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WorksheetsIET_Civil_Workshop_Practice_Casting
Total questions: 20
Worksheet time: 7mins
Which of the following pattern is used to produce a multiple simple castings component?
match plate pattern
loose piece pattern
gated pattern
split pattern
Grinding machines are used to _________________
Remove excess metal
Smooth and clean
Sharpen cutting tools
All of them
The bottom part of the casting mold is called:
Cope
Drag
Flask
Riser
Expendable mold processes involve destroying the mold after casting process.
True
False
For mass production, the best process to be used is :
Expendable mold processes
Permanent mold processes
Sand casting mold processes
Clay casting mold processes
The distortion in casting cannot be prevented by
modification of casting design
modification of casting design
providing sufficient machining allowance to cover the distortion effect
providing proper shrinkage allowance
The low permeability (Porosity) in sand can cause which of the following defects in casting
Rough surface
Blow holes
Hot Tears
Drop
Which of the following is not a casting defect?
Swell
Hot Tears
Shrinkage
Hot Cracks
According to their use, which of the following is not a type of moulding sand?
Green Sand
Dry Sand
Loam Sand
Wet Sand
The function of cores in casting is to
form extended parts
form internal cavities
used for directional solidification
none of the above
In permanent mould casting, the molten metal is poured
under external pressure
under gravity
partially under gravity and partially under external
pressure
none of the above
Which of the following is not true for permanent mould casting?
They are superior in hardness
can be used for pressure tight vessel (upto 15 Kgf/cm2)
can be used for large size castings
not suitable for alloys of high temperature
In hot chamber die casting machine
melting unit is an integral part of machine
It is used for high melting (above 500°C) alloys
No pressure is used for forcing the metal inside the
die
None of the above
In cold chamber die casting machine
melting unit is an integral part of machine
melting chamber is an external part of machine
melting chamber can be placed anywhere
low pressure is required to force the molten metal into
the die casting
Use of runner, risers and cores are eliminated in
Centrifuged casting
Die casting
Permanent mould casting
Semi permanent mould casting
Cast iron pipes and cylindrical barrels are produced in
true centrifugal casting
semi centrifugal casting
centrifuged casting
die casting
Which of the following is true for die used in die casting machine?
One part of die is stationery and other is moveable
Both part of die are stationery
Both part of die are moveable
None of the above
Alloys of which of the following metal is not used for hot chamber die casting?
Tin
Lead
Zinc
Iron
A tool used for lifting the pattern from the mould is called:
Lifter
Slick
Spike
Trowel
Misruns and cold shuts in sandcasting are caused by:
lower pouring temperature
faulty moulding flask
lower strength of the solidified metal
higher pouring temperature
