Which of the following operations improve wear resistance and mechanical properties of castings?
A.Shot peening
B.Chilling
C.Nitriding
D.All of the above
Category: Foundry Technology Mcqs
The function of riser is
A.to provide an opening through which molten metal is poured
B.to give an indication that mould is filled
C.to allow the heat of molten metal to dissipate to atmosphere
D.to supply molten metal to casting as it tends to contract during solidification
The amount of machining allowance on castings depends on
A.size and shape of the casting
B.casting orientation
C.characteristics of the metal
D.all of the above
The cross-section of a sprue
A.square
B.circular
C.rectangular
D.any of the above
A mould which has good erosion resistance to metal flow and is also collapsible is
A.green sand mould
B.skin dry sand mould
C.dry sand mould
D.none of the above
Cores are made from core sand mixed with the binder which may be
A.linseed oil
B.turpentine
C.cement
D.none of the above
Pattern draft for internal surfaces is (in mm/m)
A.10 — 30
B.40 – 70
C.50 – 80
If dross and slag along with the liquid metal reach the mould cavity they produce the defect known as_______________?
A. Misrun
B. Inclusions
C. Blow holes
D. All of the above
Slag and dross can be removed by ________________?
A.skimming from the molten metal
B.using bottom pouring ladle
C.using pouring basin in place of a pouring cup
D.any of the above
The methods of casting for producing ornamental pieces are ____________?
A.pressed and slush casting
B.slush and gravity casting
C.gravity and semi permanent mould casting
D.none of the above
Continue reading “The methods of casting for producing ornamental pieces are ____________?”
