Question $5(25$ marks$)$

a$)$ List FOUR $(4)$ electric arc welding processes and describe any two of the four you have listed.

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$\backslash$text $\{(4+\}4\backslash$text $\{$ marks$)\}$

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b$)$ With the aid of sketches name FOUR $(4)$ welding joints.

$(4$ marks$)$

c$)$ Outline FIVE $(5)$ general design guidelines for welding.

$(5$ marks$)$

d$)$ A shielded metal arc welding operation is taking place on carbon steel to produce a fillet weld. The desired welding speed is about $\backslash (30\backslash$mathrm$\{$~mm$\}/\backslash$mathrm$\{$s$\}\backslash ).$ If the power supply is $10$ V and efficiency equal to $\backslash (75\backslash \%\backslash ),$ what current is needed if the weld legs are to be $8$ mm $?$