Foundry Technology Set 11

Mechanical Engineering

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This set of Foundry Technology Multiple Choice Questions & Answers (MCQs) focuses on Foundry Technology Set 11

Q1 | Pattern draft for internal surfaces is (in mm/m)
  • 10 -- 30
  • 50 - 80
  • 40 - 70
Answer: 40 - 70
Q2 | On drying the shrinkage of wood is least
  • along the grains
  • across the grains
  • along the direction of tangent to the annular rings
Answer: along the grains
Q3 | Contraction of metal starts at the end of
  • mushy stage
  • plastic stage
  • liquid stage
  • solid stage
Answer: mushy stage
Q4 | In radiography test on castings which of the following rays are never used?
  • X-rays
  • beta rays
  • gamma rays
  • all of the above
Answer: beta rays
Q5 | Metal moulds are used in
  • dry sand moulding
  • green sand moulding
  • die casting process
  • loam moulding
Answer: die casting process
Q6 | The defect known as 'drop' occurs when the upper surface of the mould cracks and pieces of sand fall into the molten metal. This defect occurs due to
  • low mould hardness
  • insufficient reinforcement
  • low green strength
  • any of the above
Answer: any of the above
Q7 | Investment casting finds application in all of the following EXCEPT
  • Jet engine nozzles
  • Milling cutters
  • Buckets for superchargers
  • Gold ornaments
Answer: Gold ornaments
Q8 | Lowest pouring temperature alloy is
  • Phosphor bronze
  • Cupro nickel alloy
  • Monel metal
  • Tin bronze
Answer: Monel metal
Q9 | The residual stresses in casting occur due to
  • sand particles being taken into molten metal while pouring
  • the insufficient gate size
  • the differential solidification rate of thin and thick sections of casting
  • none of the above
Answer: the differential solidification rate of thin and thick sections of casting
Q10 | Local stress relief treatments are generally given to
  • small castings
  • non-ferrous castings
  • all castings
  • too large castings
Answer: too large castings
Q11 | Which of the following is used on moulds for magnesium castings to prevent metal mould reactions?
  • Boric sulphur
  • Molasses
  • Charcoal
  • all of the above
Answer: Boric sulphur
Q12 | Silica is the second most important constituent of moulding sand which provides
  • binding strength
  • refractoriness
  • chemical resistance
  • none of the above
Answer: binding strength
Q13 | Flash occurs on diecastings at the
  • gatting system
  • ejection pins
  • vents between the dies
  • parting surface of two dies
Answer: parting surface of two dies
Q14 | The methods of casting for producing ornamental pieces are
  • pressed and slush casting
  • slush and gravity casting
  • gravity and semi permanent mould casting
  • none of the above
Answer: pressed and slush casting
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