QUIZ) ASNT L3 UT 1

1. Which of the following is not basic information available through ultrasonic examination

A. The location of the discontinuity in the weld cross section can be estimated

B. The orientation, and to some degree, the shape of the discontinuity can be determined by comparing

signal size when tested from different directions

C. The returned signal amplitude is a measure of the height of the discontinuity

D. Discontinuity length is determined by search unit traver in the lengthwise direction

2. Which of the following is a significant advantage of contact automated scanning systems with

computer aided data acquistion?

A. Flaw acceptance or rejection is performed by computer only

B. A fixture containing multiple transducers may be used to scan and aquir test data simultaneously

C. Scanning speeds can be increased beyond that capable of immersion testing

D. Human error in acquiring and evaluating data is essentially eliminated

3. An automatic scanner is set to scan at 50cm/sec with a pulse repetition rate of 500 pulse per second,

and the water path is 25cm over an aluminum plate. A flaw is located 1cm below the surface of the

plate. How fat will the transducer move between pulse?

A. 0.39 CM

B. 0.17 CM

C. 0.43 CM

D. 0.10 CM

4. When ultrasonically testing composite materials for disbonds at a bond line

A. The bondline interface signal is monitored

B. Transducer near field must be caculated

C. Only the back wall echo signal is monitored

D. The adhesive thickness must be known

5. A procedure allows ultrasonic testing using an acoustically similar piece of material as a reference

block. If the material to be inspect is a titanium alloy, the reference block would be required to

A. have approximately the same attenuation and velocity as the titanium alloy

B. have approximately the same attenuation and acoustic impedance as the titanium alloy

C. have approximately the same velocity and density as the titanium alloy

D. be the same alloy of titanium

6. One of the difficulties associated with ultrasonic testing of ceramics using focused probes is

A. the need to utilize low frequencies to overcome attenuation

B. the porous nature of the material

C. density variations within the material

D. the high refraction index of the typical ceramic, limiting the focal depth to a few millimeters

7. When a sound beam from a flat faced transducer travels from a liquid into a metal and normal to the

metal surface, the sound beam inside the metal will be

A. convergent if the metal surface is flat

B. convergent if the metal surface is convex

C. divergent if the metal surface is convex

D. divergent if the metal surface is concave

8. What technique is a key method of obtaining velocity and attenuation?

A. Dynamic resonance

B. Damping measurement

C. Pulse echo

D. sonic analysis

9. Sound velocity changes

A. with attenuation in a material

B. with a change of frequency

C. when traveling from one material to a different material

D. in direct proportion with material density

10. The primary application of a delay tip transducer is

A. flaw detection

B. thickness measurement

C. the inspection of large areas

D. immersion inspection

11. A primary use for ultrasonic attenuation measurement is the

A. determination of microstructural differences

B. determination of concrete thickness

C. detection of flaws

D. determination of electrical conductivity

12. Dispersion is primarily affected by

A. transducer size and type of crystal

B. calibration reference level

C. wave length and frequency

D. material type and defect reflection factors

13. If high speed testing is of major importance, which of the following would be most appropriate

ultrasonic test system?

A. Immersion

B. Base contact

C. automated contact

D. AII systems can be effectively operated

14. Discontinuities in most wrought products tend to be oriented

A. transverse to grain flow

B. perpendicular to the inspection surface

C. in the direction of grain flow

D. in a random arrangement

15. At an incident angle of 10 degrees, the longitudinal wave is transmitted from water into a laminate of

silver (near side) and steel, what is the angle of the refracted longitudinal wave in the steel?

A. 62 degrees

B. 23 degrees

C. 42 degrees

D. 51 degrees

16. The amplifier range over which the unsaturated signal response increases in amplitude in proportion

to the discontinuity surface area is the

A. sensitivity range

B. linearity range

C. selectivity range

D. resolution range

17. Which of the following characteristics would improve the near surface resolution of a transducer?

A. High Band pass filter

B. Low frequency

C. High damping

D. Long pulse duration

18. By the immersion, longitudinal wave technique, inspecting a flat, 6-inch thick, Austenitic Stainless

Steel forging using a 5 Mhz, 3/4-inch diameter, flat transducer, what is the approximate minimum

water path distance to inspect the full thickness of the part?

A. 1 inches

B. 2 inches

C. 3 inches

D. 5 inches

19. Which of the following is not an advantage to remote monitoring of ultrasonic scanning?

A. Observation and verification of system performance in hazardous environment and restricted to personnel

B. Assurance of complete scan coverage

C. Ability to record or capture the examination

D. An increase in the propability of detection

20. Which of the following statements is the most accurate

A. Once a system has been calibrated against a known standard, changing only the transducer to one

of the same type will not necessitate recalibration

B. Rotating a transducer 90 degrees around its central axis might change the system response enough

to necessitate recalibration of the system

C. changing the transducers cable from an 8" to 10" length will have little affect on calibration

D. Due to the fast response of the electronics, it is permissible to calibration a dynamic system in a static mode

 

 

Answer

1	2	3	4	5	6	7	8	9	10
C	B	D	D	D	D	C	C	C	B
11	12	13	14	15	16	17	18	19	20
A	A	C	C	C	B	C	B	A	B