A.the product surface is smooth and clean without the parting line
B.there is no need of air venting
C.there is no restriction of material, any material that can be poured can be cast
D.the heat loss from molten metal is fast as the mould is metallic
A.Backing sand
B.Parting sand
C.Facing sand
D.all of the above
A.permanent mould casting
B.semi permanent mould casting
C.pressed casting
D.none of the above
A.cast iron
B.brass
C.aluminium
D.all of the above
A.gypsum plaster
B.slacked lime
C.lime + cement
D.any of the above
A.improve strength
B.reduce wear resistance
C.increase machinability
D.all of the above
A.increass as the section thickness of casting increases
B.decreases as the section thickness of casting increases
C.is independent of section thickness
A.channel sections
B.corrugated forms
C.ribs
D.any of the above
A.basic slags
B.acid slags
C.alkali compounds
D.all of the above
A.Minimum contraction and expansion due to temperature variations
B.High electrical conductivity
C.Long life
D.Heat insulation
