Which of the following is the anti-penetration material introduced in the moulding sand?
A.Coad dust
B.Powdered quartz
C.Black oil
D.all of the above
Category: Foundry Technology Mcqs
Pit furnace can be used for the melting of
A.cast iron
B.aluminium
C.brass
D.any of the above
Addition of saw dust to moulding sand increases its
A.gas permeability
B.refractoriness
C.cohesiveness
D.all of the above
As a result of melting of cast iron in cupola, which of the following constituent undergoes least change in its percentage?
A.Silicon
B.Sulphur
C.Manganese
D.Phosphorous
First step in reclaiming the moulding and core sand is
A.addition of moisture
B.reproportioning of binder
C.separation of metal particles
D.any of the above
Which of the following is used to increase refractoriness of sand?
A.Graphite
B.Silica flour
C.Iron free zirconium
D.all of the above
Which of the following defect is likely to occur due to improper design of gatting system?
A.Shrinkage
B.Porosity
C.Mould erosion
D.any of the above
Inoculants are added to aluminium mainly for
A.grain refinement
B.directional solidification
C.purification
D.all of the above
In investment casting the pattern is made of
A.wood
B.urea formaldehyde
C.wax
D.none of the above
Swab is used for
A.applying water to the mould around the edge of the pattern
B.shaking pattern to facilitate its with drawl from the mould
C.repairing and finishing of mould
D.none of the above
