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Thursday, June 29, 2017

GATE Manufacturing Engineering Previous Year Questions: Metal Forming Set-1

Gate Manufacturing Engineering Previous Year Questions [1997-2017]

Metal Forming: SET-1

1. For wire drawing operation, the work material should essentially be [ME: 1987]
A. ductile
B. tough
C. hard
D. malleable

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2. The true strain for a low carbon steel bar which is obtained in length by forging is [ME: 1992]
A. 0.307
B. 0.5
C. 0.693
D. 1.0

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3. The process of hot extrusion is used to produce [ME: 1992]
A. curtain rods made of aluminium
B. steel pipes of domestic water supply
C. stainless steel tubes used in furnitures
D. large size pipes used in city water mains

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4. A test specimen is stressed slightly beyond the yield point and then unloaded. Its yield strength [ME: 1995]
A. Decrease
B. Increase
C. Remain same
D. Become equal to UTS

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5. Hot rolling of mild steel is carried out [ME: 2002]
A. at recrystallization temp
B. between 100 deg. C to 150 deg. C
C. below recrystallization temp
D. above recrystallization temp

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6. Ductility of material with work hardening [ME: 2002]
A. Increases
B. Decreases
C. Remains same
D. Unpredictable

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7. In the deep drawing of cups, blank show a tendency to wrinkle up around the periphery(flange). The most likely cause and remedy of the phenomenon are, respectively [ME: 2008]
A. Buckling due to circumferential compression; Increase blank holder pressure.
B. High blank holder pressure and high friction; Reduce blank pressure and apply lubricant
C. High temperature causing increase in circumferential length; Apply coolant to blank
D. Buckling due to circumferential compression; decrease blank holder pressure

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8. The maximum possible draft in cold rolling of sheet increases with the [ME: 2011]
A. increase in coefficient of friction
B. decrease in coefficient of friction
C. decrease in roll radius
D. increase in roll velocity

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9. The operation in which oil is permeated into the pores of a powder metallurgy product is known as [ME: 2011]
A. mixing
B. sintering
C. impregnation
D. infiltration

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10. In a rolling process, the state of stress of material undergoing deformation is [ME: 2013]
A. pure compression
B. pure shear
C. compression and shear
D. tension and shear

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