ULTRASONIC TESTING (UT) Ultrasonic Testing Level 1 (UT-1) General Examination 1. The divergence of an ultrasonic beam is dependent on: (a) Transducer wavelength and diameter (b) Test specimen density (c) The sound wave's angle of incidence (d) The degree of damping of the ultrasonic transducer 2. When a longitudinal wave is incident upon an inclined interface between zero degrees and the first critical angle: (a) The sound beam is totally reflected (b) Only shear waves are produced in the second material (c) Shear waves and longitudinal waves are produced in the second material (d) Only longitudinal waves are produced in the second material 3. The piezoelectric material in a search unit which vibrates to produce ultrasonic waves is called: (a) A backing material (b) A lucite wedge (c) A transducer element or crystal (d) A couplant 4. When a longitudinal wave is incident upon an inclined interface and is refra...
ET Equipments EDDY CURRENT CALIBRATION BLOCKS ET WELD BLOCK B lock Dimensions: .312″ thick x 1.375″ wide x 3.156″ long · Three slots sizes: 0.5,0.1,0.2 ” deep · Tolerance is +/- .001″ on notches. The widest notch is .006″ with a tolerance of +/- .001. Notch Width: .006 EDM NOTCH BLOCK This block contains nine EDM slots from 0.100″ to 0.900″ deep. Slot width is 0.011″. Nominal depth is laser engraved on the side of the block. Available in most alloys by request. ...
Real-time Radiography Real-time radiography (RTR), or real-time radioscopy, is a nondestructive test (NDT) method whereby an image is produced electronically, rather than on film, so that very little lag time occurs between the item being exposed to radiation and the resulting image. In most instances, the electronic image that is viewed results from the radiation passing through the object being inspected and interacting with a screen of material that fluoresces or gives off light when the interaction occurs. The fluorescent elements of the screen form the image much as the grains of silver form the image in film radiography. The image formed is a "positive image" since brighter areas on the image indicate where higher levels of transmitted radiation reached the screen. This image is the opposite of the negative image produced in film radiography. In other words, with RTR, the lighter, brighter areas represent thinner sections or less dense ...