1
GATE ME 2004
MCQ (Single Correct Answer)
+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
$$120$$ $$mm$$
2
GATE ME 2003
MCQ (Single Correct Answer)
+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
$$0.36$$ $$MN$$
3
GATE ME 1998
MCQ (Single Correct Answer)
+2
-0.6
A strip with sectional area $$150mm\,\, \times \,\,4.5mm$$ is being rolled with $$20\% $$ reduction of area using $$450mm$$ diameter rollers. The angle subtended by the deformation zone at the roll center is (in radians)
A
$$0.01$$
B
$$0.02$$
C
$$0.03$$
D
$$0.06$$
4
GATE ME 1996
MCQ (Single Correct Answer)
+2
-0.6
A wire of $$0.1mm$$ diameter is drawn from a rod of $$15mm$$ diameter dies giving reductions of $$20\% $$, $$40\% $$ and $$80\% $$ are available. For minimum error in the final size, the number of stages and reduction at each stage respectively would be
A
$$3$$ stages and $$80\% $$ reduction for all three stages
B
$$4$$ stages and $$80\% $$ reduction for first three stages followed by a finishing stage of $$20\% $$ reduction
C
$$5$$ stages and reduction of $$80\% $$, $$80\% $$, $$40\% $$, $$40\% $$, $$20\% $$ in sequence
D
None of the above
GATE ME Subjects
Turbo Machinery
EXAM MAP