QUIZ) ASNT L3 UT 2

21. In the below, how much surface distance from point B would be necessary to place the exit point of

the transducer to obtain the 8/8 normal position at point B be using a 60 degree angle?

A. 4.92"

B. 5.92"

C. 6.92"

D. 7.02"

22. The best way to determine the weld centerline on installed piping with an inaccessible inside diameter

(I.D), is to

A. check the as-design drawings

B. review the detailed weld procedures

C. generate a weld profile from ultrasonic data

D. the I.D must be accessible to determine the true weld centerline

23. Which ultrasonic methods can be used for testing bonded joints if only one surface of a bonded joint

is accessible for inspection: (1) Resonance method: (2) Through-transmission method: (3)Pulse-echo

method: (4)Multiple reflection method: (5)Acoustic impedance method?

A. Method 1,3,4

B. Method 2,3,4,5

C. Method 1,3,4,5

D. Method 1,3,5

24. Ultrasonic procedures developed to address casting fabrication may include

A. an examination for secondary processing defects

B. an examination for primary processing defects

C. a test for internal burst as a result of the riser(feeder) removal

D. heat affected zone cracking

25. Low amplitude signal that do not travel along the baseline that change in amplitude with movement

of the transducer is an indication of

A. porosity

B. microfissuring

C. grain structure

D. crack boundaries

26. Object appraisal may include statistical analysis applied to the acceptance decision in ultrasonic testing.

The study of ultrasonic testing measurement reveals that there are important levels of imprecision and

inaccuracy. What factor will not support reduction or stabilization of these variables?

A. Testing procedures

B. Monitoring of test systems adjustments with control charts

C. A constant link between destructive and nondestructive testing

D. Modification of the maximum permissible discontinuity size to account for ingerent test measurement

maccuracy

27. To prevent the appearance of the second front surface indication before the first back reflection when

inspecting aluminum, by the immersion method(water used as a couplant), it is necessary to have a

minimum of at least one inch of water for every

A. two inches of aluminum

B. four inches of aluminum

C. six inches of aluminum

D. eight inches of aluminum

28. Area/amplitude and distance/amplitude response curves are greatly affected by

A. the horizontal and vertical linearity of the test instrument

B. the material type tested

C. the test angle and frequency

D. the reflection coefficient of the test block

29. An incident logitudinal wave, transmitted at an angle 4 degrees less than the first critical angles, will generate

A. longitudinal and shear waves

B. longitudinal and surface waves

C. longitudinal waves only

D. transverse waves only

30. If a #2 hole on a area amplitude block requires a reference level of 24dB to bring the single to 70

percent screen height, what would a #4 hole require?

A. 6dB

B. 12dB

C. 18dB

D. 24dB

31. Crack tip signals would most easily be detected with a 45 degree shear wave in which of the following

crack types, found in pipe weld?

A. Multiple cracks in random directions

B. A signal crack parallel to the I.D surface

C. A signal crack normal to the I.D surface

D. A lamellar tear

32. When using an automatic gating technique in doing a pulse echo scan of a part, the outline shape of

the part might not show on the trace

A. if the gate is in a negative mode since the loss of a signal will not record

B. because of edge effect

C. if the gate is not set wide enough

D. it the gate is lost when front surface is lost at the edge

33. When a transducer is focused, distance from the the face of the transducer to Y。, + point

A. increases

B. decreases

C. is unaffected

D. is the same as the Y1 + point

34. The best couplant for use on an unusually rough surface when good coupling is needed to minimize

background noise and yield the best possible signal-to-noise ratio would be

A. tap water

B. water with a wetting agent

C. a glycerin and water mix

D. wallpaper paste

35. Given a focal length of 2 inches in water and a L wave velocity ratio of two, what is the lens radius of

curvature?

A. 0.5 inches

B. 1.0 inch

C. 2.0 inches

D. 4.0 inches

36. A forging indication which produces many A-scan indications of various amplitudes if indicative of

A. bursts

B. laps

C. a crack

D. shrinkage

37. The velocity at which Lamb waves (symmetrical and as metrical) travel in a plate depends on

A. the surface distance of the part

B. the material type

C. the signal strength in decibels

D. the size of the transducers

38. In what application is it a major advantage to use a digital thickness gage with an A-scan presentation?

A. Performing a lamination check on plate

B. Checking thickness on a structure with complex geometry

C. Looking for pitting type corrosion on the back side of a material

D. Conducting the "SPOT" method of crack tip diffraction

39. A device for controlling the size and direction of the ultrasonic beam is called a

A. collimator

B. wedge

C. mirror

D. DAC

40. During a shear wave weld inspection, a flaw indication is detected, and peaked at reference level

sensitivity, An additional eight(8) decibels must be removed to bring this signal to reference level.

What is the size relationship between the indication signal and the reference signal?

A. The indication signal is 2.25 times larger

B. The indication signal is 2.25 times smaller

C. The indication signal is 2.5 times larger

D. The indication sigal is 3.3 times larger

 

 

 

answer

21	22	23	24	25	26	27	28	29	30
C	C	C	C	C	C	B	A	A	B
31	32	33	34	35	36	37	38	39	40
C	D	B	C	B	A	B	A	B	C