RT STUDY Flashcards
A basic requirement for pulse-echo ultrasonic testing is that?
The same transducer acts both the transmitter and the receiver
To vary or change the wavelength of sound being used to test a part, you would change the?
Sound wave frequency
Contact testing of thin plates for subsurface discontinuities would most likely be performed with?. L
Lamb waves
Beam spread begins at the?
End of the Fresnel zone
Why a straight beam test is usually performed prior to angle beam testing of a butt weld?
To locate possible laminations in the base metal
The strongest intensity of the sound beam?
Is along its central axis
When iron and scrap steel are heated in a furnace along with lime and various fluxes, the resulting product is called?
Carbon steel
By changing the transducer, the ultrasonic testing technician could change the testing?
Frequency
One megahertz is best expressed by which of the following below?
1 x 10⁶ cycles/second
Snell’s law can be used to calculate angular relationships and ________.
Pulse length
During forging operations, ___________ can occur if the stresses exceed the limit of the material being processed?
Bursts
According to SNT-TC-1A, a level III who is certified in a specific method?
Should have knowledge of other NDT methods
The receiver/amplifier circuit serves to amplify the inbound pulses of energy from the?
Transducer
