To avoid interfering surface waves, low frequencies should only be used on:

Related MCQs

• Which of the following conditions would be most likely to cause strong, interfering surface waves?
• Sound waves which travel on the surface of a solid in a manner similar to waves on a water surface are called:
• Sound waves of a frequency beyond the hearing range of the human ear are referred to as ultrasonic waves or vibrations, and the term embraces all vibrational waves of frequency greater than approximately:
• The velocity of surface waves is approximately shear waves in the same material.
• The depth of penetration of surface waves is approximately:
• When a probe is coupled to a solid, strong surface waves may be produced:
• When variations are noticed in the front surface reflection, the test piece should be inspected for possible near surface discontinuities by:
• The only sound waves which travel in liquids are:
• 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: