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 One of the following alloys is non-magnetic. which one? 4.0% chromium molybdenum 12.0% chromium Austentic stainless steel 9.0% nickel steel 3 / 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 4 / 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 5 / 10 You would certainly recognise a hydrogen controlled flux covered electrode from its: Colour Length Trade Name BS639/AWS code letter 6 / 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 7 / 10 When 'hydrogen control' is specified for a maual metal arc welding project the electrode would normally be: Cellulose Iron Oxide Acid Basic 8 / 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 9 / 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 10 / 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 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 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 2 / 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 3 / 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 4 / 10 The unit of activity is sievert Becquerel Gray none of the above 5 / 10 The project area of the target of an X ray tube is called focal spot focus effective focal spot Geometric unsharpness 6 / 10 When radiation removes an electron from an atom , the process is called pair production ionization biological damage 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 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 9 / 10 Isotope of an element differ in their mass number atomic number electron number none of the above 10 / 10 Co-59 becomes Co-60 , when it is placed in a nuclear reactor , where it captures electrons protons neutrons Atoms 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 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 2 / 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 3 / 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 4 / 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 5 / 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 6 / 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 7 / 10 1 Curie is equivalent of 001 milli Ci 1000 milli Ci 100 Mega Ci .000001 micro Ci 8 / 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 9 / 10 a radioisotope and stable isotope of an element differ in their mass number atomic number chemical property none of the above 10 / 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 Your score isThe average score is 52% LinkedIn Facebook VKontakte 0% Restart quiz 0% 2131 Created on June 04, 2021Liquid Penetrant Testing Liquid Penetrant Testing Quiz-1 1 / 10 Which penetrant process is best suited to detect shallow discontinuities? Fluorescent Post emulsifiable Solvent removable Water washable 2 / 10 The act of determining the cause of an indication is called Interpretation Evaluation Determination Inspection 3 / 10 The time period during which penetrant remains on the surface of the test piece is called: Fixing time Soaking time Dwell time Development time 4 / 10 In the solvent removable penetrant process, excess penetrant is removed with: A water spray Clean, lint free towels slightly moistened with solvent A hydrophilic scrubber A solvent spray 5 / 10 Correct developer coating thickness is indicated by: A thin, translucent layer An even, snowy white appearance A slightly pinkish background A fine, misting spray 6 / 10 The penetrant process best suited to use on parts with rough surfaces is: Post emulsifiable Water washable Magnetic particle Solvent removable 7 / 10 Penetrants may be applied to the surface of part by : All of the above methods are acceptable Dipping Pouring Spraying 8 / 10 Liquid penetrant testing is based on the principle of: Capillary action Absorption of X rays Polarized sound waves in a liquid Magnetic domains 9 / 10 Penetrant testing is limited by its inability to test which of the following materials: Porous materials Aluminium Ceramics Moulded rubber 10 / 10 How is the size of a liquid penetrant indication usually related to the discontinuity itrepresents: Smaller than Larger than Not related to Equal to 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 Visible, solvent removable penetrants are most advantageous for: Inspecting parts at remote locations Inspecting parts with rough surfaces Inspecting batches of small parts Inspecting parts with porous surfaces 2 / 10 Which of the following types of pre-cleaning processes may be used for liquid penetrant testing? Detergent and water only Any process that leaves the part clean and dry, does not harm the part and is compatible with the penetrant materials Vapour degreasing only Wire brushing only 3 / 10 What is the preferred pre-cleaning process for removal of oil and grease : Steam cleaning Steam cleaning with a added acid Ultrasonic cleaning Vapour degreasing 4 / 10 Which of the following penetrants contains an emulsifying agent? Solvent removable Fluorescent Water washable Post emulsifiable 5 / 10 Which of the following is a prerequisite for a penetrant test? Any surface coatings or soils must be completely removed All traces of penetrant materials should be removed after testing is complete Developer must be applied in a thin, even coat The test object must be non-magnetic 6 / 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 7 / 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 8 / 10 A hydrometer is used to measure: Penetrant specific gravity Specific gravity of water based wet developers Cleaner specific gravity Penetrant viscosity 9 / 10 What is the likely result of incomplete removal of all excess penetrant from the test piece surface? Formation of relevant indications Formation of false indications None of the above Exaggeration of the size of relevant indications 10 / 10 What minimum warm-up time is required for acceptable performance of a mercury Vapour arc black light? None 2 minutes 5 minutes 10 minutes 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 Which of the following is a function of a developer Providing a contrasting background for visible dye indications Penetrating into discontinuities open to the surface Dissolve organic soils on the test piece surface Making the penetrant water washable 2 / 10 The most sensitive type of developer for the detection of fine discontinuities is: Water soluble Non-aqueous wet Water Suspendable Dry 3 / 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 4 / 10 Which of the following is a function of a developer? Provides capillary paths to aid the bleed out process Providing a contrasting background for visible dye indications Accentuates presence of discontinuities by causing a penetrant indication to spread out over a larger area All of the above 5 / 10 Which of the following developers is applied before the drying operation? Non-aqueous wet Water based wet Dry None of the above 6 / 10 Excess penetrant removal is a two step process with which of the following penetrant methods? Solvent removable Post emulsifiable Water washable Liquid oxygen applications 7 / 10 In the solvent removable penetrant process, excess penetrant is removed with: A water spray Clean, lint free towels slightly moistened with solvent A hydrophilic scrubber A solvent spray 8 / 10 The time period during which penetrant remains on the surface of the test piece is called: Development time Soaking time Fixing time Dwell time 9 / 10 Water based wet developer is applied: Immediately after removal of excess penetrant After a drying period following removal of excess penetrant Immediately before removal of excess penetrant For maximum sensitivity results 10 / 10 A developer aids penetrant bleed out because of: Providing a contrasting background for visible dye indications Adequate removal of the excess penetrant Proper emulsifier action Capillary action 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 Ferromagnetic material is : Strongly attracted by a magnet Both a and b Capable of being magnetized Not capable of being magnetized 2 / 10 Why are magnetic particles available in different colors ? Both a and b For color contrast with the part surface Different colors are used with different magnetic flux values. To enhance the detection of indications 3 / 10 If a crack exists in a circular magnet , the attraction of magnetic particles to the crack is caused by : High reluctance at the crack Leakage field Doppler effect Coercive force 4 / 10 The magnetic field is strongest when the : Materials exhibits high coercive forces Magnetizing current is not flowing Magnetizing current is flowing Magnetizing voltage is flowing 5 / 10 Which of the following can be magnetized ? Iron Cobalt Nickel All of the above 6 / 10 Magnetic particle is a nondestructive examination method used for : Locating near surface discontinuities Detecting material separation Locating surface discontinuities Both a and b 7 / 10 The retentivity of a material describes the : Depth of magnetic field in the part Ease with which it can be magnetized Length of time required to demagnetize it Ability to retain the magnetic field 8 / 10 The unit usually used to denote flux density is the : Henry Gauss Farad Ampere 9 / 10 The permeability of a material describes the : Ease with which it can be magnetized Length of time required to demagnetize it Ability to retain the magnetic field Depth of magnetic field in the part 10 / 10 Which statement is true when related to magnetic lines of force ? They never cross They seek the path of least resistance All of the above They are most dense at the poles of a magnet 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 The magnitude of the residual magnetic field in a specimen is dependent on the : Strength of the applied magnetic force L/D ratio Left hand rule Right hand rule 2 / 10 A part is adaptable to magnetic particle inspection if : The materials is an electric conductor The material is ferromagnetic The material is non ferrous It is attached to an electro static field 3 / 10 A circular filed may be induced into a specimen by : Direct induction (prods) Central conductor All of the above Direct induction (head shot) 4 / 10 What rule describes the direction of current flow when lines of magnetic force surround a conductor? The right hand thumb rule The flux rule The reluctance rule The left hand thump rule 5 / 10 Magnetic lines of force : Form a closed loop Are randomly oriented Travel in straight lines Overlay in highly ferromagnetic materials 6 / 10 A coil around the part produces : A circular field A longitudinal field An intermittent field Either a or b depending on the type of current applied 7 / 10 The proper number of ampere turns for a given test specimen is determined by : Its diameter Both a and b Its length The material 8 / 10 Magnetic flux lines which are parallel to a discontinuity produce : Fuzzy indications No indications Strong indications Weak indications 9 / 10 In longitudinal magnetization the proper term for calculating magnetizing force is : Amperes Ohms Watts Ampere turns 10 / 10 An electrical yoke produces : A longitudinal field A circular field Alternating fields A swinging filed Your score isThe average score is 67% LinkedIn Facebook VKontakte 0% Restart quiz
