Practice Test Questions for Introductory Module on Nondestructive Testing PDF

Practice test question for introductory module on Nondestructive Testing d) 200mm ‘Which of the following statement is correct? 9 During eddy current testing, the fll factor and the ift-off should be...

Practice test question for introductory module on Nondestructive Testing d) 200mm ‘Which of the following statement is correct? 9 During eddy current testing, the fll factor and the ift-off should be \QWfi voluage in case of resistance: A maximum and minimum respectively E ) Current lags voltage in case of inductance b) minmum and maximum respectively s voliage in case of capacitance - ©) minmum d) Current lags voltage in case of resistance, inductance & capacitance d) maximum 10) The cddy current density at three SDP location is if its surface eddy current 2) P — PIP ©) Current is perpendicular to magnetic field b) 20% & =il d) Current is always parallel to magnetic field 9 5% oSPP ) 15% 3) Edgy currents are generated when: = l:v/o _ oo _ e "A conductive material is placed ina changing magnetic field ) Induced eddy currentin o test objects is: 'b) When a conductive material is moved through a static magnetic field in the coil and Parallel to current a) Same in direction % ), When a static magnetic feld is moved across the surface of a conductive material b) Opposite in direction and Paralle] to current in the coil k0 & Allofthe above ) Opposite in dircction and Perpendicular to current d) Same in direction and Perpendicular to current in the coil 4 ‘Which type of probe is most commonly used o inspest solid products such as bars stocks? 2) Bobbin probes 12) is used to inspeet installed heat exchanger fubes? What kind of probe b) Surface coils a) Encircling 2i arxist by Bobbin - 5) Relative permeabiliy is: a) The permeability ina vacuum 13) ) Pencil Determine the standard depth of penctration of eddy currents in & non-permeable material e f having clectrical condue(ivity 4 MS a an excitation frequency of 100 Kz \ b) A unit less value ¢) The ratio of the measured permeability and the permeability in a vacuum ) 0Smm = 5= —_— e - A BothBand C b) 0.3mm ot. Jny b o3y amyis T4 6) Eddy eurrent testing can be used to: @) 15mm - ofAs = o.p a) Detect surface and near surface cracks = b) Measure electrical conductiviry 14) Detcrmine the cddy current phase lag at a depth of 2.5 mm in material whose standard ¢) Measure the thickness of nonconductive coatings on plastics ‘ol penciration is 1.9 mm ata specilic frequency ) Both Aand B 2 2 75 degrees ©) 100 degress O -.Tnsv_mk\ 7 For generation of ed y currents, ©) 90 degrees R/ ircct ired d) 573 degrees A=t rromagnt coil is: ¢) Ceramic 15) ‘The fil factor when a 1/2 inch diameter bar is inserted ina 1 inch diameter 7 Electrcally conductive material is required 8) The conductivity of Aluminum Standard depth ofpenetrat is 25 times the conductivity of austenitic stainless steel. ustenitic stainless steel is 4 mm at 10 kHz. What will be & ) 025(25%) standard depth of penctration in Aluminum at 10 kHz? a) 12mm 16) gfimngwuia_kmnmiu}miizn__—nfiggm& b) 18mm ) 19Hz- 100KHz ) 50 kHz-1 MHz ») 08mm spp(4) o= u_% ReoBane. Ve an AndutkeX  © IMHz LS Mz d) zbove SMHz AJ Momentum. ‘What kind of signal is gencrated by 2 crack? 25) Identify the odd one from the following ) shockwave Resomtor b) contimuous wave ) accelerometers ) proximity probes k+ contimuous wave ) velometers 18) 26) Which of the following weld defects would be- visually detectable on a completed weld? a) Lack of interun fusion b) Sub surface porosity n.u.ifin.UDE.-..:«I ©) Lack of side wall fusion AY_s S imul acoustic t acoustic ate emission emission cvent cven |\|~0 ) Undercut 19) ‘What effect appears first when loading a materil? @ A measured amount of undercut is detected that is allowable when referenced to 2By Kaiser effect acceptable criteria. The undercut s therefore described as? Felicity effect ) A defect ©) Relawation effect b) Anindication QA flaw ) None of the above. 20) ?fionus flfig fl?» flfi% n&fl fifi, fii; @.& a%fi ‘being tested s to provide: mfii u 28) Resolution is the ability to see which of the following? ) protection for the sensor. 5 a) The ble b) ground loop eliminat ion b) Tw to each other as one {149 amedim trough which elastic stress waves can excite an acoustic cmission “§ Two fla eent (0 each other as separate flaws. d) noicoftheabove - sensor d) Alarge flaw ata distaofnce over 3 metres == 21 29) ired for human eye 0 adapt to dark condition is known as vNN. ‘What is an important wave modin AE e testing? ) Direct visual examinations may be carried out using which of the followin g? a) Longitdinal wave a) Boroscope b) Transverse wave b) Mirrors ) Lamb wave ©) Fibroscope d) {symmetric wave A7 All of the above o ©) None of the above " Minimam bow many sensors are roquired in acoustic emission planar location a) 1 31) b) 2 24) ‘Team which is not connected with vibration measurement a) Displacement———— T 32) b) velocity ©) acceleration b) Solvent removable ), Water washable oyl ®