Carbon in iron is an example of__________________?
(A) substitutional solution
(B) interstitial solid solution
(C) intermetallic compounds
(D) all of the above
(D) none of the above.
Materials after cold working are subjected to following process to relieve stresses__________________?
(A) hot working
(B) tempering
(C) normalising
(D) annealing
(D) special heat treatment
Hardness of martensite is about___________________?
(A) RC 65
(B) RC 48
(C) RC 57
(D) RC 80
(D) RC 32
Process of austempering results in__________________?
(A) formation of bainite structure
(B) carburised structure
(C) martenistic structure
(D) lamellar layers of carbide distributed throughout the structure
(D) relieving of stresses throughout a component
Induction hardening is the process of_____________________?
(A) hardening surface of workpiece to ob-tain hard and wear resistant surface
(B) heating and cooling rapidly
(C) increasing hardness throughout
(D) inducing hardness by continuous process
(D) hardening core
Weld decay is the phenomenon found with _________________?
(A) cast iron
(B) mild steel
(C) non-ferrous materials
(D) wrought iron
(D) stainless steel
Hardness of upper bainite (acicular structure) is about___________________?
(A) RC 65
(B) RC 48
(C) RC 57
(D) RC 80
(D) RC 32.
Brass (alloy of copper and zinc) is an example of__________________?
(A) substitutional solid solution
(B) interstitial solid solution
(C) intermetallic compounds
(D) all of the above
(D) none of the above
Argentite is the principal ore or raw material for _________________?
(A) aluminium
(B) tin
(C) zinc
(D) lead
(D) silver
Which is false statement about normalizing. Normalizing is done to _________________?
(A) refine grain structure
(B) reduce segregation in casting
(C) improve mechanical properties
(D) induce stresses-
(D) relieve internal stresses