1
GATE ME 2006
+2
-0.6
A $$4$$ $$mm$$ thick sheet is rolled with $$300$$ $$mm$$ diameter rolls to reduce thickness without any change in its width. The friction coefficient at the work-roll interface is $$0.1.$$ The minimum possible thickness of the sheet that can be produced in a single pass is
A
$$1.0mm$$
B
$$1.5mm$$
C
$$2.5mm$$
D
$$3.7mm$$
2
GATE ME 2006
+2
-0.6
In a wire drawing operation, diameter of a steel wire is reduced from $$10$$ $$mm$$ to $$8$$ $$mm.$$ the mean flow stress of the material is $$400$$ $$MPa.$$ The ideal force required for drawing ignoring friction and redundant work is:
A
$$4.48$$ $$kN$$
B
$$8.97$$ $$kN$$
C
$$20.11$$ $$kN$$
D
$$31.41$$ $$kN$$
3
GATE ME 2004
+2
-0.6
In a rolling process, sheet of $$25$$ $$mm$$ thickness is rolled to $$20$$ $$mm$$ thickness. Roll is of diameter $$600$$ $$mm$$ and it rotates at $$100$$ $$rpm.$$ The roll strip contact length will be
A
$$5$$ $$mm$$
B
$$39$$ $$mm$$
C
$$78$$ $$mm$$
D
$$120$$ $$mm$$
4
GATE ME 2003
+2
-0.6
A brass billet is to be excluded from its initial diameter of $$100mm$$ to a final diameter of $$50mm$$. The working temperature is $${700^ \circ }C$$ and the extrusion constant is $$250$$ $$MPa.$$ The force required for extrusion is
A
$$5.44$$ $$MN$$
B
$$2.72$$ $$MN$$
C
$$1.36$$ $$MN$$
D
$$0.36$$ $$MN$$
GATE ME Subjects
EXAM MAP
Medical
NEET