Flashcards
Level 1 Ultrasonic Testing Finals
Cards in this deck (32)
- 11. The indication on the instrument display that represnts the far boundry of the material being tested is called: a. hash b. the initial pause c. the main bang d. the back surface reflectiond. the back surface reflection
- 22. The cable that connects the ultrasonic instrument to the tranducer is specially desighned so that one conductor is centered inside another. The technical name for such a cable is: a. BX cable b. conduit c. coaxial cable d. ultrasonic conductor cable-grade 20c. coaxial cable
- 33. The process of comparing an instrument or device with a standard is called: a. angulation b. calibration c. attenuation d. correlationb. calibration
- 44. Another name for Rayleigh waves is: a. shear waves b. longitudinal waves c. transverse waves d. surface wavesd. surface waves
- 55. A material used between the faces of a transducer and the test surface to permit or improve the transmission of ultrasonic vibration from the transducer to the material being tested is called: a. a wetting agent b. a couplant c. an acoustic transmitter d. a lubricantb. a couplant
- 66. The piezoelectric material in a transducer that vibrates to produce ultrasonic waves is called a: a. backing material b. Lucite wedge c. crystal d. couplantc. crystal
- 77. In contact testing, the entry surface indication is sometimes referred to as: a. the initial pulse b. the back reflection c. the skip distance d. the scan patha. the initial pulse
- 88. An ultrasonic instrument display pattern containing a large number of low-level indications (often rrferred to as "hash") could be caused by: a. a crack b. a large inclusion c. coarse-grained material d. a gas pocketc. coarse-grained material
- 99. A test method employing two separate tranducers on opposite surfaces of the material being tested is called: a. contact testing b. surface wave testing c. through-transmission testing d. Lamb wave testingc. through-transmission testing
- 1010. Moving a transducer over a test surface either manually or automatically is referred to as: a. scanning b. attenuating c. angulating d. resonatinga. scanning
- 1111. In immersion testing, the most commonly used couplant is: a. water b. oil c. glycerine d. alcohola. water
- 1212. The piezoelectric material in the transducer: a. converts electrical energy into sound b. converts electrical energy into mechanical energy c. eliminates the signal-to-noise energy d. produces high speed electrons in metalsb. converts electrical energy into mechanical energy
- 1313. The reference holes in standard aluminim area amplitude ultrasonic test blocks contain: a. flat bottom holes b. concave-surface holes c. convex-surface holes d. conical-shape holesa. flat bottom holes
- 1414. Ultrasonic waves transmitted into and received from the test material in the form of repetitive burst of acoustic energy is called: a. pulse echo testing b. continuous wave testing c. resonance testing d. none of the abovea. pulse echo testing
- 1515. Metal blocks, which contain one or more drilled holes to simulate discontinuities, are called: a. scrubbers b. crystal collimators c. single plane angulators d. reference blocksd. reference blocks
- 1616. The depth of a discontinuity cannot be determined when using the: a. straight beam testing method b. through-transmission testing method c. angle beam testing method d. immersion testing methodb. through-transmission testing method
- 1717. When performing a surface wave test, indications may result from: a. improper frequency b. oil on the surface c. a surface discontinuity d. the acoustical velocity of aluminumc. a surface discontinuity
- 1818. Transducers constructed with a plastic wedge or standoff between the transducer element and the test piece are commonly used for: a. for angle beam contact testing b. for immersion testing c. to eliminate the need for couplant d. to reduce the speed of electronsa. for angle beam contact testing
- 1919. Which of the following materials of the same alloy is most likely to produce the greatest amount of sound attenuation over a given distance? a. A hand forging. b. A coarse-grained casting. c. An extrusion. d. The attenuation is equal in all material.b. A coarse-grained casting.
- 2020. When the motion of tje particles of a medium is parallel to the direction of propagation, the wave being transmitted is called a: a. longitudinal wave b. shear wave c. surface wave d. Lamb wavea. longitudinal wave
- 2121. When the motion of the particles of a medium is transverse to the direction of propagation, the wave being transmitted is called a: a. longitudinal wave b. shear wave c. surface wave d. Lamb wavec. surface wave
- 2222. When a vertical indication has reached the maximum signal height which can be displayed or viewed on the display of an ultrasonic instrument, the indication is said to have reached its: a. distance amplitude height b. absorption level c. vertical level d. limit of resolutionc. vertical level
- 2323. A test method in which the parts to be inspected are placed in a water bath or some other liquid couplant.is called: a. contact testing b. immersion testing c. surface wave testing d. through-transmission testingb. immersion testing
- 2424. When the incident angle is chosen to be between the first and second angle critical angles, the ultrasonic wave mode within the partwill be a: a. longitudinal wave b. shear wave c. surface wave d. Lamb waveb. shear wave
- 2525. The formula used to calculate the angle of refraction within a material is called: a. Fresnel's law b. Fraunhofer's law c. Snell's law d. Lamb's lawc. Snell's law
- 2626. A circuit that generates a burts of alterning voltage that is applied to the sending of the transducer is called a: a. pulsar b. receiver- amplifier c. damping d. clocka. pulsar
- 2727. A type of data prestion most likely to be used with a high speed automatic scanning system is: a. an A-scan presentation b. a velocity versus amplitude plot c. a C-scan presentation d. a plot of echo height versus depthc. a C-scan presentation
- 2828. What can cause nonrelevant indication on the cathode ray tube? a. contoured surfaces b. edge effects c. surface conditions d. all of the aboved. all of the above
- 2929. The proper interpretaion and evaluation of the presented defect signals are essential to any nondestructive test. A common method for the estimation of defect size is the use of: a. a double transducer test b. a piezoeletric standard c. mode conversion d. a reference standardd. a reference standard
- 3030. Another name for Fresnel zone is: a. Fraunhofer zone b. near field c. far field d. Torrid zoneb. near field
- 3131. The velocity of sound in a material is dependent upon the: a. frequency of the wave b. wavelength c. material properties d. vibration cyclec. material properties
- 3232. In immersion testing , a wetting agent is added to the water to: a. adjust the viscosity b. help eliminate the formation of bubbles c. prevent cloudiness d. none of the above.b. help eliminate the formation of bubbles