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MCQs 1: Carbon in iron is an example of__________________?

substitutional solution interstitial solid solution intermetallic compounds all of the above none of the above
Answer Explanation

MCQs 2: Which is false statement about annealing. Annealing is done to________________?

relieve stresses harden steel slightly improve machining characteristic soften material permit further cold working
Answer Explanation

MCQs 3: Hardness of lower bainite (tempered martensite) is about________________?

RC 65 RC 48 RC 57 RC 80 RC 32
Answer Explanation

MCQs 4: Vanadium in high speed steels__________________?

promotes decarburisation provides high hot hardness forms very hard carbides and thus in-creases wear resistance promotes retention of austenite increases toughness
Answer Explanation

MCQs 5: Which is false statement about tempering. Tempering is done to_______________?

improve machinability improve ductility improve toughness release stresses reduce hardness and brittleness
Answer Explanation

MCQs 6: Which of the following is the binding material in cemented carbides___________________?

cobalt nickel vanadium iron carbon
Answer Explanation

MCQs 7: Cemented carbide tools are not found to be suitable for cutting_______________?

brass cast iron aluminium steel non-ferrous alloys
Answer Explanation

MCQs 8: Chromium in steel_________________?

improves wear resistance, cutting ability and toughness refines grain size and produces less tendency to carburisation, improves corrosion and heat resistant properties improves cutting ability and reduces hardenability gives ductility, toughness, tensile strength and anticorrosion properties makes steel hard
Answer Explanation

MCQs 9: Which is false statement about case hardening. Case hardening is done by_______________?

electroplating cyaniding induction hardening nitriding flame hardening
Answer Explanation

MCQs 10: An example of amorphous material is____________?

zinc lead silver glass brass
Answer Explanation

MCQs 11: Amorphous material is one___________________?

in which atoms align themselves in a geometric pattern upon solidification in which there is no definite atomic structure and atoms exist in a random pattern just as in a liquid which is not attacked by phosphorous which emits fumes on melting none of the above
Answer Explanation

MCQs 12: Which is false statement about normalizing. Normalizing is done to _________________?

refine grain structure reduce segregation in casting improve mechanical properties induce stresses relieve internal stresses
Answer Explanation

MCQs 13: Argentite is the principal ore or raw material for _________________?

aluminium tin zinc lead silver
Answer Explanation

MCQs 14: Brass (alloy of copper and zinc) is an example of__________________?

substitutional solid solution interstitial solid solution intermetallic compounds all of the above none of the above
Answer Explanation

MCQs 15: Hardness of upper bainite (acicular structure) is about___________________?

RC 65 RC 48 RC 57 RC 80 RC 32.
Answer Explanation

MCQs 16: Weld decay is the phenomenon found with _________________?

cast iron mild steel non-ferrous materials wrought iron stainless steel
Answer Explanation

MCQs 17: The surface hardness of the following order is achieved by nitriding operation__________________?

600 VPN 1500 VPN 1000 to 1100 VPN 250 VPN 2000 VPN
Answer Explanation

MCQs 18: The loss of strength in compression with simultaneous gain in strength in tension due to overloading is known as________________?

hysteresis creep visco elasticity Boeschinger effect inelasticity
Answer Explanation

MCQs 19: Cyaniding is the process of________________?

dipping steel in cyanide bath reacting steel surface with cyanide salts adding carbon and nitrogen by heat treatment of steel to increase its surface hardness obtaining cyanide salts making corrosion resistant steel
Answer Explanation

MCQs 20: By severely deforming a metal in a particular direction it becomes _________________?

ductile malleable homogeneous isotropic anisotropic
Answer Explanation

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