The order of surface finish possible in die castings is
A.0.0008 microns
B.0.008 microns
C.0.08 microns
D.0.8 microns
Category: Foundry Technology Mcqs
In furan process, furan resins are primarily used as
A.binders
B.chemicals for exothermic reactions
C.fluxes
D.none of the above
In case of cored aluminium castings, the contraction allowance is
A.more than the normal allowance
B.less than the normal allowance
C.same as the normal allowance
Pig iron is obtained from iron ore, in a blast furnace by the process of
A.oxidation
B.reduction
C.carbonation
D.desulphurisation
Investment casting finds application in all of the following EXCEPT:
A.Milling cutters
B.Gold ornaments
C.Jet engine nozzles
D.Buckets for superchargers
Clay used for foundry sand should be
A.kaolinite
B.montmorillonite
C.illite
D.any of the above
According to Chvorinov’s equation, the solidification time of castings is
A.directly proportional to the volume of the castings
B.Directly proportional to square of the volume of the casting
C.inversely proportional to square of the volume of the casting
D.inversely proportional to the volume the casting
For annealing of aluminium it is heated to
A.325?C
B.425?C
C.525?C
D.625?C
Which of the following is measuring and layout tool?
A.Trammels
B.Combination square
C.Marking gauge
D.all of the above
Pattern used in foundry shop is
A.Equal in size to the casting
B.Somewhat larger in size than the casting
C.Somewhat smaller in size than the casting
