A defect in castings in which a discontinuity is formed due to the imperfect fusion of two streams of metal in the mould cavity is known as
A.hot tears
B.cold shut
C.scabs
D.drops
Category: Foundry Technology Mcqs
Of the following metals, the pouring rate should be minimum for
A.steel
B.aluminium
C.brass
D.cast iron
The property of the foundry sand which enables it to adhere to the surface of other materials is termed
A.Cohesiveness
B.Adhesiveness
C.Either of (A) or (B)
The disadvantage in using wood as the material for pattern making is
A.its low cost
B.its different strength along the grains and across the grains
C.it gets warped when not stored properly
D.it is lighter than the metal to be cast
Investment casting can be used for which of the following alloys:
A.cobalt based satellite
B.Tool steels
C.Hynes super alloys
D.All of the above
Non-uniform distribution of alloying components, inclusions and impurities in an ingot or casting are known as
A.segregation
B.ageing
C.innoculation
D.bleeding
The draft allowance to be provided on a pattern depends on
A.the length of the vertical side of the pattern to be extracted
B.the intricacy of the pattern
C.the method of moulding
D.all of the above
Refractoriness in the moulding sand is due to the presence of
A.Clay
B.Silica
C.Additives and Binders
Which of the following process is used for melting of steel?
A.L D process
B.Kaldo process
C.Duplex process
D.All of the above
Heating of core is necessary while using which of the following core binder?
A.Phenol formaldehyde resin
B.Phenolic alcohols
C.Furan-base binder
D.All of the above
