UT Ch5

In a given specification, a technician should look for which of the following details?

a) address of the inspection agency
b) the type of test required
c) make and details of the transport arrangement
d) details of lodging and boarding arrangement
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In a given specification, a technician should look for which of the following details?

a) address of the inspection agency
b) the type of test required
c) make and details of the transport arrangement
d) details of lodging and boarding arrangement
b) the type of test required
In contact testing, the transducer is:

a) in direct contact with the part surface
b) in contact with plastic wedge or membrane
c) in contact with the part surface through a thin film of couplant
d) immersed in a bath of couplant
c) in contact with the part surface through a thin film of couplant
In pulse echo contact testing, placement of the receiver is:

a) on the opposite surface/side of part
b) is not so important
c) on the same side of the part, from where energy is transmitted
d) a composite depending on the part configuration
c) on the same side of the part, from where energy is transmitted
In a double crystal transducer, the frequency and size of both the transmitting and receiving crystals must be essentially:

a) different
b) the same
c) dependent on the job specification
d) the same regarding size bit the frequency should be different
...
The conventional angle beam technique is used to transmit sound waves into the test object:

a) at a predetermined angle to the test surface
b) at an angle normal to the test surface
c) at a 0 degree to the test surface
d) simultaneously at several angles to the test surface
a) at a predetermined angle to the test surface
Surface waves:

a) are generated at incident angles below the first critical angle
b) can be used for testing rough and uneven surfaces
c) normally travel up to one wavelength in depth from the surface
d) are also called lamb waves
c) normally travel up to one wavelength in depth from the surface
Surface waves:

a) travel at the same speed as longitudinal waves
b) travel only in solids
c) can exist in solids, liquids, and gases
d) travel only a short distance before being completely attenuated
b) travel only in solids
In immersion testing:

a) a waterproof transducer is used
b) the ultrasonic beam is transmitted into material through a plastic column
c) the technician must take the test unit underwater
d) the test instrument must be waterproof
a) a waterproof transducer is used
In the immersion technique, the type of wave generated depends on the:

a) type of couplant
b) probe focusing
c) probe crystal
d) probe angulation
d) probe angulation
The bubbler technique is a variation of the:

a) contact method
b) through transmission technique
c) surface wave technique
d) immersion technique
d) immersion technique
The bubbler technique is typically used when the size of the test object is: a) very large so that it cannot be accommodated in an immersion tank, such as with plates and sheets b) very irregular so that it does not make proper contact with a regular contact transducer c) very small d) 20x the probe diametera) very large so that it cannot be accommodated in an immersion tank, such as with plates and sheetsIn the use of the bubbler technique, the sound beam is projected into the material though a column of flowing water and is directed perpendicular to the test surface to produce: a) surface waviness b) far field effects c) greater beam spread d) longitudinal wavesd) longitudinal wavesWhen using the bubbler technique, the incident beam can be adjusted at an angle to the surface to produce: a) shear waves b) standing waves c) longitudinal waves d) surface wavesa) shear wavesThe wheel transducer technique is a variant of the immersion method in that the sound beam is projected through a liquid-filled tire into the test object. The flexible tire helps to adjust the: a) near field of the transducer b) surface contour c) far field d) beam spreadb) surface contourWhat industry most commonly makes application of the wheel transducer technique? a) aircraft b) oil refining c) railroad d) pipelinec) railroadThe through transmission technique is primarily used to: a) measure thickness b) detect discontiuities c) detect the backwall surface d) verify false indicationsb) detect discontiuitiesContact testing of plates for subsurface discontinuities would most likely be performed with: a) longitudinal waves b) shear waves c) surface waves d) lamb wavesd) lamb wavesA basic requirement for pulse echo ultrasonic testing is that: a) the instrument display shows the amplitude of the received signal and the locations of the transducers on the test surface b) the instrument can display a useful amplitude range of about 30db under good conditions c) the pulsing and receiving transducer are of the same type of material d) the same transducer acts as both transmitter and recieverd) the same transducer acts as both transmitter and reciever