1
GATE PI 2003
+2
-0.6
A cylinder of $$25mm$$ diameter and $$100mm$$ length is turned with a tool, for which the relation $$V{T^{0.25}} = 55$$ is applicable. The cutting velocity is $$22m/min.$$ For a tool feed of $$0.046$$ $$mm/rev,$$ the number of tool regrinds required to produce $$425$$ cylinders is
A
$$12$$
B
$$22$$
C
$$43$$
D
$$85$$
2
GATE PI 2003
+5
-1.5
The following data refers to an orthogonal machining of mild steel with a single point $$HSS$$ tool. Rake angle of tool $$= {10^ \circ },$$ uncut chip thickness $$=0.3mm,$$ width of cut $$=2.0mm,$$ single plane shear angle $$= {36^ \circ },$$ shear strength of mild steel $$=450$$ $$MPa,$$ using Merchants analysis

The coefficient of friction between the chip and tool will be

A
$$0.141$$
B
$$0.344$$
C
$$0.532$$
D
$$0.688$$
3
GATE PI 2003
+5
-1.5
The following data refers to an orthogonal machining of mild steel with a single point $$HSS$$ tool. Rake angle of tool $$= {10^ \circ },$$ uncut chip thickness $$=0.3mm,$$ width of cut $$=2.0mm,$$ single plane shear angle $$= {36^ \circ },$$ shear strength of mild steel $$=450$$ $$MPa,$$ using Merchants analysis

The shear force in cutting will be

A
$$270$$ $$N$$
B
$$333.75$$
C
$$450$$ $$N$$
D
$$459.34$$ $$N$$
4
GATE PI 2003
+1
-0.3
Which one of the following is not a synthetic abrasive material
A
silicon carbide
B
aluminium oxide
C
titanium nitride
D
cubic boron nitride
GATE PI Papers
2017
2016
2015
2014
2013
2012
2011
2010
2009
2008
2007
2006
2005
2004
2003
2002
2001
1995
1994
1993
1992
1991
1990
1989
EXAM MAP
Medical
NEET