In permanent mould casting method

A Molten metal is poured in a metallic mould, retained in the mould long enough for the outer skin to solidify and finally mould is turned over to remove molten metal still in molten condition
B Molten metal is poured and allowed to solidify while the mould is revolving
C Molten metal is forced into mould under high pressure
D None of the above

Correct Answer: None of the above

Permanent mold casting is a metal casting process that employs reusable molds , usually made from metal.
The most common process uses gravity to fill the mold, however gas pressure or a vacuum are also used.
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Related Questions

When the molten metal is fed in the cavity of a metallic mould by gravity, the method of casting is known as
A Die casting method
B Slush casting method
C Permanent mould casting method
D Centrifugal casting method
The centrifugal casting method, is used for casting articles of
A Symmetrical shape about vertical axis
B Symmetrical shape about horizontal axis
C Irregular shape
D Nonferrous metal only
In continuous casting of liquid steel, the mould is made of
A water cooled steel
B water cooled copper
C refractory oxide
D silicon carbide
The primary purpose of a sprue in a casting mould is to
A Feed the casting at a rate consistent with the rate of solidification
B Act as a reservoir for molten metal
C Feed molten metal from the pouring basin to the gate
D Help feed the casting until all solidification takes place
A casting defect which results in general enlargement of a casting is known as
A Shift
B Sand wash
C Swell
D Scab
A casting defect which occurs near the ingates as rough lumps on the surface of a casting is known as
A Shift
B Sand wash
C Swell
D Scab
The method that cannot be used for removing permanent hardness of water is
A adding sodium carbonate
B distillation
C adding caustic soda
D boiling
The casting method adopted for ornaments and toys of nonferrous alloys, is
A Permanent mould casting
B Slush casting
C Die casting
D Centrifugal casting
In a centrifugal casting method
A Core is made of sand
B Core is made of ferrous metal
C Core is made of nonferrous metal
D No core is used
In average work, the tolerance produced by investment casting method is
A ±0.05 mm
B +0.2 mm
C +05 mm
D +1 mm

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