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WorksheetsMP_1_Casting Process
Total questions: 50
Worksheet time: 25mins
In________________ process molten metal is used to produce the products.
Casting
Forming
Machining
Welding
In _________________ process wastage of material is high.
Casting
Forming
Machining
Welding
For mounting several patterns at a time, following type of pattern is used
Combined pattern
Loose piece pattern
Sweep pattern
Match plate pattern
Draft on pattern for casting is
Shrinkage allowance
Identification number marked on it
Taper to facilitate its removal from mould
Increase in size of cavity due shaking of pattern
In order to facilitate with draw of pattern
Pattern is made smooth
Water is applied on pattern surface
Allowance are made on pattern
Draft is provided on pattern
Least shrinkage allowance is provided in the case of following
Brass
Aluminium
Cast iron
Steel
The taper provided on pattern to its easy and clean withdraw from the mould is called
Taper allowance
Distortion allowance
Draft allowance
Pattern allowance
The draft allowance on the patterns is provided in order to
Provide good of air in the sand molding
Provide for distortion that might take place
Remove the pattern easily from the molding
Increase the strength of the molding
The draft allowance on metallic pattern in comparison to wooden ones
Same
More
Less
None of the above
Which of the following materials has more shrinkage allowance
Cast iron
Brass
Lead
Aluminum alloy
Which of the following provides and added projection on a pattern and forms a seat to support and locate the core in the mould
Mould print
Core print
Drag
Cope
Loose piece pattern are
A sort of split pattern
Used when the pattern cannot be drawn from the mould
Similar to core prints
Never used in foundry work
Wood for pattern is considered dry when moisture content is
Zero percent
5%
Less than 15%
Less than 25%
Shrinkage allowance is made by
Adding to external and internal dimensions
Subtracting from external and internal dimensions
Subtracting from external dimensions and adding to internal dimension
Adding to external dimension and subtracting from internal dimensions
The material of pattern in the case of investment casting is
Thermosetting resin
Special plastic
Synthetic sand
Wax
For gray cast iron, the pattern shrinkage allowance is of the order of
2 to 5 mm/m
5 to 7 mm/m
7 to 10.5 mm/m
10.5 to 13.5 mm/m
Color scheme is employed on pattern in order to identify the
Pattern allowance
Cope and drag
Location of core print
None of the above
Blue color on the pattern is marked for
Machined surface
Unfinished surfaces
Loose piece pattern
Never used in pattern making operation
For gray cast iron, the volumetric shrinkage is of the order of
6% - 5%
5% - 3.5%
3.5% - 2.5%
1.9% to negative value
In general, the draft on casting is of the order of
1 – 5 mm/m
5 – 10 mm/m
10 – 15 mm/m
15 – 20 mm/m
The pattern in the cast of machine molding are mounted on
Match plates
Molding boards
Follow boards
Steel table
The allowances to be provided in disposable pattern are
Shrinkage and finish
Distortion
Draft
Shake
Match plate patterns are mostly used in
Green sand molding
Loam molding
Dry sand molding
Machine molding
The following pattern is used for very large castings
Solid pattern
Cope and drag pattern
Skeleton pattern
Split pattern
Surface to be machined are marked on the pattern by the following colour
Red
Yellow
Black
Green
The allowance provided on pattern so that it can be easily withdraw from the mould is
Raping
Shrinking
Draft
Machining
The allowance on pattern in account of shrinkage should be
Negative
Positive
Zero
None of the above
The allowance on pattern in account of rapping should be
Negative
Positive
Zero
None of the above
Metal pattern are used for
Precision castings
Small castings
Large castings
Mass production of castings
One of the important advantages of metal patterns over wooden pattern is that
It is readily available
It is easy to make
Useful in machine molding
Less costly
The most common wood used for pattern is
Devokar
Plywood
Teak
Mahogany
The pattern most suitable for mass production of small castings are
Match plate pattern
Split pattern
Skelton pattern
Single piece
The pattern are made to be larger than the size of the castings required to compensate for the
Shrinkage of casting during cooling
Shrinkage of molding during casting
Porosity of sand
Moisture in sand
All the patterns are subject to wear due to
Ramming and rapping
Shrinkage of metals
Distortion
Heat of molten metal
Match plate patterns are generally used in
Green sand molding
Pit molding
Machine molding
Bench molding
A bell may cast by using the
Split pattern
Segmental pattern
Skelton pattern
Sweep pattern
Sweep patterns are used for
Circular shaped objects
Elliptical shaped objects
Rectangular shaped objects
Large shaped objects
Draft allowance is provided for a pattern to
Avoid injury to edges of the mould
Avoid distortion of mould
Provide enough stock for machining
Provide better finish
The pattern allowance with a slight taper on all vertical surface is known as
Draft
Distortion
Rapping
Mould wall movement
The shrinkage allowance of brass and cast iron per meter are 14 mm and 10 mm respectively. If a cast iron pattern is to be used to produce brass casting then the shrinkage allowance per meter of master pattern is
14 mm
1.4 mm
24 mm
4 mm
The shrinkage allowance for brass per 100 mm is
2.4 mm
5.4 mm
1 mm
1.4 mm
Cam shaft for automotive is manufactured by
Casting
Forging
Extrusion
Rolling
Which of the following is not a casting process_________.
shell process
Extrusion
Semi-centrifuge method
Slush process
The mould is housed in a____.
Flask
Cope
Drag
Cheek
A big advantage of using synthetic sand in foundry shop is that
It is less costly
Its properties can be controlled easily
It possesses high moisture
It possesses high % of clay
Casting process is preferred for parts having________.
A few details
Many details
No details
Non-symmetrical shape
Cope in foundry practice refers to_________________
Bottom half of molding box
Top of molding box
Middle potion of the molding box
Coating on the mould face
In sand molding, the middle part of joining two flask is called_________.
Coupe
Parting line
Drag
Flask-middle
In sand molding the bottom part of the flask is called________.
Cope
Cheek
Drag
Flask bottom
In _________________ process wastage of material is high.
Casting
Forming
Machining
Welding
