Neutral flame is usd to weld
When more volume of acetylene and less volume of oxygen is supplied, then a __________ flame is obtained.
The brass and bronze are welded by __________ flame.
The instrument used to measure external and internal diameter of shafts, thickness of parts and depth of holes, is
Projection welding is a
For gas welding, the pressure desired at the welding torch for oxygen is
The material which can be best cut with oxygen cutting process is
The punch and die set up is __________ for punching and piercing operation.
The operation of cutting a number of holes evenly spaced in a regular pattern on a sheet of metal is. called perforating.
Which of the following statement is wrong?
The adhesiveness is the property of a sand due to which
Seam weiding is a
In fore-hand welding, the weld is made
For smoothing and cleaning out depressions in the mould, a __________ is used.
Cast iron and steel pipes are produced by
The metal is subjected to mechanical working for
When two metal pieces of different thicknesses are to be welded by projection welding, then the projections should be made on __________ metal piece.
A stripper-plate machine is used to draw the pattern from the mould.
In a simple die
In spot welding, the distance between the nearest edge of the plate and centre of weld should be equal to
In order to produce uniform packing of sand in the moulds, a __________ is used.
The acetylene cylinder is usually painted with
In blanking operation, the clearance is provided on
The process of decreasing the cross-section of a bar and increasing its length, is called
A pattern is used to make the mould cavity for pouring the molten metal for casting.
The oxidising flame is similar to neutral flame but the inner cone is less luminous and shorter.
During hot working of metals
In fore-hand welding, the angle between the welding rod and the work is kept as
The algebraic difference between the maximum limit and the basic size is called
The operation of producing cup shaped parts from flat sheet metal blanks by bending and plastic flow of metal, is known as
Thermit, used in thermit welding, is a mixture of
The difference between the upper limit and lower limt of a dimension is called
The hot working of metals is carried out
The process used to improve fatigue resistance of the metal by setting up compressive stresses in its surface, is known as
The operation of giving impressions of figures, letters or designs on sheet metal parts, is known as embossing.
In order to ram the sand harder at the back of the mould and softer on the pattern face, a __________ is used.
In piercing operation, the clearance is provided on
A casting defect which occurs due to improper venting of sand is known as
The surface to be left unmachined is marked on the pattern by
A hacksaw blade is specified by its
The electron beam welding can be carried out in
The minimum size of a bloom is
The width of slot cut by a hacksaw blade is __________ the width of the blade.
Green sand is a mixture of