In electric resistance welding, voltage required for heating is
The operation of straightening a curved sheet metal, is known as
The welding set up is said to have straight polarity, when
Aluminium is the best material for making patterns because it is
The vertical welding do not require plate edge preparation uptomm thickness.
An oxidising flame is obtained when equal volumes of oxygen and acetylene are supplied.
A ring gauge is used to
For gas welding, the presure desired at the welding torch for acetylene is
The torch used for oxygen cutting is same as for oxy-acetylene welding.
In a cold chamber die casting machine, a measured quantity of molten metal is brought in a ladle from the melting pot to a chamber and forced into the closed die-section by applying hydraulic pressure upon the plunger.
Thermit welding is often used in
Most of the oxy-acetylene welding is done with
The correct sequence for preparing a billet for extrusion process is pickling, alkaline cleaning, phosphate coating and lubricating with reactive soap.
A moving mandrel is used in
Gagger is used for cleaning the moulding sand.
The dowels are
A neutral flame is obtained by supplying
A casting defect which results in general enlargement of a casting is known as
According to Indian standards, the total number of tolerance grades are
For cutting brass, the hacksaw blade should have __________ teeth permm.
The directional solidification in casting can be improved by using
The cutting edge of a chisel should be
Tandem drawing of wires and tubes is necessary because
The most preferred process for casting gas turbine blades is
In sheet metal work, the cutting force on the tool can be reduced by
In arc welding, the temperature of heat produced by the electric arc is of the order of
An oxidising process used for aluminium and magnesium articles is called
Rotary swaging
A casting defect which occurs near the ingates as rough lumps on the surface of a casting is known as
A sand employed on the faces of the pattern before moulding, is called
Scab is a casting defect which occurs as sand patches on the upper surface of a casting.
In a __________ , both cutting and non-cutting operations are performed at one station of the press in every stroke of the ram.
In order to get uniform thickness of the plate by rolling process, one provides
Extrusion
For welding plates of thickness less than 5 mm, its edges
The operation of cutting of a flat sheet to the desired shape is called
The casting method adopted for ornaments and toys of non-ferrous alloys, is
Cold working requires much higher pressure that hot working.
In order to check the clearance between two mating surfaces, a __________ gauge should be used.
Cores are used to
A jolt machine is used to
A pouring basin acts as a reservoir for the molten metal.
Cold working of metal increases
In a cold chamber die casting machine
The operation of bending a sheet of metal along a curved axis, is known as
When the weld is made from left to right, it is known as back-hand welding.
The drawing down is a process of __________ the cross-section of a bar.
The parts of circular cross-section which are symmetrical about the axis of rotation are made by
Acetylene gas is stored in cylinders in
If the sand is too fine, its permeability will be high.