In nodular iron, graphite is present in the form of
A.Flakes
B.Needles
C.Powder
D.Spheroids
E.Prisms
Category: Metallurgy Mcqs
Attack of steel is increased by
A.Salt solution below a paint coat
B.Invisible moisture film present prior to painting
C.Graphite in the priming coat
D.Loose rust and partially removed mill scale
E.All of the above
Constantan is an alloy containing
A.Copper and zinc
B.Copper and nickel
C.Lead and zinc
D.Zinc and nickel
E.Lead and copper
The flux used in blast furnace while melting iron ore is
A.Carbon
B.Oxygen
C.Sodium chloride
D.Lime stone
E.Bauxite
In which process steel is heated below the critical temperature
A.Annealing
B.Normalizing
C.Hardening
D.Temperting
E.Carburizing
Plasticisers are added to plastic compounds to
A.Provide a protective layer
B.Improve resistance to acids
C.Improve resistance to alkalies
D.Increase tensile strength
E.Improve softness and flexibility
Ferrite is
A.Amorphous and brittle
B.Soft and ductile
C.Hardenable under rapid cooling
D.Present in abundance in high carbon steel
The coordination number of NaCl is
A.2
B.3
C.6
D.8
E.9
Just as strong is opposite of weak likewise elastic is opposite of
A.Hard
B.Soft
C.Rigid
D.Inelastic
E.Ductile
