Quizzes 0% 135 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 You would certainly recognise a hydrogen controlled flux covered electrode from its: Colour Length Trade Name BS639/AWS code letter 4 / 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 5 / 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 6 / 10 When 'hydrogen control' is specified for a maual metal arc welding project the electrode would normally be: Cellulose Iron Oxide Acid Basic 7 / 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 8 / 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 9 / 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 10 / 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 Your score is The average score is 54% LinkedIn Facebook Twitter VKontakte 0% Restart quiz 0% 280 Created on September 28, 2022 Radiography Quiz - 2 QUIZ-2 1 / 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 2 / 10 Isotope of an element differ in their mass number atomic number electron number none of the above 3 / 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 4 / 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 5 / 10 Co-59 becomes Co-60 , when it is placed in a nuclear reactor , where it captures electrons protons neutrons Atoms 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 The project area of the target of an X ray tube is called focal spot focus effective focal spot Geometric unsharpness 8 / 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 9 / 10 The unit of activity is sievert Becquerel Gray none of the above 10 / 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 Your score is The average score is 53% LinkedIn Facebook Twitter VKontakte 0% Restart quiz 0% 237 Created on September 14, 2022 Radiography Quiz QUIZ-1 1 / 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 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 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 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 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 6 / 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 7 / 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 8 / 10 1 Curie is equivalent of 001 milli Ci 1000 milli Ci 100 Mega Ci .000001 micro Ci 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 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 Your score is The average score is 52% LinkedIn Facebook Twitter VKontakte 0% Restart quiz 0% 1955 Created on June 04, 2021Liquid Penetrant Testing Liquid Penetrant Testing Quiz-1 1 / 10 Penetrants may be applied to the surface of part by : Pouring All of the above methods are acceptable Dipping Spraying 2 / 10 In the solvent removable penetrant process, excess penetrant is removed with: A solvent spray A water spray Clean, lint free towels slightly moistened with solvent A hydrophilic scrubber 3 / 10 Correct developer coating thickness is indicated by: An even, snowy white appearance A slightly pinkish background A fine, misting spray A thin, translucent layer 4 / 10 The penetrant process best suited to use on parts with rough surfaces is: Post emulsifiable Solvent removable Magnetic particle Water washable 5 / 10 How is the size of a liquid penetrant indication usually related to the discontinuity itrepresents: Equal to Smaller than Not related to Larger than 6 / 10 Penetrant testing is limited by its inability to test which of the following materials: Moulded rubber Porous materials Aluminium Ceramics 7 / 10 Which penetrant process is best suited to detect shallow discontinuities? Post emulsifiable Solvent removable Water washable Fluorescent 8 / 10 Liquid penetrant testing is based on the principle of: Capillary action Polarized sound waves in a liquid Magnetic domains Absorption of X rays 9 / 10 The act of determining the cause of an indication is called Evaluation Interpretation Determination Inspection 10 / 10 The time period during which penetrant remains on the surface of the test piece is called: Dwell time Fixing time Development time Soaking time Your score is The average score is 65% LinkedIn Facebook Twitter VKontakte 0% Restart quiz 0% 1127 Created on June 04, 2021Liquid Penetrant Testing Liquid Penetrant Testing Quiz-2 1 / 10 A hydrometer is used to measure: Penetrant specific gravity Specific gravity of water based wet developers Cleaner specific gravity Penetrant viscosity 2 / 10 Which of the following penetrants contains an emulsifying agent? Water washable Fluorescent Solvent removable Post emulsifiable 3 / 10 Which of the following types of pre-cleaning processes may be used for liquid penetrant testing? Wire brushing only Vapour degreasing only 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 4 / 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 5 / 10 Which of the following is a prerequisite for a penetrant test? All traces of penetrant materials should be removed after testing is complete Developer must be applied in a thin, even coat Any surface coatings or soils must be completely removed The test object must be non-magnetic 6 / 10 What type of solvent removers may be used with a solvent removable penetrant? Any alcohol based solvents Only the cleaner recommended by the manufacturer of the penetrant Only chlorinated hydrocarbons Any organic solvent 7 / 10 What minimum warm-up time is required for acceptable performance of a mercury Vapour arc black light? 5 minutes None 10 minutes 2 minutes 8 / 10 For adequate test results, the black light used in fluorescent penetrant examination should provide what minimum black light intensity at the test surface? 35 microwatts per square centimeter 1000 microwatts per square centimetre 800 foot candles 100 foot candles per square centimetre 9 / 10 What is the preferred pre-cleaning process for removal of oil and grease : Steam cleaning with a added acid Ultrasonic cleaning Vapour degreasing Steam cleaning 10 / 10 Visible, solvent removable penetrants are most advantageous for: Inspecting parts at remote locations Inspecting parts with rough surfaces Inspecting parts with porous surfaces Inspecting batches of small parts Your score is The average score is 68% LinkedIn Facebook Twitter VKontakte 0% Restart quiz 0% 896 Created on June 04, 2021Liquid Penetrant Testing Liquid Penetrant Testing Quiz-3 1 / 10 Which of the following developers is applied before the drying operation? Water based wet None of the above Non-aqueous wet Dry 2 / 10 A developer aids penetrant bleed out because of: Proper emulsifier action Adequate removal of the excess penetrant Providing a contrasting background for visible dye indications Capillary action 3 / 10 The most sensitive type of developer for the detection of fine discontinuities is: Water soluble Non-aqueous wet Dry Water Suspendable 4 / 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 Making the penetrant water washable Dissolve organic soils on the test piece surface 5 / 10 Which of the following is the most sensitive developer in descending order? Non-aqueous wet, dry, water soluble Non-aqueous wet, water soluble, water suspendable ,dry Water suspendable, water soluble, non-aqueous wet Dry, water soluble, water suspendable 6 / 10 The time period during which penetrant remains on the surface of the test piece is called: Fixing time Dwell time Development time Soaking time 7 / 10 Excess penetrant removal is a two step process with which of the following penetrant methods? Liquid oxygen applications Solvent removable Post emulsifiable Water washable 8 / 10 Which of the following is a function of a developer? Providing a contrasting background for visible dye indications Provides capillary paths to aid the bleed out process All of the above Accentuates presence of discontinuities by causing a penetrant indication to spread out over a larger area 9 / 10 In the solvent removable penetrant process, excess penetrant is removed with: A hydrophilic scrubber A water spray Clean, lint free towels slightly moistened with solvent A solvent spray 10 / 10 Water based wet developer is applied: Immediately before removal of excess penetrant Immediately after removal of excess penetrant For maximum sensitivity results After a drying period following removal of excess penetrant Your score is The average score is 70% LinkedIn Facebook Twitter VKontakte 0% Restart quiz 0% 870 Created on July 08, 2021Liquid Penetrant Testing Magnetic Particle Testing Quiz-1 1 / 10 The magnetic field is strongest when the : Materials exhibits high coercive forces Magnetizing voltage is flowing Magnetizing current is flowing Magnetizing current is not flowing 2 / 10 Which of the following can be magnetized ? All of the above Cobalt Iron Nickel 3 / 10 Which statement is true when related to magnetic lines of force ? They are most dense at the poles of a magnet They seek the path of least resistance All of the above They never cross 4 / 10 The unit usually used to denote flux density is the : Ampere Farad Henry Gauss 5 / 10 The permeability of a material describes the : Length of time required to demagnetize it Depth of magnetic field in the part Ease with which it can be magnetized Ability to retain the magnetic field 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 Doppler effect High reluctance at the crack 7 / 10 Ferromagnetic material is : Capable of being magnetized Not capable of being magnetized Strongly attracted by a magnet Both a and b 8 / 10 Why are magnetic particles available in different colors ? For color contrast with the part surface To enhance the detection of indications Different colors are used with different magnetic flux values. Both a and b 9 / 10 Magnetic particle is a nondestructive examination method used for : Both a and b Locating surface discontinuities Locating near surface discontinuities Detecting material separation 10 / 10 The retentivity 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 Your score is The average score is 68% LinkedIn Facebook Twitter VKontakte 0% Restart quiz 0% 687 Created on July 08, 2021Liquid Penetrant Testing Magnetic Particle Testing Quiz-2 1 / 10 Magnetic flux lines which are parallel to a discontinuity produce : Strong indications Weak indications Fuzzy indications No indications 2 / 10 The magnitude of the residual magnetic field in a specimen is dependent on the : L/D ratio Strength of the applied magnetic force Right hand rule Left hand rule 3 / 10 In longitudinal magnetization the proper term for calculating magnetizing force is : Amperes Ohms Watts Ampere turns 4 / 10 What rule describes the direction of current flow when lines of magnetic force surround a conductor? The reluctance rule The flux rule The left hand thump rule The right hand thumb rule 5 / 10 A part is adaptable to magnetic particle inspection if : The material is non ferrous The material is ferromagnetic It is attached to an electro static field The materials is an electric conductor 6 / 10 A circular filed may be induced into a specimen by : All of the above Central conductor Direct induction (prods) Direct induction (head shot) 7 / 10 A coil around the part produces : A longitudinal field A circular field Either a or b depending on the type of current applied An intermittent field 8 / 10 The proper number of ampere turns for a given test specimen is determined by : The material Its length Its diameter Both a and b 9 / 10 An electrical yoke produces : A swinging filed A longitudinal field Alternating fields A circular field 10 / 10 Magnetic lines of force : Form a closed loop Are randomly oriented Travel in straight lines Overlay in highly ferromagnetic materials Your score is The average score is 67% LinkedIn Facebook Twitter VKontakte 0% Restart quiz
