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Worksheetscasting process
Total questions: 25
Worksheet time: 28mins
The low permeability in sand can cause which of the following defects in casting
Rough surface
Blow holes
Hot Tears
Drop
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
Which of the following is true about riser?
It permits the molten metal to rise above the highest point in the casting.
Filling up of mould cavity can be visually checked from it.
The casting solidifies directionally towards the riser
Which of the following is not a casting defect?
Swell
Hot Tears
Shrinkage
Hot Cracks
Which of the following is true for sand castings?
They cannot be used for pressure tight vessels
They are stronger than wrought products
They have lower density and poor strength
They have poor ductility
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
Petrol engine cylinder are made by
Shell moulding
Plaster mould casting
Investment casting
Centrifugal casting
What kind of manufacturing system you will use if you have to manufacture a Ferrari?
Custom
Continuous
Intermittent
Mechanical working processes are performed on metals
to achieve optimum mechanical properties in the metal
to improve the mechanical strength of the metal
to make metal dense
All of the above
Castings are usually
costlier than forgings
cheaper than forgings
at the same rate as forging for similar metal
None of the above
Which of the following statement is true?
Casting is the replica of the object to be cast
Pattern is the replica of the casting object
Casting and the pattern are same things
Molten material is casted into the casting cavity
Pattern cannot be constructed out of which of the following materials?
Wood
Wax
Oil
Metal
Which of the following factor is not to be considered while selecting a refractory?
Conductivity
Expansion
Size of the particle
Permeability
Brazing is a type of metal joining process.
a) true
b) false
Casting includes grinding process.
a) true
b) false
Which of the following is not the type of joining process?
a) adhesive bonding
b) brazing
c) soldering
d) none of the mentioned
Which of the following is the type of permanent joining process?
a) welding
b) soldering
c) both welding and soldering
d) none of the mentioned
Which of the following is not a component of the gating system?
a) Pouring cups
b) Sprue
c) Pattern
d) Runners
1.Which of the following is not used in the green sand?
a) Clay
b) Water
c) Oil
d) Chemicals
2. Green sand molding cannot be used for _________ moulds.
a) Simple
b) Small
c) Medium
d) Complex
4._____________ is used as a pattern material for the easy handling of the equipment.
a) Wood
b) Charcoal
c) Steel
d) Lead
