1
GATE PI 2013
+2
-0.6
A disc of $$200$$ $$mm$$ outer and $$80$$ $$mm$$ inner diameter is faced at a feed of $$0.1$$ $$mm/rev$$ with a depth of cut of $$1$$ $$mm.$$ The facing operation is undertaken at a constant cutting speed of $$90$$ $$m/min$$ in a $$CNC$$ lathe. The main (tangential) cutting force is $$200$$ $$N$$

Neglecting the contribution of the feed force towards cutting power, the specific cutting energy in $$J/m{m^3}$$ is

A
$$0.2$$
B
$$2$$
C
$$200$$
D
$$2000$$
2
GATE PI 2012
+2
-0.6
In a shaping process, the number of double strokes per minute is $$30$$ and the quick return ratio is $$0.6,$$ If the length of the stroke is $$250mm,$$ the average cutting velocity in $$m/min$$ is
A
$$3.0$$
B
$$4.5$$
C
$$7.5$$
D
$$12.0$$
3
GATE PI 2012
+2
-0.6
In a single pass drilling operation, a through hole of $$15$$ $$mm$$ diameter is to be drilled in a steel plate of $$50mm$$ thickness. Drill spindle speed is $$500epm,$$ feed is $$0.2mm/rev$$ and drill point angle is $${118^ \circ }.$$ Assuming $$2mm$$ clearance at approach and exit, the total drill time (in seconds) is
A
$$35.1$$
B
$$32.4$$
C
$$31.2$$
D
$$30.1$$
4
GATE PI 2011
+2
-0.6
The number of defective produced by a six sigma process (in Parts per million) is
A
$$5.2$$
B
$$4.2$$
C
$$3.2$$
D
$$2.2$$
GATE PI Subjects
Fluid Mechanics
Metrology
Theory of Machines
Engineering Mathematics
Heat Transfer
Machine Tools and Machining
Industrial Engineering
Engineering Mechanics
Strength of Materials
Thermodynamics
Machine Design
Casting
Joining of Materials
Metal Forming
EXAM MAP
Joint Entrance Examination