Mechanical Engineer Portal

Mechanical Engineers Portal

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

View Answer
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

View Answer
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

View Answer
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

View Answer
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

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

View Answer
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

View Answer
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

View Answer
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

View Answer
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

View Answer

No comments:

Post a Comment Powered by Blogger.