1
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
$$0.688$$
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 shear force in cutting will be

A
$$270$$ $$N$$
B
$$333.75$$
C
$$450$$ $$N$$
D
$$459.34$$ $$N$$
3
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
4
GATE PI 2003
+1
-0.3
The flanks of teeth of rack-type gear cutter used for cutting involute gear profiles are:
A
Cycloidal
B
Circular
C
Involute
D
Straight
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