1
GATE PI 1991
Subjective
+5
-0
During orthogonal turning a steel rod at feed $$0.25$$ $$mm$$ per revolution and depth of cut $$4.00$$ $$mm$$ by a tool of geometry $${0^0},\, - {10^0},\,\,{8^0},\,\,{7^0},\,\,{15^0},\,\,{60^0},\,\,0\,\,(mm)\,\,;$$ the following observation were made: Tangential force $$=1,600N,$$ Axial force in feed direction $$=800$$ $$N,$$ Chip thickness $$=0.60$$ $$mm.$$ Find the coefficient of friction between chip tool interface and shear strength of work material from shear force.
2
GATE PI 1991
+1
-0.3
The teeth of both external and internal spur gears can be cut on
A
milling machine
B
gear shaping machine
C
gear hobbing machine
D
gear shaving machine
3
GATE PI 1991
+1
-0.3
Amount of energy consumption per unit volume of metal removal is maximum in
A
Turning
B
Milling
C
Reaming
D
Grinding
4
GATE PI 1991
+2
-0.6
A drilling machine has to be designed with $$8$$ spindle speeds ranging approximately between $$120$$ to $$1200$$ $$rpm.$$ The $${5^{th}}$$ spindle speed is
A
$$445$$
B
$$480$$
C
$$620$$
D
$$865$$
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