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Wednesday, June 28, 2017

GATE Manufacturing Engineering Previous Year Questions: Metal Casting Set-2

Gate Manufacturing Engineering Previous Year Questions [1997-2017]

Metal Casting: SET-2

11. Which of the following materials requires the largest shrinkage allowance, while making a pattern for casting [ME: 1999]
A. Aluminium
B. Brass
C. Cast iron
D. Plain carbon steel

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12. Disposable patterns are made of [ME: 2000]
A. Wood
B. Rubber
C. Metal
D. Polystyrene

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13. Shrinkage allowance on pattern is provided to compensate for shrinkage when [ME: 2001]
A. the temp of liquid metal drops from pouring to freezing temp
B. the metal changes from liquid to solid state at freezing temp
C. the temp of solid phase drops from freezing to room temp
D. the temp of metal drops from pouring to room temp

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14. In centrifugal casting, the lighter impurities are [ME: 2002]
A. uniformly distributed
B. forced towards the outer surface
C. trapped near the mean radius of the casting
D. collected at the centre of the casting

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15. The primary purpose of sprue in the casting mould is to [ME: 2002]
A. feed the casting at the rate consistent with the rate of solidification
B. Act as a reservoir for molten metal
C. feed molten metal from the pouring basin to the gate
D. help feed the casting until all solidification takes place

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16. Hardness of green sand mould increases with [ME: 2003]
A. increase in moisture content beyond 6 percent
B. increase in permeability
C. decrease in permeability
D. increase in both moisture content and permeability

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17. Misrun is a casting defect which occurs due to [ME: 2004]
A. very high pouring temperature of the metal
B. insufficient fluidity of the molten metal
C. absorption of gases by the liquid metal
D. improper alignment of the mould flasks

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18. An expendable pattern is used in [ME: 2006]
A. Slush casting
B. Squeeze casting
C. Centrifugal casting
D. Investment casting

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19. Which of the following engineering materials is the most suitable candidate for hot chamber die casting [ME: 2007]
A. Low carbon steel
B. Titanium
C. Copper
D. Tin

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20. Two stream of liquid metal which are not hot enough to fuse properly result into a casting defect known as [ME: 2009]
A. Cold Shut
B. Swell
C. Sand wash
D. Scab

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