Hot spots are generally found in castings
A.having abrupt variation in section
B.with uniform cross-section
C.symmetrical about two axes
D.small in weight but large in volume
A.having abrupt variation in section
B.with uniform cross-section
C.symmetrical about two axes
D.small in weight but large in volume
A.lime stone
B.coke slurry
C.molasses
D.any of the above
A.Cold shuts
B.Rough surfaces
C.Misruns
D.any of the above
A.expands
B.shrinks
C.changes colour
A.casting is shaken while withdrawing from mould
B.the surfaces are lagged with thin strips of wood or leater
C.the castings are cleaned and made smooth
D.to provide draw screws, holes can be drilled and tapped in the castings
A.hastalloy
B.monel metal
C.N-c alloy
D.permalloy
A.1% – 4%
B.2% – 8%
C.5% – 15%
A.cast iron is in the form of broken pieces
B.cast iron requires higher temperature for heating
C.the rate of heating required for melting cast iron connot be provided by electric furnaces
D.It is expensive to use electricity for melting of cast iron
A.liquid stage
B.mushy stage
C.plastic stage
D.solid stage
A.hardness
B.corrosion resistance
C.tensile strength
D.all of the above