Question $1$

a$)$ Define the term 'electrode' and mention its major classifications.

$[2]$

b$)$ List the any two types of electrodes.

$[2]$

c$)$ Briefly explain the purpose of coating on arc welding electrode.

$[2]$

d$)$ Compare and contrast between shielded metal arc welding and gas welding.

$[10]$

e$)$ State and explain two limitations of MMAW.

$[2]$

f$)$ Briefly explain the applications of TIG welding.

$[7]$

Question $2$

a$)$ Distinguish between MIG and TIG.

$[10]$

b$)$ Briefly explain the principle of thermit welding.

$[5]$

c$)$ Differentiate between brazing and soldering stating their applications.

$[10]$

Question $3$

a$)$ Define pattern allowance. Explain the purpose of providing the pattern allowance. $[4]$

b$)$ State and explain two properties of good moulding sand.

$[4]$

c$)$ State and explain five purposes of core binders in sand casting.

$[10]$

d$)$ Explain the term fettling as used in casting.

$[3]$

e$)$ State and explain four reasons for having the casting defect hot air.

$[4]$

Question $4$

a$)$ Distinguish between blanking and piercing.

$[8]$

b$)$ Define the following terms:

a$.$ Coining.

$[2]$

b$.$ Embossing and

$[2]$

c$.$ Beading.

$[3]$

c$)$ Differentiate between progressive dies and compound dies.

$[10]$hi