1
GATE PI 2006
MCQ (Single Correct Answer)
+2
-0.6
A copper strip of $$200$$ $$mm$$ width and $$30$$ $$mm$$ thickness is to be rolled to a thickness of $$25$$ $$mm.$$ The roll of radius $$300$$ $$mm$$ rotates at $$100$$ $$rpm.$$ The average shear strength of the work material is $$180$$ $$MPa.$$ The roll strip contact length and the roll force are
A
$$15.8$$ $$mm$$ & $$0.59$$ $$MN$$
B
$$18.97$$ $$mm$$ & $$0.683$$ $$MN$$
C
$$38.73$$ $$mm$$ & $$1.395$$ $$MN$$
D
$$38.73$$ $$mm$$ & $$2.09$$ $$MN$$
2
GATE PI 2006
MCQ (Single Correct Answer)
+2
-0.6
A solid cylindrical stainless steel work piece of $$200mm$$ diameter and $$150mm$$ height. This component is reduced by $$50\% $$ in height with flat die in open die forging. Assuming the flow stress of the material as $$1000$$ $$MPa$$ and the coefficient of friction to be $$0.2,$$ the estimated forging force at the end of the stroke is
A
$$20.8$$ $$kN$$
B
$$31$$ $$kN$$
C
$$78.6$$ $$kN$$
D
$$78.6$$ $$MN$$
3
GATE PI 2005
MCQ (Single Correct Answer)
+2
-0.6
A level having $${90^0}$$ bend is to be produced by drop forging using mild steel bar as raw material. The various operations to be performed on it during forging are:
$$P$$ - Cutting;
$$Q$$ - Bending;
$$R$$ - Fullering;
$$S$$ - Blocking cum finishing;
$$T$$ - Edgering

The correct sequence for performing the operations is:

A
$$P - Q - R - T - S$$
B
$$R - T - Q - S - P$$
C
$$T - R - S - Q - P$$
D
$$R - Q - T - S - P$$
4
GATE PI 2005
MCQ (Single Correct Answer)
+2
-0.6
A round billet made of brass is to be extruded (extrusion constant $$=250$$ $$MPa$$ ) at $${700^ \circ }C.$$ The billet diameter is $$100$$ $$mm$$ and the diameter of the extrusion is $$50$$ $$mm.$$ The extrusion force required (in $$MN$$) is
A
$$1.932$$
B
$$2.722$$
C
$$3.423$$
D
$$4.650$$
EXAM MAP
Medical
NEET
Graduate Aptitude Test in Engineering
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CBSE
Class 12