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MCQs

Total Questions : 936 | Page 11 of 94 pages
Question 101. A jolt machine is used to
  1.    Ram the sand harder at the pattern face with decreasing hardness towards the back of the mould
  2.    Ram the sand harder at the back of the mould and softer on the pattern face
  3.    Produce uniform sand hardness throughout the mould
  4.    Produce uniform packing of sand in the mould
 Discuss Question
Answer: Option A. -> Ram the sand harder at the pattern face with decreasing hardness towards the back of the mould
Question 102. The diaphragm moulding machine is used to
  1.    Ram the sand harder at the pattern face with decreasing hardness towards the back of the mould
  2.    Ram the sand harder at the back of the mould and softer on the pattern face
  3.    Produce uniform packing of sand in the mould
  4.    Give uniform sand hardness throughout the mould
 Discuss Question
Answer: Option D. -> Give uniform sand hardness throughout the mould
Question 103. In a centrifugal casting method
  1.    Core is made of sand
  2.    Core is made of ferrous metal
  3.    Core is made of nonferrous metal
  4.    No core is used
 Discuss Question
Answer: Option D. -> No core is used
Question 104. The acetylene cylinder is usually painted with
  1.    Black colour
  2.    White colour
  3.    Maroon colour
  4.    Yellow colour
 Discuss Question
Answer: Option C. -> Maroon colour
Question 105. The temperature of the inner luminous cone of neutral flame is about
  1.    1000°C
  2.    1250°C
  3.    2100°C
  4.    3200°C
 Discuss Question
Answer: Option D. -> 3200°C
Question 106. The oxygen cylinder is usually painted with
  1.    Black colour
  2.    White colour
  3.    Maroon colour
  4.    Yellow colour
 Discuss Question
Answer: Option A. -> Black colour
Question 107. The operation of cutting a cylindrical hole in a sheet of metal by the punch and die is called
  1.    Shearing
  2.    Piercing
  3.    Punching
  4.    Blanking
 Discuss Question
Answer: Option B. -> Piercing
Question 108. A moving mandrel is used in
  1.    Wire drawing
  2.    Tube drawing
  3.    Metal cutting
  4.    Forging
 Discuss Question
Answer: Option B. -> Tube drawing
Question 109. The electrode tip diameter (d) in spot welding should be equal to (where t = Thickness of plate to be welded)
  1.    √t
  2.    1.5 t
  3.    3 t
  4.    6 t
 Discuss Question
Answer: Option A. -> √t
Question 110. Which of the following statement is wrong?
  1.    The hot chamber die casting machine is used for casting zinc, tin, lead and other low melting alloys.
  2.    The cold chamber die casting machine is used for casting aluminium, magnesium, copper base alloys and other high melting alloys.
  3.    The castings produced by centrifugal casting method have open and coarse grained structure.
  4.    All of the above
 Discuss Question
Answer: Option C. -> The castings produced by centrifugal casting method have open and coarse grained structure.

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