1

GATE PI 1994

MCQ (Single Correct Answer)

+5

-1.5

In an orthogonal cutting operation,

The depth of cut $$=2$$ $$mm,$$

Width of cut $$=15$$ $$mm,$$

Cutting speed $$=0.5$$ $$m/s$$ and

The rake angle $$=0$$ deg.

The cutting force and the thrust force are respectively $$900$$ $$N$$ and $$600$$ $$N$$ and the shear angle $$=30$$ $$deg$$.

The depth of cut $$=2$$ $$mm,$$

Width of cut $$=15$$ $$mm,$$

Cutting speed $$=0.5$$ $$m/s$$ and

The rake angle $$=0$$ deg.

The cutting force and the thrust force are respectively $$900$$ $$N$$ and $$600$$ $$N$$ and the shear angle $$=30$$ $$deg$$.

The cutting power in watts is

2

GATE PI 1994

MCQ (Single Correct Answer)

+5

-1.5

In an orthogonal cutting operation,

The depth of cut $$=2$$ $$mm,$$

Width of cut $$=15$$ $$mm,$$

Cutting speed $$=0.5$$ $$m/s$$ and

The rake angle $$=0$$ deg.

The cutting force and the thrust force are respectively $$900$$ $$N$$ and $$600$$ $$N$$ and the shear angle $$=30$$ $$deg$$.

The depth of cut $$=2$$ $$mm,$$

Width of cut $$=15$$ $$mm,$$

Cutting speed $$=0.5$$ $$m/s$$ and

The rake angle $$=0$$ deg.

The cutting force and the thrust force are respectively $$900$$ $$N$$ and $$600$$ $$N$$ and the shear angle $$=30$$ $$deg$$.

The length of the shear plane is

3

GATE PI 1992

MCQ (Single Correct Answer)

+5

-1.5

A generalized tool life equation for carbide tool for machining steel is given by

$$\,\,\,\,\,\,\,\,\,\,$$$$\,\,\,\,$$ $$V{T^a}{F^b}{D^c} = K,$$

Where $$V=$$ Cutting speed, meters/min,

$$\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,$$ $$T=$$ Tool life,

$$\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,$$ $$F=$$ feed, $$mm/rev,$$

$$D=$$ depth of cut in $$mm,$$ Indicates have magnitude $$a=0.3, b=0.3, c=0.15,$$

$$\,\,\,\,\,\,\,\,\,\,$$$$\,\,\,\,$$ $$V{T^a}{F^b}{D^c} = K,$$

Where $$V=$$ Cutting speed, meters/min,

$$\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,$$ $$T=$$ Tool life,

$$\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,$$ $$F=$$ feed, $$mm/rev,$$

$$D=$$ depth of cut in $$mm,$$ Indicates have magnitude $$a=0.3, b=0.3, c=0.15,$$

If the feed is halved and depth of cut doubled, for identical tool life of $$60$$ minutes, the percentage change in speed

4

GATE PI 1992

MCQ (Single Correct Answer)

+5

-1.5

A generalized tool life equation for carbide tool for machining steel is given by

$$\,\,\,\,\,\,\,\,\,\,$$$$\,\,\,\,$$ $$V{T^a}{F^b}{D^c} = K,$$

Where $$V=$$ Cutting speed, meters/min,

$$\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,$$ $$T=$$ Tool life,

$$\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,$$ $$F=$$ feed, $$mm/rev,$$

$$D=$$ depth of cut in $$mm,$$ Indicates have magnitude $$a=0.3, b=0.3, c=0.15,$$

$$\,\,\,\,\,\,\,\,\,\,$$$$\,\,\,\,$$ $$V{T^a}{F^b}{D^c} = K,$$

Where $$V=$$ Cutting speed, meters/min,

$$\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,$$ $$T=$$ Tool life,

$$\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,$$ $$F=$$ feed, $$mm/rev,$$

$$D=$$ depth of cut in $$mm,$$ Indicates have magnitude $$a=0.3, b=0.3, c=0.15,$$

The change in productivity for the new processing conditions

Questions Asked from Metal Cutting (Marks 5)

Number in Brackets after Paper Indicates No. of Questions

GATE PI Subjects

Engineering Mechanics

Strength of Materials

Theory of Machines

Engineering Mathematics

Machine Design

Fluid Mechanics

Thermodynamics

Casting

Joining of Materials

Metal Forming

Machine Tools and Machining

Metrology

Industrial Engineering