Deck 10: Casting Processes and Materials

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Question
Malleable castings are used for

A)boilers
B)Automobiles
C)Elevators
D)all of the above
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Question
All of the following are boring tools EXCEPT

A)Gauge
B)Pinchdog
C)Brace
D)Auger bit
Question
Tempering is generally done to reduce all of the following EXCEPT

A)Hardness
B)Brittleness
C)Tensile strength
D)Ductility
Question
The solidification shrinkage of carbon steel is around

A)0.5 to 1 percent
B)2 to 4 percent
C)8 to 10 percent
D)0.1 to 0.2 percent
Question
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
Question
Magnesium aluminium alloys are grain refined by addition of

A)manganese
B)sulphur
C)carbon
D)tin
Question
The advantage of oxygen enriched cupola is

A)higher temperature of molten iron
B)high efficiency of cupola
C)reduced heat loss in waste gases
D)all of the above
Question
The contraction allowance for pattern depends on

A)composition of the metal
B)method of moulding used
C)pouring temperature
D)all of the above
Question
The advantage of shell moulding is

A)Less sand requirement
B)Process can be used for all cast metals
C)Good accuracy of dimensions
D)All of the above
Question
Providing more than adequate machining allowance

A)reduces machining cost
B)increases machining cost
C)improves the strength of the casting
D)reduces the strength of the casting
Question
As a result of melting in cupola, the percentage of all of the following constituents decreases EXCEPT

A)Sulphur
B)Silicon
C)Phosphorous
D)Carbon
Question
Chaplets are provided to

A)reduce core sag
B)support heavy cores
C)compensate for inadequate coreseats
D)all of the above
Question
Polystyrene often used as a consumable pattern material has a relative density of

A)20 to 25 kg/m3
B)2240 to 2500 kg/m3
C)120 to 125 kg/m3
D)1120 to 1125 kg/m3
Question
For stress relieving, castings are

A)heated to low temperature and furnace cooled
B)heated to a temperature around melting point and slowly cooled
C)heated in stages and also cooled in stages
D)heated by flame and air cooled
Question
Gated patterns are normally used for

A)castings for light metals
B)castings having several hollow spaces
C)mass production of small castings
D)production of castings which do not require machining
Question
Casting made in relatively simple shapes and designed for subsequent fabrication by rolling, forging etc. are known as

A)rolls
B)pigs
C)ingots
D)chills
Question
Which of the following is used as protective admixture in moulding sand for magnesium castings?

A)Boric acid
B)Sublimed sulphur
C)Fluoric additives
D)Any of the above
Question
For sterite refractory bricks are attacked by

A)basic slags
B)acid slags
C)alkali compounds
D)all of the above
Question
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
Question
The property of sand to withstand the high temperature of the molten metal without fusing or breakdown is known as

A)porosity
B)refractoriness
C)cohesiveness
D)adhesiveness
Question
Addition of nickel to cast iron increases

A)hardness
B)corrosion resistance
C)tensile strength
D)all of the above
Question
A casting process which can produce hollow cylinder without use of core is

A)permanent mould casting
B)semi permanent mould casting
C)pressed casting
D)none of the above
Question
The advantage of centrifugal casting is

A)dense castings
B)elimination of cores
C)mass production with reduced rejection possible
D)all of the above
Question
All of the following are non-destructive method of testing the castings EXCEPT

A)Dye penetrant inspection
B)Pressure test
C)Ultrasonic test
D)Tensile test
Question
Which of the following is not necessarily the characteristic of investment casting?

A)No disfiguring parting line as found on castings made by cope and drag methods
B)Extreme dimensional accuracy
C)Excellent surface finish
D)Low cost
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Deck 10: Casting Processes and Materials
1
Malleable castings are used for

A)boilers
B)Automobiles
C)Elevators
D)all of the above
all of the above
2
All of the following are boring tools EXCEPT

A)Gauge
B)Pinchdog
C)Brace
D)Auger bit
Brace
3
Tempering is generally done to reduce all of the following EXCEPT

A)Hardness
B)Brittleness
C)Tensile strength
D)Ductility
Ductility
4
The solidification shrinkage of carbon steel is around

A)0.5 to 1 percent
B)2 to 4 percent
C)8 to 10 percent
D)0.1 to 0.2 percent
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5
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
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k this deck
6
Magnesium aluminium alloys are grain refined by addition of

A)manganese
B)sulphur
C)carbon
D)tin
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k this deck
7
The advantage of oxygen enriched cupola is

A)higher temperature of molten iron
B)high efficiency of cupola
C)reduced heat loss in waste gases
D)all of the above
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Unlock Deck
k this deck
8
The contraction allowance for pattern depends on

A)composition of the metal
B)method of moulding used
C)pouring temperature
D)all of the above
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k this deck
9
The advantage of shell moulding is

A)Less sand requirement
B)Process can be used for all cast metals
C)Good accuracy of dimensions
D)All of the above
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10
Providing more than adequate machining allowance

A)reduces machining cost
B)increases machining cost
C)improves the strength of the casting
D)reduces the strength of the casting
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11
As a result of melting in cupola, the percentage of all of the following constituents decreases EXCEPT

A)Sulphur
B)Silicon
C)Phosphorous
D)Carbon
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k this deck
12
Chaplets are provided to

A)reduce core sag
B)support heavy cores
C)compensate for inadequate coreseats
D)all of the above
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k this deck
13
Polystyrene often used as a consumable pattern material has a relative density of

A)20 to 25 kg/m3
B)2240 to 2500 kg/m3
C)120 to 125 kg/m3
D)1120 to 1125 kg/m3
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k this deck
14
For stress relieving, castings are

A)heated to low temperature and furnace cooled
B)heated to a temperature around melting point and slowly cooled
C)heated in stages and also cooled in stages
D)heated by flame and air cooled
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k this deck
15
Gated patterns are normally used for

A)castings for light metals
B)castings having several hollow spaces
C)mass production of small castings
D)production of castings which do not require machining
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Unlock Deck
k this deck
16
Casting made in relatively simple shapes and designed for subsequent fabrication by rolling, forging etc. are known as

A)rolls
B)pigs
C)ingots
D)chills
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k this deck
17
Which of the following is used as protective admixture in moulding sand for magnesium castings?

A)Boric acid
B)Sublimed sulphur
C)Fluoric additives
D)Any of the above
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Unlock Deck
k this deck
18
For sterite refractory bricks are attacked by

A)basic slags
B)acid slags
C)alkali compounds
D)all of the above
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Unlock Deck
k this deck
19
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
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Unlock Deck
k this deck
20
The property of sand to withstand the high temperature of the molten metal without fusing or breakdown is known as

A)porosity
B)refractoriness
C)cohesiveness
D)adhesiveness
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Unlock Deck
k this deck
21
Addition of nickel to cast iron increases

A)hardness
B)corrosion resistance
C)tensile strength
D)all of the above
Unlock Deck
Unlock for access to all 25 flashcards in this deck.
Unlock Deck
k this deck
22
A casting process which can produce hollow cylinder without use of core is

A)permanent mould casting
B)semi permanent mould casting
C)pressed casting
D)none of the above
Unlock Deck
Unlock for access to all 25 flashcards in this deck.
Unlock Deck
k this deck
23
The advantage of centrifugal casting is

A)dense castings
B)elimination of cores
C)mass production with reduced rejection possible
D)all of the above
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Unlock for access to all 25 flashcards in this deck.
Unlock Deck
k this deck
24
All of the following are non-destructive method of testing the castings EXCEPT

A)Dye penetrant inspection
B)Pressure test
C)Ultrasonic test
D)Tensile test
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Unlock for access to all 25 flashcards in this deck.
Unlock Deck
k this deck
25
Which of the following is not necessarily the characteristic of investment casting?

A)No disfiguring parting line as found on castings made by cope and drag methods
B)Extreme dimensional accuracy
C)Excellent surface finish
D)Low cost
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Unlock Deck
k this deck
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