UT Level II - General (3)

Name:

In an A-scan presentation, the horizontal line formed by the uniform and repeated movement of an electron beam across the fluorescent screen of a cathode ray tube is called

a square wave pattern

a sweep line

a marker pattern

none of the above

The angle at which Longitudinal wave travel on the surface or 90⁰, such angle is called as:

Refracted angle

First critical angle

Second critical angle

Mode converted angle

Angle of beam divergence will change if

frequency and size of probe is changed

type and length of cable is changed

gain and pulser voltage is changed

both a & c

If the acoustic impedance of a material is high

ultrasonic waves will be highly attenuated in that material

ultrasonic waves will travel slower in that material

ultrasonic waves will travel fast in that material

both a & b

When damping of the probe is increased, the frequency bandwidth

remains the same

increases

decreases

depends on the equipment

The angle marked on an angle probe is

the angle of the plastic wedge of the probe

second critical angle

first critical angle

angle of refraction in steel

Which of the following cannot be determined by using an IIW(V1) block :

Sound path distance

beam spread

exit point of the transducer ( probe index)

angle of refracted shear wave

To scan the root area of a double sided weld you would employ

70 degree probe

60 degree probe

45 degree tandem technique

a or c

On an A-scan display, the "dead zone," refers to:

the distance contained within the near field

the area outside the beam spread

the distance covered by the front surface pulse width and recovery time

the area between the near field and the far field

The velocity of sound in a material is dependent upon the:

frequency of the wave

wavelength

material properties such as density and elasticity

vibration cycle

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