Galena is the ore for
A.Aluminium
B.Copper
C.Zinc
D.Lead
E.Germanium
Category: Engineering Materials Mcqs
A bot in cupola is
A.A flux
B.A part of coupla
C.A kind of cast iron
D.A clay plug to close tap hole
E.A defect in casting
The tendency for brittle fracture increases with
A.Increasing temperature
B.Decreasing strain rate
C.Appreciable plastic deformation before fracture
D.Appreciable plastic deformation during propagation of the crack
E.None of the above
The furnace used for castings of cast iron in a foundry shop is known as
A.Blast furnace
B.Reverberatory furnace
C.Electric induction furnace
D.Cupola
E.Muffle furnace
In drop forging the forging is done by
A.Dropping the workpiece at high velocity
B.Dropping the hammer at high velocity
C.Dropping the die with hammer at high velocity
D.Dropping a weight on hammer to produce requisite impact
E.None of the above
Moh’s scale of hardness has the range
A.1–3
B.1–5
C.5–10
D.1–10
E.10–15
The process of pulling a rod through series of decreasing diameters is known as
A.Staking
B.Stretch forming
C.Metal spinning
D.Trimming
E.Wire drawing
Toughness of a material means
A.Strength
B.Fatigue resistance
C.Stress relieving
D.Machinability
E.Softening
Accounstical materials
A.Absorb sound
B.Reflect sound
C.Create sound
Ferromagnetic alpha iron change to paramagnetic alpha iron at
A.1650?C
B.1500?C
C.1400?C
D.910?C
E.77?C
