1

GATE PI 2005

MCQ (Single Correct Answer)

+2

-0.6

The real root of the equation $$x{e^x} = 2$$ is evaluated using Newton $$-$$ Raphson's method. If the first approximation of the value of $$x$$ is $$0.8679,$$ the $${2^{nd}}$$ approximation of the value of $$x$$ correct to three decimal places is

2

GATE PI 2005

MCQ (Single Correct Answer)

+1

-0.3

Newton $$-$$ Raphson formula to find the roots of an equation $$f(x)=0$$ is given by

3

GATE PI 2005

MCQ (Single Correct Answer)

+1

-0.3

A well machined steel plate of thickness $$L$$ is kept such that the wall temperature are $${T_h}$$ and $${T_c}$$ as shown in the figure below. A smooth copper plate of the same thickness $$L$$ is now attached to the steel plate without any gap as indicated in the figure below. The temperature at the interface is $${T_i},$$ The temperature of the outer walls are still the same at $${T_h},$$ and $${T_c}.$$ The heat transfer rates are $${q_1}$$ and $${q_2}$$ per unit area in the two cases respectively in the direction shown. Which of the following statements is correct?

4

GATE PI 2005

MCQ (Single Correct Answer)

+2

-0.6

Two $$8$$ $$mm$$ thick steel plates are placed $$5$$ $$mm$$ apart and welded by a butt joint. Welding is carried out at $$20$$ $$V$$ and speed of $$5$$ $$mm/sec.$$ Heat transfer efficiency is $$0.80.$$ If the heat required to melt steel is $$10$$ $$J/m{m^3}$$ and melting efficiency is $$0.625.$$ The weld current (in Amperes) will be

Paper analysis

Total Questions

Casting

3

Engineering Mathematics

9

Heat Transfer

1

Joining of Materials

5

Machine Tools and Machining

21

Metal Forming

8

Metrology

2

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