharpness of the CRT screen display is called:
• Which of the following materials of the same alloy is most likely to produce the greatest amount of sound attenuation over a given distance?
• When comparing discontinuity echoes to equivalent flat bottom hole echoes in materials with similar impedance, surface finish and attenuation:
• Attenuation is made up of: