Which allotropic form of iron is magnetic at room temperature?
A.Alpha iron
B.Beta iron
C.Gamma iron
D.Delta iron
E.All of the above
Category: Metallurgy Mcqs
Approximate Brinell Hardness number for talc is
A.1
B.2
C.5 — 10
D.20 — 30
E.50 — 80
The crystal structure of most of the common metals is
A.Hexagonal
B.Cubic
C.Orthorhombic
D.Any of the above
E.None of the above
The process of providing zinc coating on steel pipes is known as
A.Pickling
B.Spheroidising
C.Cold working
D.Galvanising
E.Blistering
In tool steel the sulphur content is usually not allowed to exceed
A.0.001 percent
B.0.035 percent
C.0.35 percent
D.3.5 percent
E.5 percent
The flux used in brazing is usually
A.Common salt
B.Lime
C.Borax
D.Alum
E.None of the above
Percentage of carbon is least in case of
A.Pig iron
B.Cast iron
C.Malleable iron
D.Wrought iron
E.Steel
Brass in an alloy of
A.Copper and tin
B.Copper and zinc
C.Copper and lead
D.Copper and nickel
E.Copper and aluminium
The process for steel making used at TISCO, Jamshedpur is
A.L-D process
B.Duplex process
C.Electric process
D.Bessemmer process
E.Open hearth process
In eddy current heating of steel, if the depth of heating is to be increased
A.Frequency must be high
B.Frequency must be low
C.Some resisting material must be applied on the surface of article to be heated
D.Time of heating should be high
E.Voltage should be high
