ফাউন্ড্রি এন্ড প্যাটার্ন মেকিং MCQ
41. Metal patterns have a longer life than wooden pattern.
True
False
42. Which among the following wood is mast widely used for making patterns?
White Pine
Mahogany
Maple
Teak
43. Core boxes are made out of which pattern?
Plaster pattern
Metal patterns
Polystyrene pattern
Wax pattern
44. What should the sulphur level in foam plastic be?
More than 1%
Between 0.5% 1.19%
Less than 0.1%
Between 0.1% to 0.5%
45. Which of the following material is not used for mold making?
Iron
Mild steel
Zinc
Alloy steel
46. Which of the following patterns has high compressive strength?
Plastic pattern
Plaster pattern
Polystyrene pattern
Wax pattern
47. Which of the following is not a limitation of metal patterns?
Get rusted
Obtain rough surface finish
Expensive
Heavy
48. The ability of moulding sand to withstand the heat of melt without showing any sign of called as-.
Strength
Refractiveness
Collapsibility
None
49. Which of the following is the heaviest?
White
Cast Iron
Brass
Aluminium
50. Which of the following statement is true?
Casting is the replica of the object to be cast
Pattern is the replica of the casting object
Casting and the pattern are same things
Molten material is cassed into the casting cavity
51. Which of the following is 'not' an allowance given to the pattern for casting?
Shrinkage
Hole
Draft
Machining
52. Which of the following patterns do not withstand rough handling?
Cast iron
Aluminium
Brass
Steel
53. Which of the following is not a limitation of wooden patterns?
Get abraded easily
Absorb moisture
Difficult machining
Poor wear resistance
54. Which of the following is considered to be light wood?
Mahogany
Birch
Maple
White pine
55. In sand castings, modification of bosses is done to-
have good surface finish
reduce the chances of porosity
eliminate the use of core
reduce casting yield
56. Which of the following is not a criteria for selecting pattern materials?
Method of moulding
Establishment of parting fine
Chances of repeat orders
Complexity of the casting
57. Runners, gates and risers are attached to the pattern to-
Provide ease of cooling
Provide feed to the molten material
Provide design to the casting
Enhance the finishing of the casting
58. Steel is an alloy of which two elementy?
Iron and Brass
Brass and aluminium
Iron and carbon
Carbon and aluminium
59. Casting replica used to make the cavity is called as--
Mould
Cope
Pattern
None of the above
60. Which of the following is not a criteria for selecting pattern materials?
Method of moulding
Establishment of parting line
Chances of repeat orders
Complexity of the casting