1

GATE PI 2003

MCQ (Single Correct Answer)

+2

-0.6

2

GATE PI 2003

MCQ (Single Correct Answer)

+5

-1.5

A weld is made using $$MIG$$ welding process with the following welding parameters: Current: $$200A;$$ Voltage: $$25V;$$ Welding speed: $$18$$ $$cm/min;$$ wire diameter: $$1.2$$ $$mm;$$ Wire feed rate: $$4$$ $$m/min;$$ Thermal efficiency of the process: $$65\% $$

The heat input per unit length of the weld in $$kJ/cm$$ is:

3

GATE PI 2003

MCQ (Single Correct Answer)

+5

-1.5

A weld is made using $$MIG$$ welding process with the following welding parameters: Current: $$200A;$$ Voltage: $$25V;$$ Welding speed: $$18$$ $$cm/min;$$ wire diameter: $$1.2$$ $$mm;$$ Wire feed rate: $$4$$ $$m/min;$$ Thermal efficiency of the process: $$65\% $$

The area of cross section of weld bead in $$m{m^2}$$ is:

4

GATE PI 2003

MCQ (Single Correct Answer)

+2

-0.6

Tool life equation for two tools under consideration are as follows

$$\eqalign{
& HSS:\,\,\,\,\,\,\,\,\,\,\,\,\,V{T^{0.2}} = 150 \cr
& Carbide:\,\,\,\,\,\,V{T^{0.3}} = 250 \cr} $$

Where $$V$$ is the cutting speed in $$m/min$$ and $$T$$ is the tool life in $$min.$$ The breakdown cutting speed above which the carbide tool will be beneficial is

Paper analysis

Total Questions

Casting

4

Joining of Materials

9

Machine Tools and Machining

13

Metal Forming

8

Metrology

1

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