Quizzes 0% 172 Created on April 08, 2023 Welding Quiz - 1 Welding Quiz - 1 1 / 10 Pre-heating a carbon steel manual metal arc welding is carried out to minimise the risk of: Scattered porosity Worm hole porosity Parent metal cracking Lack of penetration 2 / 10 When manual metal arc welding is being carried out on an open construction site, which group of welders are most likely to require continuous monitoring: Concrete shuttering welding teams Pipe welding teams Plate welders Plant maintenance welders 3 / 10 The steel composition in a structural contract is changed from 0.15% carbon 0.6% manganese, to 0.2% carbon 1.2% manganese. This might influence the incidence of: Porosity Cracking in the weld area Undercut for fillet welds Lack of fusion defects 4 / 10 One of the following alloys is non-magnetic. which one? 4.0% chromium molybdenum 12.0% chromium Austentic stainless steel 9.0% nickel steel 5 / 10 When open site working, serious porosity in metal arc welds is brought to your attention. What would you investigate? Electrode type Power plant type Electrode stroage Day temperature 6 / 10 You notice manual metal arc electrodes, stripped of flux, are being used as filler wire for TIG welding. You would object because: It is too expensive The wire would be too thick The metal composition may be wrong The wire is too short 7 / 10 When TIG welding austentic stainless steel pipe, argon gas backing is called for: Prevent oxidation Prevent underbead cracking Prevent porosity Control the penetration bead shape 8 / 10 When 'hydrogen control' is specified for a maual metal arc welding project the electrode would normally be: Cellulose Iron Oxide Acid Basic 9 / 10 You would certainly recognise a hydrogen controlled flux covered electrode from its: Colour Length Trade Name BS639/AWS code letter 10 / 10 In UK practice, BS499 specifies that the drawing dimension quoted for a fillet weld is the: Leg Length Throat thickness Weld width Actual throat thickness Your score isThe average score is 53% LinkedIn Facebook VKontakte 0% Restart quiz 0% 313 Created on September 28, 2022 Radiography Quiz - 2 QUIZ-2 1 / 10 Co-59 becomes Co-60 , when it is placed in a nuclear reactor , where it captures electrons protons neutrons Atoms 2 / 10 The unit of activity is sievert Becquerel Gray none of the above 3 / 10 The project area of the target of an X ray tube is called focal spot focus effective focal spot Geometric unsharpness 4 / 10 Depleted uranium is used in some radiography cameras because it is a good shielding material a low density material and so light cheap and easily available none of the above 5 / 10 The atomic number of an element is the number of electrons in the atom the number of protons in the nucleus of the atom the total number of proton and neutrons in the nucleus of the atom the number of neutrons in an atom 6 / 10 Isotope of an element differ in their mass number atomic number electron number none of the above 7 / 10 When radiation removes an electron from an atom , the process is called a good shielding material a low density material and so light cheap and easily available none of the above 8 / 10 When radiation removes an electron from an atom , the process is called pair production ionization biological damage none of the above 9 / 10 The energy of gamma rays from iridium 192 is equal to cesium 137 gamma energy greater than cobalt 60 gamma ray less than cobalt 60 gamma energy none of the above 10 / 10 The half life of a radioactive source is one half of the total life of the source the period in which the energy of the source becomes half the period in which the activity of the source becomes half none of the above Your score isThe average score is 53% LinkedIn Facebook VKontakte 0% Restart quiz 0% 265 Created on September 14, 2022 Radiography Quiz QUIZ-1 1 / 10 the energy of gamma and x ray is expressed by which of the following units of measurement curie roentgen half life kilo electron volt or million electron volt 2 / 10 The concentration of the radioactive material in a gamma source is referred to as the specific activity of the source the quality of the source the atomic weight of the source the half life of the source 3 / 10 a radioisotope and stable isotope of an element differ in their mass number atomic number chemical property none of the above 4 / 10 to radiograph a 175 mm thick steel plate , which of the following gamma ray sources would be used. cobalt-60 thulium – 170 Iridium -192 cesium – 137 5 / 10 the curies per gram for a gamma ray source is called as the specific activity of the source the quality of the source the atomic weight of the source the half life of the source 6 / 10 1 Curie is equivalent of 001 milli Ci 1000 milli Ci 100 Mega Ci .000001 micro Ci 7 / 10 A radioisotope which undergoes 3.7 x 1012 disintegration per second will have an activity of 3.7 Ci 100 Ci 10milli Ci 370 Ci 8 / 10 radioactivity of 1 Bq corresponds to 3.7 x 1010 disintegrations per second 1 x 1010 disintegrations per second 3.7 x 1004 disintegrations per second none of the above 9 / 10 The radiation quality of a gamma ray source is Determined by the size of the focal spot Determined by the curie of the source Determined by the type of isotope involved Can be verified by the operator 10 / 10 the emission of alpha radiation from a radioisotope leads to a daughter product with change in mass number change in atomic number change in atomic and mass number none of the above Your score isThe average score is 52% LinkedIn Facebook VKontakte 0% Restart quiz 0% 2130 Created on June 04, 2021Liquid Penetrant Testing Liquid Penetrant Testing Quiz-1 1 / 10 How is the size of a liquid penetrant indication usually related to the discontinuity itrepresents: Larger than Not related to Equal to Smaller than 2 / 10 Penetrant testing is limited by its inability to test which of the following materials: Moulded rubber Aluminium Ceramics Porous materials 3 / 10 The penetrant process best suited to use on parts with rough surfaces is: Magnetic particle Water washable Solvent removable Post emulsifiable 4 / 10 In the solvent removable penetrant process, excess penetrant is removed with: Clean, lint free towels slightly moistened with solvent A water spray A solvent spray A hydrophilic scrubber 5 / 10 Correct developer coating thickness is indicated by: A fine, misting spray A thin, translucent layer A slightly pinkish background An even, snowy white appearance 6 / 10 Liquid penetrant testing is based on the principle of: Absorption of X rays Magnetic domains Capillary action Polarized sound waves in a liquid 7 / 10 The act of determining the cause of an indication is called Determination Inspection Evaluation Interpretation 8 / 10 The time period during which penetrant remains on the surface of the test piece is called: Fixing time Dwell time Soaking time Development time 9 / 10 Penetrants may be applied to the surface of part by : Dipping Pouring All of the above methods are acceptable Spraying 10 / 10 Which penetrant process is best suited to detect shallow discontinuities? Fluorescent Water washable Post emulsifiable Solvent removable Your score isThe average score is 64% LinkedIn Facebook VKontakte 0% Restart quiz 0% 1225 Created on June 04, 2021Liquid Penetrant Testing Liquid Penetrant Testing Quiz-2 1 / 10 Which of the following types of pre-cleaning processes may be used for liquid penetrant testing? Wire brushing only Detergent and water only Vapour degreasing only Any process that leaves the part clean and dry, does not harm the part and is compatible with the penetrant materials 2 / 10 What is the preferred pre-cleaning process for removal of oil and grease : Ultrasonic cleaning Steam cleaning with a added acid Vapour degreasing Steam cleaning 3 / 10 What type of solvent removers may be used with a solvent removable penetrant? Only chlorinated hydrocarbons Any organic solvent Any alcohol based solvents Only the cleaner recommended by the manufacturer of the penetrant 4 / 10 Visible, solvent removable penetrants are most advantageous for: Inspecting parts with rough surfaces Inspecting batches of small parts Inspecting parts at remote locations Inspecting parts with porous surfaces 5 / 10 What is the likely result of incomplete removal of all excess penetrant from the test piece surface? Formation of relevant indications Exaggeration of the size of relevant indications Formation of false indications None of the above 6 / 10 Which of the following is a prerequisite for a penetrant test? Developer must be applied in a thin, even coat The test object must be non-magnetic All traces of penetrant materials should be removed after testing is complete Any surface coatings or soils must be completely removed 7 / 10 Which of the following penetrants contains an emulsifying agent? Fluorescent Post emulsifiable Water washable Solvent removable 8 / 10 What minimum warm-up time is required for acceptable performance of a mercury Vapour arc black light? 2 minutes 5 minutes None 10 minutes 9 / 10 For adequate test results, the black light used in fluorescent penetrant examination should provide what minimum black light intensity at the test surface? 1000 microwatts per square centimetre 100 foot candles per square centimetre 35 microwatts per square centimeter 800 foot candles 10 / 10 A hydrometer is used to measure: Cleaner specific gravity Penetrant viscosity Penetrant specific gravity Specific gravity of water based wet developers Your score isThe average score is 68% LinkedIn Facebook VKontakte 0% Restart quiz 0% 964 Created on June 04, 2021Liquid Penetrant Testing Liquid Penetrant Testing Quiz-3 1 / 10 Excess penetrant removal is a two step process with which of the following penetrant methods? Liquid oxygen applications Water washable Solvent removable Post emulsifiable 2 / 10 Which of the following is a function of a developer Providing a contrasting background for visible dye indications Making the penetrant water washable Dissolve organic soils on the test piece surface Penetrating into discontinuities open to the surface 3 / 10 The time period during which penetrant remains on the surface of the test piece is called: Soaking time Dwell time Development time Fixing time 4 / 10 The most sensitive type of developer for the detection of fine discontinuities is: Non-aqueous wet Dry Water Suspendable Water soluble 5 / 10 Which of the following is a function of a developer? Providing a contrasting background for visible dye indications Accentuates presence of discontinuities by causing a penetrant indication to spread out over a larger area Provides capillary paths to aid the bleed out process All of the above 6 / 10 A developer aids penetrant bleed out because of: Proper emulsifier action Providing a contrasting background for visible dye indications Capillary action Adequate removal of the excess penetrant 7 / 10 Which of the following developers is applied before the drying operation? Water based wet Dry Non-aqueous wet None of the above 8 / 10 In the solvent removable penetrant process, excess penetrant is removed with: A hydrophilic scrubber Clean, lint free towels slightly moistened with solvent A solvent spray A water spray 9 / 10 Which of the following is the most sensitive developer in descending order? Water suspendable, water soluble, non-aqueous wet Non-aqueous wet, dry, water soluble Non-aqueous wet, water soluble, water suspendable ,dry Dry, water soluble, water suspendable 10 / 10 Water based wet developer is applied: For maximum sensitivity results Immediately before removal of excess penetrant After a drying period following removal of excess penetrant Immediately after removal of excess penetrant Your score isThe average score is 69% LinkedIn Facebook VKontakte 0% Restart quiz 0% 959 Created on July 08, 2021Liquid Penetrant Testing Magnetic Particle Testing Quiz-1 1 / 10 Magnetic particle is a nondestructive examination method used for : Locating near surface discontinuities Detecting material separation Locating surface discontinuities Both a and b 2 / 10 The magnetic field is strongest when the : Magnetizing current is flowing Magnetizing current is not flowing Materials exhibits high coercive forces Magnetizing voltage is flowing 3 / 10 Which statement is true when related to magnetic lines of force ? They never cross They seek the path of least resistance They are most dense at the poles of a magnet All of the above 4 / 10 The unit usually used to denote flux density is the : Henry Ampere Gauss Farad 5 / 10 Ferromagnetic material is : Not capable of being magnetized Capable of being magnetized Strongly attracted by a magnet Both a and b 6 / 10 If a crack exists in a circular magnet , the attraction of magnetic particles to the crack is caused by : Leakage field Coercive force High reluctance at the crack Doppler effect 7 / 10 The permeability of a material describes the : Ease with which it can be magnetized Ability to retain the magnetic field Depth of magnetic field in the part Length of time required to demagnetize it 8 / 10 Why are magnetic particles available in different colors ? To enhance the detection of indications For color contrast with the part surface Both a and b Different colors are used with different magnetic flux values. 9 / 10 The retentivity of a material describes the : Ability to retain the magnetic field Length of time required to demagnetize it Ease with which it can be magnetized Depth of magnetic field in the part 10 / 10 Which of the following can be magnetized ? Cobalt Nickel All of the above Iron Your score isThe average score is 68% LinkedIn Facebook VKontakte 0% Restart quiz 0% 764 Created on July 08, 2021Liquid Penetrant Testing Magnetic Particle Testing Quiz-2 1 / 10 In longitudinal magnetization the proper term for calculating magnetizing force is : Ohms Watts Ampere turns Amperes 2 / 10 Magnetic flux lines which are parallel to a discontinuity produce : Weak indications No indications Fuzzy indications Strong indications 3 / 10 A part is adaptable to magnetic particle inspection if : The material is ferromagnetic The materials is an electric conductor The material is non ferrous It is attached to an electro static field 4 / 10 The proper number of ampere turns for a given test specimen is determined by : Its length Both a and b Its diameter The material 5 / 10 What rule describes the direction of current flow when lines of magnetic force surround a conductor? The left hand thump rule The flux rule The right hand thumb rule The reluctance rule 6 / 10 A coil around the part produces : Either a or b depending on the type of current applied A longitudinal field A circular field An intermittent field 7 / 10 A circular filed may be induced into a specimen by : Central conductor Direct induction (head shot) Direct induction (prods) All of the above 8 / 10 The magnitude of the residual magnetic field in a specimen is dependent on the : Strength of the applied magnetic force Right hand rule L/D ratio Left hand rule 9 / 10 Magnetic lines of force : Travel in straight lines Form a closed loop Are randomly oriented Overlay in highly ferromagnetic materials 10 / 10 An electrical yoke produces : A swinging filed A circular field A longitudinal field Alternating fields Your score isThe average score is 67% LinkedIn Facebook VKontakte 0% Restart quiz
