1. How does pattern vary in size with casting? size depends on other factors both have same size casting is larger in size pattern is larger in size 2. Which of the following is the most important property of the molding sand in cores? collapsibility green strength dry strength cohesiveness 3. Which of the following parts is provided in between the mould and casing to reduce the vibrations? metallic roller grease viscous fluid steel balls 4. Electric arc furnaces are most suitable for which of the following type of material? non-ferrous ferrous both ferrous and nonferrous neither ferrous nor nonferrous 5. In precision investment casting, to make the mould the prepared pattern is dipped into a slurry. From which material is this slurry is made up of? sodium silicate neither ethyl nor sodium silicate ethyl silicate both ethyl and sodium silicate 6. Pattern used in shell moulding is normally made up of? wood plastic metal wax 7. Shrinkage allowance does not depend on which of the following factor? moulding method pouring temperature of molten metal amount of finish required casting dimension 8. The casting process that does not require a core to produce a hollow casting is? shell moulding true centrifugal casting permanent mould casting hot-chamber die casting 9. What is hearth in a furnace? the bowl shaped bottom of the furnace the walls of the furnace the electrodes are often called hearth the dome shaped roof of the furnace 10. How are the metals to be welded connected to each other in spot welding? magnetic field direct contact electric contact mechanical pressure 11. Up to what thickness, can steel be welded using spot welding process? 11 mm 10 mm 13 mm 12 mm 12. Why are flux added to the charge ( parent metal to be melted) during melting of a metal? to remove specific oxides to increase carbon content to add specific oxides to increase refractoriness 13. In which of the following type of flame, oxygen is of same proportion with acetylene? oxidizing flame both oxidizing flame and carburizing flame neutral flame carburizing flame 14. Why is inoculation done certain times during melting of cast iron? to reduce the liquid shrinkage of metal to enhance its mechanical properties to enhance the surface finishing all of the options 15. Machining allowance does not depend on which of the following factor? shape and size of casting solidifying contraction machining method casting method 16. In an induction furnace, mixing and melting rates are altered by? controlling the temperature ranges only controlling the number of electrodes used only controlling power and frequency of current only all of the factors 17. Which of the following types of centrifugal casting process is used for the casting, whose shape of casting is not axi- symmetric? centrifuging true centrifugal casting full centrifugal casting semi centrifugal casting 18. The machine used to mix shell mould particles consistently is mueller cupola furnace mixer & cupola furnace mixer 19. The following figure depicts which allowance? shake allowance shrinkage allowance draft allowance machining allowance 20. Cylinder and cylinder heads for air cooled IC engines are casted using which technique? die casting permanent mould casting shell moulding precision investment casting 21. Which of the following is not used for the formation of the molding sand? binders silica sand additives coal 22. What is inoculation of cast iron? addition of oxides addition of silicon alloys addition of sulphur alloys addition of parent metals ore 23. Which of the following welding process in which two pieces to be joined are overlapped and placed between two pointed electrodes? projection welding seam welding resistance welding spot welding 24. Which of the following chemical compound, is the most common flux added to the charge in a cupola furnace? limestone methane carbon dioxide coke 25. In plasma arc welding the gas is? vaporized heated ionized magnetized 26. Which of the following metal has a melting point of about 660oC and latent heat of fusion 92.7 cal/g? lead magnesium aluminium tin 27. A pattern carries which allowance for internal and external surfaces? machining allowance distortion allowance draft allowance shrinkage allowance 28. A pattern is shaken by striking it with a wooden piece. A negative allowance is provided for this. Which allowance is it? distortion allowance machining allowance rapping allowance contraction allowance 29. Gas-Fired burner is used in which of the following furnace? reverberatory furnace crucible furnace cupola furnace induction furnace 30. Which of the following is/are the advantage(s) of an Induction Furnace? cleaner melting higher yield compact installation all of the options 31. Which kind of resistance is experienced in upset butt welding? electric resistance magnetic resistance air resistance thermal resistance 32. The is responsible for the impact strength in the molding sand. refractoriness aggregates impurities permeability 33. What is draft allowance also known as? rapping allowance contraction allowance taper allowance shake allowance 34. Incoming air pressure and quantity in cupola furnace are controlled by which of the following element? blast pipe tuyeres wind box tapping spout 35. Which of the following metal has a melting point of about 420oC and latent heat of fusion 26.3 cal/g? zinc nickel copper iron 36. What is the only difference between Plasma arc welding and TIG welding? gas is not used flux is not used construction of torch is different tungsten electrode is not used 37. Which of the following metal has a melting point of about 1537oC and latent heat of fusion 65.0 cal/g? zinc nickel copper iron 38. The property ensures the removal of excess sand in the mould box. green strength cohesiveness adhesiveness compressive strength 39. In arc welding, arc is created between the electrode and work by? contact resistance flow of voltage electrical energy flow of current 40. Binding property of the sand increases because of the property. permeability collapsibility flow ability cohesiveness 41. Squeeze casting method was developed in which country? russia america india japan 42. Which of the following is not an application of blow molding process? door liners bottles toy bodies pipes 43. Which of the type of centrifugal casting methods is used to produce non- symmetrical shaped castings? semi centrifugal casting non centrifugal casting true centrifugal casting centrifuging 44. When an asymmetrical section is roll formed, the finished product will have camber cross-bow waviness a twist 45. What is the maximum pressure required in a transfer molding process? 90 mpa 120 mpa 80 mpa 100 mpa 46. In which extrusion process the direction of flow of metal is in same direction as that of ram? direct indirect impact hydrostatic 47. 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