An example of amorphous material is____________?
A. zinc
B. lead
C. silver
D. glass
E. brass
An example of amorphous material is____________? Read More »
Engineering Materials A. zinc
B. lead
C. silver
D. glass
E. brass
An example of amorphous material is____________? Read More »
Engineering Materials A. electroplating
B. cyaniding
C. induction hardening
D. nitriding
E. flame hardening
Which is false statement about case hardening. Case hardening is done by_______________? Read More »
Engineering Materials A. improves wear resistance, cutting ability and toughness
B. refines grain size and produces less tendency to carburisation, improves corrosion and heat resistant properties
C. improves cutting ability and reduces hardenability
D. gives ductility, toughness, tensile strength and anticorrosion properties
E. makes steel hard
Chromium in steel_________________? Read More »
Engineering Materials A. brass
B. cast iron
C. aluminium
D. steel
E. non-ferrous alloys.
Cemented carbide tools are not found to be suitable for cutting_______________? Read More »
Engineering Materials A. cobalt
B. nickel
C. vanadium
D. iron
E. carbon
Which of the following is the binding material in cemented carbides___________________? Read More »
Engineering Materials A. improve machinability
B. improve ductility
C. improve toughness
D. release stresses
E. reduce hardness and brittleness
Which is false statement about tempering. Tempering is done to_______________? Read More »
Engineering Materials A. promotes decarburisation
B. provides high hot hardness
C. forms very hard carbides and thus in-creases wear resistance
D. promotes retention of austenite
E. increases toughness
Vanadium in high speed steels__________________? Read More »
Engineering Materials A. RC 65
B. RC 48
C. RC 57
D. RC 80
E. RC 32
Hardness of lower bainite (tempered martensite) is about________________? Read More »
Engineering Materials A. relieve stresses
B. harden steel slightly
C. improve machining characteristic
D. soften material
E. permit further cold working
Which is false statement about annealing. Annealing is done to________________? Read More »
Engineering Materials A. substitutional solution
B. interstitial solid solution
C. intermetallic compounds
D. all of the above
E. none of the above.
Carbon in iron is an example of__________________? Read More »
Engineering Materials