Materials Final Exam questions and
answers already passed
Applications for zinc include
+ Die casting alloy
+Alloying element in brass
+High temperature applications
+Corrosion resistant coating for steel
+Light-weight applications
+Main course for banquets - ANS ✔+Die casting alloy
+Alloying element in brass
+Corrosion resistant coating for steel
All steels solidify with some eutectic. T or F - ANS ✔False
Select all the elements what will increase the hardenability of a steel.
+Chromium
+Carbon
+Manganese
+Vanadium
+Nickel
+Molybdenum
+Tungsten - ANS ✔All of the above
The density of steel is significantly lower than that of aluminum. T or F - ANS ✔False
,What is the carbon concentration range for steel alloys?
+Between 0.02 and 6.69 wt% carbon
+Above 2.11 wt% carbon
+Below 2.11 wt% carbon
+Between 0.77 and 6.69 wt% carbon - ANS ✔Below 2.11 wt% carbon
Ferrous alloys are easy to recycle because
+They are inexpensive
+They corrode easily
+They are magnetic
+They have a high density - ANS ✔They are magnetic
A low alloy steel has less than about 8 wt% total of alloying elements. T or F - ANS ✔True
Rank the following types of iron from low to high ductility. (1 is the lowest ductility and 4 is the
highest ductility).
+White iron
+Gray iron
+Compacted graphite iron (CG iron or CGI)
+Ductile iron (Spheroidal graphite iron or SG iron or DI) - ANS ✔+White iron - 1
+Gray iron - 2
+Compacted graphite iron (CG iron or CGI) - 3
+Ductile iron (Spheroidal graphite iron or SG iron or DI) - 4
The recycling of metal reduces its cost. T or F - ANS ✔True
, All cast irons solidify with some eutectic. T or F - ANS ✔True
It costs more to manufacture aluminum than steel. T or F - ANS ✔True
Select all of the following that are true for super alloys.
+They are cobalt, nickel and iron-based.
+They are designed to have great properties while being simultaneously inexpensive.
+They are alloyed to be used at high temperatures.
+They are usually precipitation hardened.
+They are alloyed to be used in corrosive environments.
+They taste super! - ANS ✔+They are cobalt, nickel and iron-based.
+They are alloyed to be used at high temperatures.
+They are usually precipitation hardened.
+They are alloyed to be used in corrosive environments.
Select all of the following that are correct for titanium alloys
+It can be used at higher temperatures than aluminum alloys
+It has excellent biocompatibility
+It has a lower density than aluminum alloys
+It has a low density than ferrous alloys - ANS ✔+It can be used at higher temperatures than
aluminum alloys
+It has excellent biocompatibility
+It has a lower density than ferrous alloys
Which metal alloy type is used the most?
answers already passed
Applications for zinc include
+ Die casting alloy
+Alloying element in brass
+High temperature applications
+Corrosion resistant coating for steel
+Light-weight applications
+Main course for banquets - ANS ✔+Die casting alloy
+Alloying element in brass
+Corrosion resistant coating for steel
All steels solidify with some eutectic. T or F - ANS ✔False
Select all the elements what will increase the hardenability of a steel.
+Chromium
+Carbon
+Manganese
+Vanadium
+Nickel
+Molybdenum
+Tungsten - ANS ✔All of the above
The density of steel is significantly lower than that of aluminum. T or F - ANS ✔False
,What is the carbon concentration range for steel alloys?
+Between 0.02 and 6.69 wt% carbon
+Above 2.11 wt% carbon
+Below 2.11 wt% carbon
+Between 0.77 and 6.69 wt% carbon - ANS ✔Below 2.11 wt% carbon
Ferrous alloys are easy to recycle because
+They are inexpensive
+They corrode easily
+They are magnetic
+They have a high density - ANS ✔They are magnetic
A low alloy steel has less than about 8 wt% total of alloying elements. T or F - ANS ✔True
Rank the following types of iron from low to high ductility. (1 is the lowest ductility and 4 is the
highest ductility).
+White iron
+Gray iron
+Compacted graphite iron (CG iron or CGI)
+Ductile iron (Spheroidal graphite iron or SG iron or DI) - ANS ✔+White iron - 1
+Gray iron - 2
+Compacted graphite iron (CG iron or CGI) - 3
+Ductile iron (Spheroidal graphite iron or SG iron or DI) - 4
The recycling of metal reduces its cost. T or F - ANS ✔True
, All cast irons solidify with some eutectic. T or F - ANS ✔True
It costs more to manufacture aluminum than steel. T or F - ANS ✔True
Select all of the following that are true for super alloys.
+They are cobalt, nickel and iron-based.
+They are designed to have great properties while being simultaneously inexpensive.
+They are alloyed to be used at high temperatures.
+They are usually precipitation hardened.
+They are alloyed to be used in corrosive environments.
+They taste super! - ANS ✔+They are cobalt, nickel and iron-based.
+They are alloyed to be used at high temperatures.
+They are usually precipitation hardened.
+They are alloyed to be used in corrosive environments.
Select all of the following that are correct for titanium alloys
+It can be used at higher temperatures than aluminum alloys
+It has excellent biocompatibility
+It has a lower density than aluminum alloys
+It has a low density than ferrous alloys - ANS ✔+It can be used at higher temperatures than
aluminum alloys
+It has excellent biocompatibility
+It has a lower density than ferrous alloys
Which metal alloy type is used the most?
