function Question (qname, type, qstring, response, comment, corrects, explan, score, ifcorrect,ifwrong,ifnull, img) {this.qname=qname; this.type=type; this.qstring=qstring; this.response=response; this.comment=comment; this.corrects=corrects; this.explan=explan; this.score=score; this.ifcorrect=ifcorrect; this.ifwrong=ifwrong; this.ifnull=ifnull; this.img=img; } var zin=1,top=0, mycount=0, waitTime=0, qright=0, mycomment; var global=new Array(3); var recent, recent2, recdone=false, opera7, opera=CheckOpera56(); function cachewrite(s,idx){global[idx]+=s;} function CheckOpera56() { var version; if (navigator.userAgent.toLowerCase().indexOf('opera') == -1) return false; version=parseInt(navigator.appVersion.toLowerCase()); if (version>6) {opera7=true; return false;} if (version<5) return false; return true; } resp=new Array("Couplant","Fluorescent particles","Reference standards","Non abrasive cleaners") corr=new Array("0","0","1","0") comm="" valu="" quest001 = new Question( "Question 1", 0, "Since eddy current signals are affected by many different variables, it is particularly important to use what when setting up the equipment? ", resp, comm, corr, "", valu, 1, 0, 0, ""); resp=new Array("A reference standard","An identified defect","A crack which is ˝ the rejection criteria","A crack twice the rejection criteria") corr=new Array("1","0","0","0") comm="" valu="" quest002 = new Question( "Question 2", 0, "In almost all cases, eddy current inspection procedures require the equipment to be calibrated to:", resp, comm, corr, "", valu, 1, 0, 0, ""); resp=new Array("Material thickness","Material geometry","Material conductivity","All of the above") corr=new Array("0","0","0","1") comm="" valu="" quest003 = new Question( "Question 3", 0, "Which component features should be similar to the reference standard?", resp, comm, corr, "", valu, 1, 0, 0, ""); resp=new Array("Are never used because they are too wide","Are never used due to their heat affected zones","Are commonly used to represent cracks","Both A and B") corr=new Array("0","0","1","0") comm="" valu="" quest004 = new Question( "Question 4", 0, "Narrow EDM notches and saw cuts:", resp, comm, corr, "", valu, 1, 0, 0, ""); resp=new Array("Pitting","Cracks","Delaminations","
None of the above") corr=new Array("1","0","0","0") comm="" valu="" quest005 = new Question( "Question 5", 0, "Drilled holes are commonly used to represent:", resp, comm, corr, "", valu, 1, 0, 0, ""); resp=new Array("Conductivity standards","Tube discontinuity standards","Hole discontinuity standards","All of the above") corr=new Array("0","0","0","1") comm="" valu="" quest006 = new Question( "Question 6", 0, "Which of the following are a common eddy current reference standard?", resp, comm, corr, "", valu, 1, 0, 0, ""); resp=new Array("It should be added to the base signal","It is not directly related to the probe drive frequency","Should be added to the pick-up coil","Should be subtracted from the amplitude of the dB") corr=new Array("0","1","0","0") comm="" valu="" quest007 = new Question( "Question 7", 0, "Filtering is applied to the received signal and, therefore:", resp, comm, corr, "", valu, 1, 0, 0, ""); resp=new Array("High Pulse Filter","Harmonic Pulse Filter","High Pass Filter","High Pulse Factor") corr=new Array("0","0","1","0") comm="" valu="" quest008 = new Question( "Question 8", 0, "HPF stands for:", resp, comm, corr, "", valu, 1, 0, 0, ""); resp=new Array("Low Pulse Frequency","Low Pass Filter","Last Pass Filter","Low Pass Frequency") corr=new Array("0","1","0","0") comm="" valu="" quest009 = new Question( "Question 9", 0, "LPF stands for:", resp, comm, corr, "", valu, 1, 0, 0, ""); resp=new Array("Hz","KHz","MHz","THz") corr=new Array("1","0","0","0") comm="" valu="" quest010 = new Question( "Question 10", 0, "Filters are adjusted in:", resp, comm, corr, "", valu, 1, 0, 0, ""); resp=new Array("Low frequencies to pass and filters out the high frequencies","High frequencies to pass and filters out the low frequencies","For the combined frequencies to be adjusted to a harmonic balance","The shape of the waveform to be clipped beyond it frequency balance") corr=new Array("0","1","0","0") comm="" valu="" quest011 = new Question( "Question 11", 0, "The HPF allows:", resp, comm, corr, "", valu, 1, 0, 0, ""); resp=new Array("When using a small transducer","When using a large transducer","When using a high pass filter","When using a large low frequency probe") corr=new Array("0","0","1","0") comm="" valu="" quest012 = new Question( "Question 12", 0, "Scanning speed must be controlled:", resp, comm, corr, "", valu, 1, 0, 0, ""); resp=new Array("Control probe wobble","Adjust the machine to the proper conductivity standard","Shift the waveform to the left of the screen","Remove high frequency interference noise") corr=new Array("0","0","0","1") comm="" valu="" quest013 = new Question( "Question 13", 0, "The main function of the LPF is to:", resp, comm, corr, "", valu, 1, 0, 0, ""); resp=new Array("Eliminate low frequencies which are produced by slow changes, such as a conductivity shift","Adjust the bandwidth to a neutral frequency in order to maximize depth of penetration","Remove any standing waves in the output signal","Shift the waveform from positive to negative when a rejectable defect is identified") corr=new Array("1","0","0","0") comm="" valu="" quest014 = new Question( "Question 14", 0, "The HPF is used to:", resp, comm, corr, "", valu, 1, 0, 0, ""); resp=new Array("On thin parts","On thick parts","When scanning manually","On ferrous parts") corr=new Array("0","0","1","0") comm="" valu="" quest015 = new Question( "Question 15", 0, "Use of the HPF is not recommended:", resp, comm, corr, "", valu, 1, 0, 0, ""); resp=new Array("Surface probe variety","Bolt hole variety","Bobbin (ID) variety","All of the above are correct") corr=new Array("0","0","1","0") comm="" valu="" quest016 = new Question( "Question 16", 0, "Probes for inspection of pipe and tubing are typically of the:", resp, comm, corr, "", valu, 1, 0, 0, ""); resp=new Array("Surface probes","Bolt hole probes","ID probes","All of the above") corr=new Array("0","0","0","1") comm="" valu="" quest017 = new Question( "Question 17", 0, "Some common classifications of probes include:", resp, comm, corr, "", valu, 1, 0, 0, ""); resp=new Array("Reference probe","Surface probe","Transmission probe","Reflection probe") corr=new Array("0","1","0","0") comm="" valu="" quest018 = new Question( "Question 18", 0, "A probe that is often intended to be used in contact with the test surface is called a:", resp, comm, corr, "", valu, 1, 0, 0, ""); resp=new Array("They transmit a frequency that will slightly resonate the part surface","They create a static magnetic field","The axis of the coil is perpendicular to the test surface","Both B and C") corr=new Array("0","0","1","0") comm="" valu="" quest019 = new Question( "Question 19", 0, "Most surface probe coils are wound so that:", resp, comm, corr, "", valu, 1, 0, 0, ""); resp=new Array("Be easily detected with a surface probe","Be easily detected with an internal probe","Be easily detected with an external probe","None of the above") corr=new Array("0","0","0","1") comm="" valu="" quest020 = new Question( "Question 20", 0, "Discontinuities, such as delaminations, that are in a plane that is parallel with the test surface will likely:", resp, comm, corr, "", valu, 1, 0, 0, ""); resp=new Array("Large areas for very small cracks","Small areas for delaminations","Large areas for relatively large defects","None of the above") corr=new Array("0","0","1","0") comm="" valu="" quest021 = new Question( "Question 21", 0, "Wide surface probes are used when scanning:", resp, comm, corr, "", valu, 1, 0, 0, ""); resp=new Array("Pancake probes","Pencil probes","Encircling probes","Sliding probes") corr=new Array("0","1","0","0") comm="" valu="" quest022 = new Question( "Question 22", 0, "Which type of probe has a long slender housing to permit inspection in restricted spaces?", resp, comm, corr, "", valu, 1, 0, 0, ""); resp=new Array("Energy spikes","Low frequency noise","Wobble","Both A and C") corr=new Array("0","0","1","0") comm="" valu="" quest023 = new Question( "Question 23", 0, "Pencil probes are prone to:", resp, comm, corr, "", valu, 1, 0, 0, ""); resp=new Array("Pencil probes","Surface probes","Bolt hole probes","Bobbin probes") corr=new Array("0","0","1","0") comm="" valu="" quest024 = new Question( "Question 24", 0, "Which type of probe is most often used to inspect the inside diameter of a machined hole?", resp, comm, corr, "", valu, 1, 0, 0, ""); resp=new Array("Encircling or bobbin probes","Circumference probes","Pencil probes ","None of the above") corr=new Array("1","0","0","0") comm="" valu="" quest025 = new Question( "Question 25", 0, "A probes that can be used to inspect the entire circumference of test objects are:", resp, comm, corr, "", valu, 1, 0, 0, ""); resp=new Array("Bobbin probes","Surface coils","Encircling coils","Pencil probes") corr=new Array("0","0","1","0") comm="" valu="" quest026 = new Question( "Question 26", 0, "Which type of probe is most commonly sued to inspect solid products such as bar stock?", resp, comm, corr, "", valu, 1, 0, 0, ""); resp=new Array("Prevent external electrical interference","Limit the spread and concentrate the magnetic field of the coil","Magnetically saturate the part","None of the above") corr=new Array("0","1","0","0") comm="" valu="" quest027 = new Question( "Question 27", 0, "Probe shielding and loading are sometimes used to:", resp, comm, corr, "", valu, 1, 0, 0, ""); resp=new Array("Shape the eddy currents to the curvature of the part","Reduce the inductive coupling of the probe and part","Increase the probe impedance","Reduce the effects of nonrelevant features in close proximity to the probe") corr=new Array("0","0","0","1") comm="" valu="" quest028 = new Question( "Question 28", 0, "Probe shielding is used to:", resp, comm, corr, "", valu, 1, 0, 0, ""); resp=new Array("Ferrite ","Aluminum","Lead","Both A and B") corr=new Array("0","0","0","1") comm="" valu="" quest029 = new Question( "Question 29", 0, "What material(s) is/are commonly used to shield an eddy current probe?", resp, comm, corr, "", valu, 1, 0, 0, ""); resp=new Array("More effective shielding will be due to skin effect","Deeper the eddy currents will penetrate","Stronger the probe's magnetic field will be","Both A and C") corr=new Array("1","0","0","0") comm="" valu="" quest030 = new Question( "Question 30", 0, "The higher the frequency of the current used to drive the probe, the:", resp, comm, corr, "", valu, 1, 0, 0, ""); resp=new Array("Shift the transmission of eddy currents in order to decrease penetration","Allow the probe to operate at a higher frequency","Concentrate the magnetic field near the center of the probe","Allow testing of very dense materials") corr=new Array("0","0","1","0") comm="" valu="" quest031 = new Question( "Question 31", 0, "The main purpose of an iron core in a probe is to:", resp, comm, corr, "", valu, 1, 0, 0, ""); resp=new Array("Be more sensitive than air core probes and less affected by probe wobble","Be more difficult to use","Increase the background noise of the signal","Both B and C") corr=new Array("1","0","0","0") comm="" valu="" quest032 = new Question( "Question 32", 0, "Probes with iron cores tend to:", resp, comm, corr, "", valu, 1, 0, 0, ""); resp=new Array("Iron","Copper","Silver","Platinum") corr=new Array("0","1","0","0") comm="" valu="" quest033 = new Question( "Question 33", 0, "The coil in an eddy current probe is most often made from:", resp, comm, corr, "", valu, 1, 0, 0, ""); resp=new Array("L","M","Z","X") corr=new Array("1","0","0","0") comm="" valu="" quest034 = new Question( "Question 34", 0, "Inductance is identified by the letter:", resp, comm, corr, "", valu, 1, 0, 0, ""); resp=new Array("The interaction of a changing magnetic field with a conductor","Direct current","Resistance in the coil","None of the above") corr=new Array("1","0","0","0") comm="" valu="" quest035 = new Question( "Question 35", 0, "Inductance is caused by:", resp, comm, corr, "", valu, 1, 0, 0, ""); resp=new Array("Resistance ","Inductive reactance","A small amount of capacitance","All of the above") corr=new Array("0","0","0","1") comm="" valu="" quest036 = new Question( "Question 36", 0, "An eddy current test circuit will have:", resp, comm, corr, "", valu, 1, 0, 0, ""); resp=new Array("The more penetrating the eddy currents will be","The less sensitive the coil will be","The more sensitive the coil will be","None of the above") corr=new Array("0","0","1","0") comm="" valu="" quest037 = new Question( "Question 37", 0, "The higher the inductance of a coil at a given frequency:", resp, comm, corr, "", valu, 1, 0, 0, ""); resp=new Array("Roentgen's formulas","Maxwell's inductance bridge","Reciprocity","The Inverse Square Law") corr=new Array("0","1","0","0") comm="" valu="" quest038 = new Question( "Question 38", 0, "The principles of operation of the most commonly used eddy current instruments are based on:", resp, comm, corr, "", valu, 1, 0, 0, ""); resp=new Array("Detect surface and near surface cracks","Measure electrical conductivity","Measure the thickness of nonconductive coatings on plastics","Both A and B") corr=new Array("0","0","0","1") comm="" valu="" quest039 = new Question( "Question 39", 0, "Eddy current testing can be used to:", resp, comm, corr, "", valu, 1, 0, 0, ""); resp=new Array("Should be as high as possible","Should be as low as possible","Depends on the conductivity and permeability of the material","Depends only on the material conductivity") corr=new Array("1","0","0","0") comm="" valu="" quest040 = new Question( "Question 40", 0, "When testing for surface flaws, the probe drive frequency used:", resp, comm, corr, "", valu, 1, 0, 0, ""); resp=new Array("As high as possible","As low as possible","Calculated to produce a 90o difference between the liftoff and flaw signals","None of the above") corr=new Array("0","0","1","0") comm="" valu="" quest041 = new Question( "Question 41", 0, "When testing for subsurface flaws, the frequency should be: ", resp, comm, corr, "", valu, 1, 0, 0, ""); resp=new Array("Large flat surfaces","Inside bolt holes","In radiuses","Around the edges of fasteners") corr=new Array("0","0","0","1") comm="" valu="" quest042 = new Question( "Question 42", 0, "Sliding probes are used to test:", resp, comm, corr, "", valu, 1, 0, 0, ""); resp=new Array("Reflection mode","Through-transmission mode","Pulsed mode","Differential mode") corr=new Array("1","0","0","0") comm="" valu="" quest043 = new Question( "Question 43", 0, "Sliding probes usually operate in the:", resp, comm, corr, "", valu, 1, 0, 0, ""); resp=new Array("1","2","3","4") corr=new Array("0","0","1","0") comm="" valu="" quest044 = new Question( "Question 44", 0, "When making a conductivity measurement, the thickness of the material should be at least ___ times the standard depth of penetration. ", resp, comm, corr, "", valu, 1, 0, 0, ""); resp=new Array("Increase","Decrease","Remain the same","Remain the same until the probe touches the material") corr=new Array("0","1","0","0") comm="" valu="" quest045 = new Question( "Question 45", 0, "When a probe is brought near a conductive but nonmagnetic material, the coil's inductive reactance will:", resp, comm, corr, "", valu, 1, 0, 0, ""); resp=new Array("Magnetic permeability","Electrical resistivity","Probe drive frequency","All of the above") corr=new Array("0","0","0","1") comm="" valu="" quest046 = new Question( "Question 46", 0, "The depth of penetration is affected by:", resp, comm, corr, "", valu, 1, 0, 0, ""); resp=new Array("A absolute probe","A differential probe","A reflection probe","Both B and C") corr=new Array("0","1","0","0") comm="" valu="" quest047 = new Question( "Question 47", 0, "When maintaining constant liftoff is a problem, what type of probe should be used?", resp, comm, corr, "", valu, 1, 0, 0, ""); resp=new Array("High frequency","Variable frequency","Low frequency","None of the above") corr=new Array("0","0","1","0") comm="" valu="" quest048 = new Question( "Question 48", 0, "When using the liftoff trace of an impedance plane instrument to distinguish between several materials with high electrical conductivity, it is best to test using a:", resp, comm, corr, "", valu, 1, 0, 0, ""); resp=new Array("They are directly proportional","They are not related","One is the inverse of the other","It depends on the test frequency") corr=new Array("0","0","1","0") comm="" valu="" quest049 = new Question( "Question 49", 0, "What is the relationship between electrical conductivity and electrical resistivity? ", resp, comm, corr, "", valu, 1, 0, 0, ""); resp=new Array("A frequency change due to liftoff","An impedance change due to a change in conductivity","An impedance change due to liftoff","Both A and C") corr=new Array("0","0","1","0") comm="" valu="" quest050 = new Question( "Question 50", 0, "When using eddy currents to measure the thickness of a nonconductive coating applied to a conductive base, the measurement is based on:", resp, comm, corr, "", valu, 1, 0, 0, ""); resp=new Array("Flat surfaces","Radiuses","Holes","Both B and C") corr=new Array("0","0","1","0") comm="" valu="" quest051 = new Question( "Question 51", 0, "A bolt hole probe and scanner is used to inspect:", resp, comm, corr, "", valu, 1, 0, 0, ""); resp=new Array("Increase with discontinuity depth","Decrease with discontinuity depth","Is the same as phase angle","Is the same as the angle separating the liftoff and flaw signals on an impedance plane") corr=new Array("1","0","0","0") comm="" valu="" quest052 = new Question( "Question 52", 0, "Phase lag:", resp, comm, corr, "", valu, 1, 0, 0, ""); resp=new Array("Remain unchanged","Increase because the material will concentrate the magnetic field in and around the coil","Decrease because the material will concetrate the magnetic field in and around the coil","Decrease because the magnetic field of the coil will be weakened by the material") corr=new Array("0","1","0","0") comm="" valu="" quest053 = new Question( "Question 53", 0, "When an absolute probe is brought near a ferromagnetic material, the inductive reactance of the coil will:", resp, comm, corr, "", valu, 1, 0, 0, ""); resp=new Array("The permeability in a vacuum","A unitless value","The ratio of the measured permeability and the permeability in a vacuum
","Both B and C") corr=new Array("0","0","0","1") comm="" valu="" quest054 = new Question( "Question 54", 0, "Relative permeability is:", resp, comm, corr, "", valu, 1, 0, 0, ""); resp=new Array("A conductive material is placed in a changing magnetic field","When a conductive material is moved through a static magnetic field","When a static magnetic field is moved across the surface of a conductive material","All of the above") corr=new Array("0","0","0","1") comm="" valu="" quest055 = new Question( "Question 55", 0, "Eddy currents are generated when:", resp, comm, corr, "", valu, 1, 0, 0, ""); questions = new Array ( quest001,quest002,quest003,quest004,quest005,quest006,quest007,quest008,quest009,quest010,quest011,quest012,quest013,quest014,quest015,quest016,quest017,quest018,quest019,quest020,quest021,quest022,quest023,quest024,quest025,quest026,quest027,quest028,quest029,quest030,quest031,quest032,quest033,quest034,quest035,quest036,quest037,quest038,quest039,quest040,quest041,quest042,quest043,quest044,quest045,quest046,quest047,quest048,quest049,quest050,quest051,quest052,quest053,quest054,quest055) function doQuestion(quest) { var numdo; var numord=eval(quest+1); var i=-1, ii, type, myname, gadget; type=questions[quest].type; numdo=type>=3?1:questions[quest].response.length; document.writeln ("") document.write("\n") document.write(" \n") document.write(" \n") document.write(" \n") document.write(" \n") document.write(" \n") document.write(" \n") document.write(" \n") document.write(" \n") document.write(" \n") document.write(" \n") document.write(" \n") document.write(" \n") document.write(" \n") document.write(" \n") document.write(" \n") document.write(" \n") document.write(" \n") document.write(" \n") document.write(" \n") document.write(" \n") document.write(" \n") document.write(" \n") document.write(" \n") document.write(" \n") document.write(" \n") document.write(" \n") document.write(" \n") document.write(" \n") document.write("
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You have made the following errors

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