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## Marks 1

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In carbon dioxide molding process, the binder used is
GATE PI 2017
Match the items in the first column to their functions in the second column. ...
GATE PI 2015
Chills are used in casting moulds to
GATE PI 2014
A cube shaped casting solidifies in $$5$$ min. The solidification time in min for a cube of the same material, which is ...
GATE PI 2013
Which of the following casting processes uses expandable pattern and expandable mold
GATE PI 2011
In sand casting fluidity of the molten metal increases with
GATE PI 2011
Solidification time of a metallic alloy casting is
GATE PI 2010
Hot chamber die casting is NOT suited for
GATE PI 2009
In hollow cylindrical parts made by centrifugal casting, the density of the part is
GATE PI 2008
Cold shut is a defect in casting due to
GATE PI 2006
An expandable pattern is used in
GATE PI 2005
Wood flour is added to core sand to improve:
GATE PI 2004
Which one of the following is NOT a property of a sand mold?
GATE PI 2003
Shell molding is an investment casting process $$(T/F)$$
GATE PI 1995
Bentonite is commonly used bonding material for dry sand cores
GATE PI 1994
Chaplets are placed between mold in order to
GATE PI 1992
Investment casting uses ...... A........... as pattern material and is preferred for small parts with .......... B.........
GATE PI 1992
Increase in carbon content in plain carbon steels raise its
GATE PI 1992
The primary function of a riser is to
GATE PI 1992
Investment casting uses ......... (wax / resin coated sand) as pattern material and is preferred for small parts with .....
GATE PI 1992
Low permeability molds and low pouring temperature of the molten metal causes ......................... defect in castin...
GATE PI 1991
Pressure die casting deals with casting metals of relatively ............. A ............. melting point and provides .....
GATE PI 1991
Ceramic slurry is used in making the molds for
GATE PI 1991
The optimum pouring time for a casting depends on several factors. One important factor among them is
GATE PI 1991
The problem of shrinkage cavity is more likely to occur while casting ......... A ............ B.......... a chill block...
GATE PI 1990
For casting of turbine blades made of high temp and high strength alloys, the most suitable process is
GATE PI 1990
Green strength in powder metallurgy refers to the strength of
GATE PI 1989
The process by which shell like castings (like toys) are made is
GATE PI 1989
Poor collapsibility of the mold leads to .......... type of casting defect in aluminium castings.
GATE PI 1989
For the same material, powder metallurgy process is superior to casting for
GATE PI 1989
Negative allowance is provided on the pattern to take care of
GATE PI 1989

## Marks 2

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Schematic diagram of pouring basin and sprue of a gating system is shown in the Figure. Depth of molten metal in the pou...
GATE PI 2017
Two cast iron blocks $$P$$ and $$Q,$$ each of $$500$$ $$mm$$ length, have the same cross-sectional area. Block $$P$$ has...
GATE PI 2016
In a metal casting process, molten copper alloy is poured into a sand mould. The level of molten metal in the pouring ba...
GATE PI 2015
For a given volume of a riser, if the solidification time of the molten metal in riser needs to be quadrupled, the surfa...
GATE PI 2014
A mold having dimensions $$100 \times 90 \times 20$$ (all in $$mm$$) is filled with molten metal througgh a gate with he...
GATE PI 2012
In a sand casting process, a sphere and a cylinder of equal volumes are separately cast from the same molten metal under...
GATE PI 2011
During the filling process of a given sand mould cavity by metal through a horizontal runner of circular $$C.S,$$ the fr...
GATE PI 2010
A solid cylinder of diameter $$D$$ and height equal to $$D,$$ and a solid cube of side $$L$$ are being sand cast by usin...
GATE PI 2009
In sand casting of hallow part of lead, a cylindrical core of diameter $$120mm$$ and height $$180mm$$ is placed inside t...
GATE PI 2008
Match the following ...
GATE PI 2007
In a sand casting process, a sprue of $$10mm$$ base diameter and $$250mm$$ height leads to a runner which fills a cubica...
GATE PI 2007
In a sand casting process, a sprue of $$10mm$$ base diameter and $$250mm$$ height leads to a runner which fills a cubica...
GATE PI 2007
A casting of size $$400mm \times 200mm \times 140mm$$ solidifies in $$20min.$$ The solidification time for a casting $$4... GATE PI 2006 A cast steel slab of dimension$$30 \times 20 \times 5\,\,cm$$is poured horizontally using a side riser. The riser is c... GATE PI 2005 The shape factor for a casting in the form of an annular cylinder of outside diameter$$30cm,$$inside diameter$$2...
GATE PI 2005
Match the items of List $${\rm I}$$ (Equipment) with the items of List $${\rm II}$$ (Process) and select the correct ans...
GATE PI 2004
Chapters are placed between mould and core surfaces in order to :
GATE PI 2003
Gating ratio of $$1:2:4$$ is used to design the gating system for magnesium alloy casting. This gating ratio refers to t...
GATE PI 2003
A casting of size $$100\,\,mm \times 100\,\,mm \times 50\,\,mm$$ is required. Assume volume shrinkage of casting $$2.6\%... GATE PI 2003 ... GATE PI 2002 A$$10mm$$thick steel bar is to be horizontally cast with two correctly spaced top risers of adequate feeding capa... GATE PI 2002 Proper gating design in metal casting$$P:$$Influences the freezing range of the melt$$Q:$$Compensates the loss of ... GATE PI 2002 The permeability of molding sand was determined using a saturated$$AFS$$sample by passing$$2000cc$$of air at a gage ... GATE PI 2002 The height of the down sprue is$$175mm$$and its$$CS$$area at the base is$$200\,\,m{m^2}.$$The$$CS$$area of ... GATE PI 2002 Match the cast defect with their cause ... GATE PI 1995 According to Chvorinove's rule, the solidification time of a casting is proportional to [Volume/Surface area]n where$$n...
GATE PI 1994
Manufacturing process $$\,\,\,\,\,\,\,\,\,\,\,\,$$ Property ...
GATE PI 1993
Match the application with type of pattern ...
GATE PI 1992
When there is no room temp change, the total shrinkage allowance on a pattern is INDEPENDENCE OF
GATE PI 1990
Shrinkage allowance on pattern is provided to compensate for shrinkage when
GATE PI 1989
What is the velocity of the steel at the bottom of the sprue if the sprue height is $$30$$ $$cm$$? Assume the frictiona...
GATE PI 1989

## Marks 5

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For true centrifugal casting process with the axis of rotation in horizontal direction, an acceleration of $$75g,$$ wher...
GATE PI 2001
A cylinder of $$150mm$$ diameter &amp; $$200mm$$ height is to be cast with out any riser. The cylinder is moulded entire...
GATE PI 1994
A casting of $$200\,\,mm\,\, \times \,\,100\,\,mm \times 70\,\,mm$$ size solidifies in ten minutes. Estimate solidificat...
GATE PI 1993
If the freezing ratio equal to (casting area/casting volume)/(riser area/riser volume) &amp; the volumetric ratio equal ...
GATE PI 1992
Molten aluminium was poured in a sand mold and the thickness of solid skin formed after $$20$$ seconds and $$50$$ second...
GATE PI 1989

## Marks 6

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Three castings are of the same material, volume and cast under similar conditions. One is a sphere, another is a cube an...
GATE PI 1995
Three castings are of the same material, volume and cast under similar conditions. One is a sphere, another is a cube an...
GATE PI 1995
A rectangular block of steel $$C.S$$ $$100\,\, \times \,\,150mm$$ and $$250mm$$ height is to be cast with out any riser....
GATE PI 1991
A steel plate $$40cm \times 30cm \times 0.3cm$$ is to be cast. The volume shrinkage of steel during solidification is ...
GATE PI 1990

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