In a centrifugal casting method
Core is made of sand
Core is made of ferrous metal
Core is made of nonferrous metal
No core is used
Correct Answer :
D. No core is used
Related Questions
The sand used for making cores is
Green sand
Dry sand
Loam sand
Oil sand
The directional solidification in casting can be improved by using
Chills and chaplets
Chills and padding
Chaplets and padding
Chills, chaplets and padding
For arc welding
Alternating current with high frequency is used
Alternating current with low frequency is used
Direct current is used
Any one of these
In a simple die
Two or more operations are performed simultaneously at the single stroke of the ram
Two or more cutting operations are performed at one station of the press in every stroke of the ram
Both cutting and non-cutting operations are performed at one station of the press in every stroke of the ram
None of the above
The centrifugal casting method, is used for casting articles of
Symmetrical shape about vertical axis
Symmetrical shape about horizontal axis
Irregular shape
Nonferrous metal only
The dowels are
Wooden nails
Box nails
Wire nails
None of these
In a cold chamber die casting machine, only nonferrous alloys with _________ are casted.
Low melting temperature
High melting temperature
Both (A) and (B)
None of these
The diaphragm moulding machine is used to
Ram the sand harder at the pattern face with decreasing hardness towards the back of the mould
Ram the sand harder at the back of the mould and softer on the pattern face
Produce uniform packing of sand in the mould
Give uniform sand hardness throughout the mould
The operation of bending a sheet of metal along a curved axis, is known as
Plunging
Notching
Slitting
Forming
Thermit, used in Thermit welding, is a mixture of
Charcoal and iron oxide
Charcoal and aluminium
Iron oxide and aluminium
Charcoal, iron oxide and aluminium
Neutral flame is used to weld
Steel
Cast iron
Copper
All of these
In piercing operation, the clearance is provided on
Punch
Die
Half on the punch and half on the die
Either on punch or die depending upon designer's choice
During drawing operation, the states of stress in cup would include
Compressive stress in the flange
Tensile stress in the wall
Both (A) and (B)
None of these
The acetylene cylinder is usually painted with
Black colour
White colour
Maroon colour
Yellow colour
The metal patterns as compared to wooden patterns require less
Shrinkage allowance
Machining allowance
Draft allowance
Distortion allowance
Which of the following material can be used for making patterns?
Aluminium
Wax
Lead
All of these
In submerged arc welding, an arc is produced between a
Carbon electrode and the work
Metal electrode and the work
Bare metal electrode and the work
Two tungsten electrodes and the work
Cold working of metal increases
Tensile strength
Yield strength
Hardness
All of these
The tolerance produced by shell moulding process of casting is
+0.05 mm
±0.2 mm
+0.5 mm
±1 mm
The cold chisels are made from
Cast iron
Mild steel
High speed steel
Cast tool steel
In sheet metal work, he cutting force on the tool can be reduced by
Grinding the cutting edges sharp
Increasing the hardness of tool
Providing shear on tool
Increasing the hardness of die
A two high rolling mill consists of two rolls which rotate
At the same speed and in the same direction
At the same speed but in opposite direction
At different speeds and in the same direction
At different speeds and in the opposite direction
The edge of a steel plate cut by oxygen cutting will get hardened when the carbon content is
Less than 0.1 percent
Less than 0.3 percent
More than 0.3 percent
Anywhere between 0.1 to 1 percent
In a unilateral system of tolerance, the tolerance is allowed on
One side of the actual size
One side of the nominal size
Both sides of the actual size
Both sides of the nominal size
The flux commonly used in brazing is
Zinc chloride
Ammonium chloride
Rosin plus alcohol
Borax
A casting defect which occurs due to improper venting of sand is known as
Cold shuts
Blow holes
Shift
Swell
In die casting, machining allowance is
Small
Large
Very large
Not provided
The operation of cutting a cylindrical hole in a sheet of metal by the punch and die is called
Shearing
Piercing
Punching
Blanking
The temperature of the inner luminous cone of neutral flame is about
1000°C
1250°C
2100°C
3200°C
4.Linde welding uses
Neutral flame and rightward technique
Oxidising flame and leftward technique
Neutral flame and leftward technique
Carburising flame and rightward technique