The disadvantage of hot blast cupola is
A.low coke consumption
B.reduced silicon loss
C.reduced output silicon loss
D.all of the above
Category: Foundry Technology Mcqs
Choose the correct statement in respect of die casting machine
A.In hot chamber die casting machine the metal is melted in the machine itself
B.In cold chamber die casting machine metal of low melting point is cast
C.In cold chamber die casting machine there is no need to cool the die from outside
D.none of the above
Sand is broadly specified by
A.grain size
B.colour
C.moisture content
D.all of the above together
A blast furnace operates continuously for
A.hours together
B.days together
C.weeks together
D.months together
The advantage of permanent mould casting is
A.reduced labour charges
B.reduced mould cost
C.dense, fine grained structure
D.all of the above
Magnesium aluminium alloys are grain refined by addition of
A.sulphur
B.manganese
C.carbon
D.tin
Polystyrene often used as a consumable pattern material has a relative density of
A.20 to 25 kg/m3
B.120 to 125 kg/m3
C.1120 to 1125 kg/m3
D.2240 to 2500 kg/m3
In low temperature die casting the metals whose alloys are cast are
A.aluminium and zinc
B.zinc and copper
C.copper, zinc and lead
D.none of the above
Which of the following is used to obtain fine surface finish in ferrous castings?
A.Ground pitch
B.Sea coal
C.Gilsonite
D.any of the above
In die casting
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
