Category: Materials of Construction Mcqs

A.an alloy
B.an element which exhibits properties of metal and non-metal both
C.highly electronegative
D.highly electropositive

A.Rusting of iron can be stopped by carbon dioxide
B.Rusting of iron takes place in moist air
C.Rusting of iron produces hydrated iron (III) oxide
D.Rusting of iron is electrochemical in nature

A.the temporary distortion of a material under the action of applied stress
B.the permanent distortion of a material under the action of applied stress
C.related to plastics
D.none of the above

A.when molten pig iron is allowed to cool gradually
B.when molten pig iron is chilled suddenly
C.when white cast iron is subjected to slow prolonged heating
D.from nodular cast iron

A.18% Cr 8% Ni 0.08%C (max)
B.8% Cr 18% Ni 0.08%C (max)
C.6% Cr 18% Ni 0.08%C (max)
D.18% Cr 36% Ni 0.08%C (max)

A.Alloys containing copper may be white
B.A soft metal may be hardened by alloying it with another metal or non-metal
C.Silver-plated copper articles contain an alloy of copper and silver
D.Alloys containing carbon are grey or black

A.rapid oxidation
B.slow oxidation
C.rapdi hydration
D.none of the above

A.involves exchange of electrons in electrochemical corrosion only
B.involves exchange of electrons in chemical corrosion only
C.involves exchange of electrons both in electrochemical and chemical corrosion only
D.is a physical phenomenon

A.iron vanadium tungsten
B.iron molybdenum tungsten
C.iron nickel cobalt
D.iron vandadium molybdenum

A.reduced
B.decomposed
C.oxidised
D.changed in a fine powder