VISUAL Testing (VT)
Clue: A flashlight, mirror, and magnifying glass are common examples of these.
Answer: What are visual inspection tools?
Clue: MT can only be used on these types of materials.
Answer: What are ferromagnetic materials?
Clue: This material pulls penetrant back out of flaws to create an indication.
Answer: What is developer?
Clue: This material is used between the transducer and test surface to help sound travel.
Answer: What is couplant?
Clue: RT commonly uses these two types of electromagnetic radiation.
Answer: What are X-rays and gamma rays?
Clue: A physical template tool used to inspect and verify the dimensions, leg length, and throat thickness of fillet welds.
Answer: What is a fillet weld gauge?
Clue: Magnetic particle indications form where this magnetic condition occurs at a discontinuity.
Answer: What is a flux leakage field?
Clue: This is the action of penetrant being drawn into a dicontinuity.
Answer: What is capilary action?
Clue: UT uses these to convert physical pressure into electricity, and electricity into physical motion or high-frequency sound waves to inspect materials.
Answer: What is a piezo crystal in a transducer?
Clue: This is commonly used industrial radiography to verify radiographic sensitivity and image quality.
Answer: What is a penetrameter or Image Quality Indicator (IQI)?
Clue: This visual inspection tool uses flexible fiber optics to inspect areas that are difficult to access directly.
Answer: What is a fiber borescope?
Clue: This type of magnetizing current is commonly used when subsurface discontinuities must be detected.
Answer: What is direct current (DC)?
Clue: This type is preferred for inline penetrant systems that consist of bulk penetrant materials in tanks.
Answer: What is Type I fluorescent?
Clue: On an Ultrasonic Testing A-scan display, the vertical height of the signal indicates the strength of the reflected beam.
Answer: What is signal amplitude?
Clue: The term in Radiographic Testing that describes the blur or penumbra at the edges of a radiographic image is calculated by the formula Ug = Fd / D.
Answer: What is geometric unsharpness?
Clue: The formation and violent collapse of gas bubbles in fluids. When fast-moving liquid hits areas of high pressure, these bubbles implode and create powerful shock waves.
Answer: What is cavitation?
Clue: A curved graph that shows the link between the magnetizing force (H) and the resulting magnetic flux density (B) in a metal.
Answer: What is a hysteresis loop?
Clue: At temperatures between 40° and 50°, reduced capillary action and slower bleed-out require this adjustment to dwell time.
Answer: When is the dwell time doubled to 20 minutes due to higher viscosity?
Clue: Sound reflects from a flaw and travels back to the transducer.
Answer: What is reflection or an echo?
Clue: Areas of increased material thickness appear this way on a radiographic film.
Answer: What is lighter or more opaque?
Clue: This is a dangerous failure process caused by the combination of susceptible material, a corrosive environment, and tensile stress. It leads to sudden, unexpected cracks in metal parts.
Answer: What is stress corrosion cracking?
Clue: The process of removing residual magnetism after an inspection where the material holds onto its residual magnetism strongly and needs a large reverse magnetic field to clear it.
Answer: What is a high coercive force in demagnetization?
Clue: This liquid penetrant technique is most sensitive for small, shallow indications.
Answer: What is the Postemulsified penetrant method?
Clue: This compensation accounts for changes in echo height related to variations in discontinuity depth within the test material.
Answer: What is distance amplitude correction?
Clue: In radiographic testing the developing of film is a chemical process of reducing these particles in the exposed portion of the film emulsion.
Answer: What are silver bromide or silver halide particles?