Compared to grey cast iron white cast iron is
A.very hard
B.very brittle
C.more durable
D.all of the above
Category: Materials of Construction Mcqs
The property of metals olloys which describes its ability to be drawn into wires is known as
A.tenacity
B.dustility
C.porosity
D.malleability
In martensitic stainless steel the difference between the chromium percentage and seventeen times the carbon content is
A.less than 12.5%
B.greater than 12.5 %
C.greater than 24%
D.less than 18%
In bronze copper is alloyed with
A.Zn
B.Sn
C.Be
D.AI
In a face-centred cubic lattice there are
A.1 molecule per unit cell
B.2 molecules per unit cell
C.4 molecules per unit cell
D.8 molecules per unit cell
Stainless steel in addition to iron and carbon contains
A.sluminium
B.zinc
C.lead
D.chromium
In steel carbon is
A.present wholly in the combined form
B.mostly present in the free state as graphite
C.not desirable
D.none of the above
Iron pipes lying under acidic soil are often attached to blocks of magnesium for protection from rusting. Magnesium offers protection to iron against corrosion because it
A.is lighter than air
B.is more readily converted into positive irons
C.prevents air from reaching the surface of iron
D.forms a corrosion-resistant alloy with iron
The process of protection of iron by coating with zinc is called
A.tempering
B.galvanizing
C.nitriding
D.smelting
Brass is composed of
A.Cu?Zn
B.Cu?Sn
C.Sn?Zn
D.AI?B
