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MCQs

Total Questions : 936 | Page 5 of 94 pages
Question 41. The centrifugal casting method, is used for casting articles of
  1.    Symmetrical shape about vertical axis
  2.    Symmetrical shape about horizontal axis
  3.    Irregular shape
  4.    Nonferrous metal only
 Discuss Question
Answer: Option B. -> Symmetrical shape about horizontal axis
Question 42. A casting defect which occurs near the ingates as rough lumps on the surface of a casting is known as
  1.    Shift
  2.    Sand wash
  3.    Swell
  4.    Scab
 Discuss Question
Answer: Option B. -> Sand wash
Question 43. When the molten metal is fed in the cavity of a metallic mould by gravity, the method of casting is known as
  1.    Die casting method
  2.    Slush casting method
  3.    Permanent mould casting method
  4.    Centrifugal casting method
 Discuss Question
Answer: Option C. -> Permanent mould casting method
Question 44. Swab is used for
  1.    Smoothing and cleaning out depressions in the mould
  2.    Cleaning the moulding sand
  3.    Moistening the sand around the edge before removing pattern
  4.    Reinforcement of sand in the top part of the moulding box
 Discuss Question
Answer: Option C. -> Moistening the sand around the edge before removing pattern
Question 45. The shrinkage allowance for cast iron pattern is
  1.    10 mm/m
  2.    16 mm/m
  3.    20 mm/m
  4.    26 mm/m
 Discuss Question
Answer: Option A. -> 10 mm/m
Question 46. The advantage of Thermit welding is that
  1.    All parts of the weld section are molten at the same time
  2.    Weld cools almost uniformly
  3.    Results in a minimum problem with internal residual stresses
  4.    All of the above
 Discuss Question
Answer: Option D. -> All of the above
Question 47. When the dimension is expressed as 20­ -0.025 ⁺⁰∙⁰³⁵, then the basic size is
  1.    20 mm
  2.    20.035 mm
  3.    20.025 mm
  4.    19.975 mm
 Discuss Question
Answer: Option A. -> 20 mm
Question 48. The dowels are
  1.    Wooden nails
  2.    Box nails
  3.    Wire nails
  4.    None of these
 Discuss Question
Answer: Option A. -> Wooden nails
Question 49. Sand wash is a casting defect which
  1.    Results in a mismatching of the top and bottom parts of a casting
  2.    Results in general enlargement of the casting
  3.    Occurs near the ingates as rough lumps on the surface of a casting
  4.    Occurs as sand patches on the upper surface of a casting
 Discuss Question
Answer: Option C. -> Occurs near the ingates as rough lumps on the surface of a casting
Question 50. Shift is a casting defect which
  1.    Results in a mismatching of the top and bottom parts of a casting
  2.    Results in general enlargement of a casting
  3.    Occurs near the ingates as rough lumps on the surface of a casting
  4.    Occurs as sand patches on the upper surface of a casting
 Discuss Question
Answer: Option A. -> Results in a mismatching of the top and bottom parts of a casting

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