Ultrasonic Testing Quiz

Ultrasound Quiz 1

Page Page 1 of 2 Ultrasound Quiz 1

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Surface or Rayleigh waves travelling along the surface of relative thick solid material, penetrate to a depth of approximately:

One wavelength Two wavelengths Three wavelengths Infinite wavelengths

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Which of the following could influence the behavior of a transducer?

Electrical construction Material construction Mechanical construction All of the above Which type of screen presentation displays the amount of received ultrasonic energy as a function of time?

A-scan B-scan C-scan All of the above The material of the reference standard used to setup for a flaw inspection:

Can be made from similar material as long as the velocity is the same Should be the same material being inspected Must have the same impedance values as the base material Can only be used once Which of the following waves is only able to travel through a thin section of material?

A longitudinal wave A shear waves A surface wave A lamb wave When a single element transducer is operating in the pulse echo mode, the element:

Can not start receiving reflected signals until the element has stopped ringing from its transmit function  Needs to have a high pulse rate Should be used in the dual mode Can only be made with lithium sulfate In order to have a reasonable chance at detecting a discontinuity, the reflective surface of the discontinuity must have a dimension that is at least as long as ________ wavelength.

One-half  One Two 0ne-quarter 

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The terms used to describe a technique s ability to locate flaws are:

Sensitivity and penetration Space and time Sensitivity and resolution Frequency and size Couplant displaces the__________ and makes it possible to get more sound energy into the test specimen.

Surface rust Surface blemishes Sound energy Air  Beam spread is greater when using:

High frequency transducers Low frequency transducers Angle beam transducers Larger diameter transducers Which type of transducer can be used to scan wide areas when high sensitivity is not required?

Mosaic transducer 

http://ndt-ed.org/EducationResources/CommunityCollege/Ultrasonics/Quiz/UTQuiz2

27/02/2007

Ultrasound Quiz 1

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Single crystal transducer of small diameter  Composite transducer  Paint brush transducer 

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What type of transducer contains two independently operating elements in a single housing?

Crystal mosaic transducer  Dual element transducer  Liquid crystal transducer  Bi polar transducer  DACC stands for:

Distance Amplitude Correction Curve Direct Application Correction Curve Distance Area Correction Calculation Distance Area Computer Controlled The number of cylces per second is the definition of:

Wave speed Frequency Hertz  None of the above Acoustic impedance is identified by the letter:

Z I V P Which of the following would make a good couplant?

Water  Oil Glycerin All of the above A calibration block produced by the International Institute of Welding is called:

An IIW block  A DSC block  A rompus block  A shear wave calibration block  Which type of screen presentation displays a plan-type view of the location and size of the test specimen features?

A-scan B-scan C-scan All of the above

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What is used to support the active element and dampen the transducers characteristics?

Resin Oil Backing material with a similar the impedance of the transducer  Any of the above will work  Which type of transducer will have better resolution?

A slightly damped transducer  A small size and low frequency transducer  A highly damped transducer  All of the above

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http://ndt-ed.org/EducationResources/CommunityCollege/Ultrasonics/Quiz/UTQuiz2

27/02/2007