CWB MOD 19 ULTRASONIC INSPECTION correctly answered rated A+ 2023/2024

CWB MOD 19 ULTRASONIC INSPECTIONExercise Questions - Section 1 & 2 1. The upper limit of human hearing is approximately a) 20 Hz b) 20 kHz c)20 MHz b) 20 kHz Exercise Questions - Section 1 & 2 2. A typical frequency used for ultrasonic testing of welds is: a) 2.25MHz b) 2.25kHz c) 2.25 Hz a) 2.25MHz Brainpower Read More Exercise Questions - Section 1 & 2 3. If an ultrasonic wave in a block of steel has a wavelength of 1.3 mm and travels at a velocity of 5.85 x 10 power of 3 m/s. What is the frequency? 4.5MHz Exercise Questions - Section 1 & 2 4. Do transverse waves in a solid travel faster or slower than longitudinal waves? slower Exercise Questions - Section 1 & 2 5. True or False The energy carried by a wave is proportional to the square of the amplitude True We have an expert-written solution to this problem! Exercise Questions - Section 1 & 2 6. If the amplitude of a wave is reduced to 25%, what is the corresponding drop in dB? (Hint: you can figure it out from the information in section 2.5 but you could also use logarithm tables or a calculator) 12dB Exercise Questions - Section 1 & 2 7. The decrease in energy of an ultrasonic wave as it travels through a material is known as: a) amplitude b) amplification c) attenuation c) attenuation Exercise Questions - Section 1 & 2 8. Piezoelectric crystals can: a) change mechanical pulses into electrical pulses b) change electrical pulses into mechanical pulses c) both (a) and (b) c) both (a) and (b)