Chromium when added as an alloying element to steels
A.Softens the material
B.Refines the grain structure
C.Increases corrosion resistance
D.Increases red hardness
E.Improves mechanical properties
Category: Engineering Materials Mcqs
Sheradising process is used for
A.Heat treatment of steels
B.Heat treatment of high speed steels
C.Machining metals
D.Cold working on metals
E.Surface coating
Figure of merit is used to
A.compare the efficiency of chermoelectric materials
B.measure the extent of doping of intrinsic semi-conductors
C.compare the extent of purity of semi-seonuctor materials
D.None of the above
The electrical resistance of a semi-conductor
A.Increases with temperature
B.Decreases with temperature
C.Does not change with temperature
The ability of material to absorb energy when deformed elastically and to return it when unloaded is called
A.Hardness
B.Fatigue strength
C.Creep
D.Toughness
E.Resilience
Which of the following has the highest malleability?
A.Cast iron
B.Copper
C.Aluminium
D.Lead
E.Brass
Which one of the following is usually most ductile?
A.Hexagonal close packed lattice
B.Body centred cubic lattice
C.Face centred cubic lattic
D.Combination of (A) and (C) above
E.None of the above
Within elastic limits
A.Load is less
B.Load is gradually applied
C.Load is static
D.Deformation is proportional to the load
E.Deformation is permanent
Which one is different from the others in press work
A.Embossing
B.Bulging
C.Cupping
D.Tube forming
E.Notching
The process of shaping thin metals by pressing it against form while it is rotating is known as
A.Pressing
B.Bending
C.Trimming
D.Extruding
E.Metal spinning
