PKG 221 METAL ACTUAL EXAMINATION TEST
2026 QUESTIONS WITH SOLUTIONS GRADED
A+
◉ disadvantages of metal. Answer: high cost for setting up production,
not a flexible process when considering size
◉ background. Answer: started with napoleon needing food preservation
for his army, first can was glass.
metal can made by hand using tinplating, both ends soldered to the body,
1 inch hole at top. drawing and ironing made aluminum use possible
because aluminum can't be welded
◉ Types of materials. Answer: metals - aluminum and steel
ceramics - glass, brick, concrete
plastics - polymers, rubber, wood
◉ general properties of metal. Answer: strength to weight, stiff, tough,
hard, ductile, conductive, barrier, machinability, reusable, high cost
, ◉ stiffness, toughness, ductile, brittle, permeability. Answer: s - measure
of how easy it is to stretch/bend
t - how much energy a material can absorb without breaking
d - material that can stretch a lot before rupture
b - deform very little before they break
p - how easily gas moves through
◉ alloying, cold working, annealing. Answer: all - add elements
c - deform at room temps, forging, drawing
ann - best to soften, reverse cold work, relieve stress
◉ temper classifications for steel. Answer: temper and harness are
affected by the method of rolling and annealing. metal is work hard and
it rolled while cold producing a much stiffer steel. double produced
(DR) steal it is rolled once, annealed and then cold rolled again.
◉ steel. Answer: low carbon steel = blackplate
this is converted into tinplate or tin-free steel
tinplating made by electroplating blackplate with a thin layer of tin
◉ tin and coating. Answer: provides good corrosion resistance
all fruits and veggies at in tinplate steel cans
2026 QUESTIONS WITH SOLUTIONS GRADED
A+
◉ disadvantages of metal. Answer: high cost for setting up production,
not a flexible process when considering size
◉ background. Answer: started with napoleon needing food preservation
for his army, first can was glass.
metal can made by hand using tinplating, both ends soldered to the body,
1 inch hole at top. drawing and ironing made aluminum use possible
because aluminum can't be welded
◉ Types of materials. Answer: metals - aluminum and steel
ceramics - glass, brick, concrete
plastics - polymers, rubber, wood
◉ general properties of metal. Answer: strength to weight, stiff, tough,
hard, ductile, conductive, barrier, machinability, reusable, high cost
, ◉ stiffness, toughness, ductile, brittle, permeability. Answer: s - measure
of how easy it is to stretch/bend
t - how much energy a material can absorb without breaking
d - material that can stretch a lot before rupture
b - deform very little before they break
p - how easily gas moves through
◉ alloying, cold working, annealing. Answer: all - add elements
c - deform at room temps, forging, drawing
ann - best to soften, reverse cold work, relieve stress
◉ temper classifications for steel. Answer: temper and harness are
affected by the method of rolling and annealing. metal is work hard and
it rolled while cold producing a much stiffer steel. double produced
(DR) steal it is rolled once, annealed and then cold rolled again.
◉ steel. Answer: low carbon steel = blackplate
this is converted into tinplate or tin-free steel
tinplating made by electroplating blackplate with a thin layer of tin
◉ tin and coating. Answer: provides good corrosion resistance
all fruits and veggies at in tinplate steel cans
