Questions for Ultrasonic Testing – Specific

Questions for Ultrasonic Testing – Specific

1) Spurious indications might be caused by which of the following?

(a)      Mode conversion from beam spread in a long specimen

(b)       Surface waves generated during straight beam testing

(c)       A test piece with a rough machined surface

(d)       All of the above

2) An ultrasonic test using a straight beam contact search unit is being conducted through the thickness of a flat part such as a plate. This test should detect:

(a)       Laminar-type flaws with major dimensions parallel to the rolled surface

(b)       Transverse-type flaws with major dimensions at right angles to the rolled surface

(c)       Radial flaws with major dimensions along length but radially oriented to the rolled surface

(d)       None of the above

3) In an A scan presentation, the horizontal base line represents the:

(a)       Amount of refracted ultrasonic sound energy

(b)       Distance traveled by the search unit

(c)       Elapsed time or distance

(d)       None of the above

4) Spurious or non-relevant indications might be suspected if:

(a)       Indications are unusually consistent in amplitude and appearance

(b)       There are strong indications in localized areas

(c)       The indications are localized and repeatable

(d)       None of the above

5) Entry surface resolution is a characteristic of an ultrasonic testing system which defines its ability to:

(a)       Detect discontinuities oriented in a direction parallel to the ultrasonic beam

(b)       Detect discontinuities located in the center of a forging containing a fine metallurgical structure

(c)       Detect minute surface scratches

(d)       Detect discontinuities located just beneath the entry surface in the part being tested

6) In immersion testing, verification that the search unit is normal to a flat entry surface is indicated by:

(a)       Maximum reflection from the entry surface

(b)       Proper wavelength

(c)       Maximum amplitude of the initial pulse

(d)       Elimination of water multiples

7) In the same material, shear wave velocity is:

(a)       Approximately 1/2 longitudinal wave velocity

(b)       Approximately twice longitudinal wave velocity

(c)       Approximately 1/4 longitudinal wave velocity

(d)       Approximately four times longitudinal wave velocity

8) The echo on the cathode ray tube (CRT) which represents the far boundary of the material being tested is called:

(a)       Hash

(b)       The initial pulse

(c)       The ‘main bang’

(d)       The back wall echo

9) A standard block which can be used to calibrate an instrument for an angle beam range calibration is:

(a)       Area-amplitude blocks

(b)       Distance-amplitude blocks

(c)       V1/V2 block

(d)       Beam spread block

10) The indication found by probe 90%, how much dB need to drop the indication for 22.5%

(a)       6 dB

(b)       10 dB

(c)       12 dB

(d)       20 dB

11)      In the immersion technique the water path shall be minimum to that comparison to job thickness for steel is:

(a)     ½ t

(b)     ¼ t

(c)     1/8 t

(d)    1t

12) The use of the acoustic barrier in TR probe for:

a) for reduce the cross talk echo

b) for increase penetrating ability

c) both a and b

d) none of the above

13) An advantage of immersion testing is that:

(a)       Large parts are easily inspected

(b)       Most test systems are easily transported in the field

(c)       High test frequencies may be used

(d)       Most test systems are not easily transported in the field

14)      Abnormally large grain size in the test material may be indicated by:

(a)       High levels of baseline noise, or hash

(b)       High amplitude reflections between front and back surface echoes

(c)       High amplitude, spurious echoes which are not repeatable

(d)       Abnormally high back surface echo

15) According to ASNT TC-1A- 2011 renewal of certification shall be:

(a)       3 years

(b)       4 years

(c)       5 years

(d)       None of the above

16) The equipment use for AUTO UT shall have:

(a)       recording data

(b)       x-ray facility

(c)       welding

(d)       none of the above

17) According to the doc ASME Sec V which statement are true:

(a)       Article 2 for UT.

(b)       Article 3 for UT.

(c)       Article 4 for UT.

(d)       all of the above

18) Calibration shall be perform at

(a)       The beginning of each normal inspection shift,

(b)       Every four hours of the running system.

(c)       Whenever there is an equipment operator changeover

(d)     all of the above

19) According to the ASME Sec V which statement are false:

(a)       UT required procedure

(b)       UT not required any procedure

(c)       Procedure have revised if variable change

(d)       All of above

20) Decoupling stand for :

(a)      Lose of operator

(b)      Lose of paper

(c)      lose of coupling

(d)      All of the above

21) In a basic pulse-echo ultrasonic instrument, the component that produces the time base line is called a:

(a)       Sweep circuit

(b)       Receiver

(c)       Pulsar

(d)       Synchronizer

22) Gas discontinuities are reduced to flat discs or other shapes parallel to the surface by:

(a)       Rolling

(b)       Machining

(c)       Casting

(d)       Welding

23) Compared to the echo returned from a smooth reflector, the echo returned from a natural flaw of the same area and orientation is:

(a)     The same

(b)       Greater

(c)       Smaller

(d)       Not related to

24) The 2 mm wide notch in the IIW block is used to:

(a)       Determine beam index point

(b)       Check resolution

(c)       Calibrate angle beam distance

(d)       Check beam angle

25) A primary purpose of a reference standard is:

(a)       To provide a guide for adjusting instrument controls to reveal discontinuities that are considered harmful to the end use of the product

(b)       To give the technician a tool for determining exact discontinuity size

(c)       To provide assurance that all discontinuities smaller than a certain specified reference reflector are capable of being detected by the test

(d)      To provide a standard reflector this exactly simulates natural discontinuities of a critical size

26) Resolution is inversely proportional to:

(a)       Wavelength

(b)       Crystal thickness

(c)       Bandwidth

(d)       Mechanical losses

27) The most important factor required for the proper interpretation of ultrasonic test results is:

(a)       The ultrasonic signal amplitude

(b)       A knowledge of the test specimen material and its construction

(c)       A knowledge of the ultrasonic instruments operating characteristics

(d)       The ultrasonic signal location

28) Most contact testing is performed by which of the following techniques?

(a)       Through transmission

(b)       Pitch-catch

(c)       Pulse-echo

(d)       Continuous wave

29) When conducting an immersion test, the water path distance must be controlled so that:

(a)       Spurious signals are not created by surface waves on the test piece

(b)       The (water path distance)/(diameter) ratio does not result in asymmetric standing waves

(c)       The test piece discontinuity indications appear between the first front and first back surface echoes

(d)       The second front surface echo does not appear on the CRT screen between the first front and first back surface echoes

30) Reflection indications from a weld area being inspection by the angle beam     technique may represent:

(a)       Porosity

(b)       Cracks

(c)       Weld bead

(d)       All of the above