In a four high rolling mill, the diameter of backing up rolls is __________ the diameter of working rolls.
Fin is a casting defect which is due to thin projections of metal not intended as a part of casting.
In a gas welding of mild steel using an oxy-acetylene flame, the total amount of acetylene consumed islitre. The oxygen consumption from the cylinder is
The property of sand due to which the sand grains stick together, is called
If an aluminium pattern made from a wooden master pattern is to be used for grey iron castings, then the shrinkage allowance allowed on the wooden pattern should be
Swab is used for
The two rolls in a two high rolling mills are of __________ size.
According to Indian standard specifications,H6/g 5 means that.
In tungsten-inert gas arc welding, a __________ electrode is used.
The binder commonly used in making oil sand, is
The diaphragm moulding machine is used to
The welding process used to join the ends of two pipes of uniform cross-section, is
The process of increasing the cross-section of a bar at the expense of its length, is called
The sand used for making cores is
The temperature produced by oxy-hydrogen flame is about
For arc welding
The temperature of the inner luminous cone of neutral flame is about
The welding process used in joining mild steel shanks to high speed drills, is
Which of the following statement is wrong?
When the dimension is expressed as , then the tolerance is
When the molten metal is fed in the cavity of a metallic mould by gravity, the method of casting is known as
In TIG arc welding, the welding zone is shielded by an atmosphere of
Sand wash is a casting defect which
When the file is moved to and fro over the work, it is known as
The metal patterns as compared to wooden patterns require less
The mode of deformation of the metal during spinning is
The edge of a steel plate cut by oxygen cutting will get hardened when the carbon content is
Hot piercing is extensively used for making bolts and nuts.
The metal extrusion process is generally used for producing
Cold working distorts grain structure and does not provide an appreciable reduction in size.
Loam sand is a mixture of
The upsetting is a process of
The operation of cutting a cylindrical hole in a sheet of metal by the punch and die is called
The cold chisels are made from
A three high rolling mill consists of three rolls placed one above the other. Which of the following statement is correct?
If neutral flame is used in oxy-acetylene welding, both oxygen and acetylene cylinders of the same capacity will be emptied at the same time.
Cutting and forming operations can be performed in a single operation in a
The process extensively used for making bolts and nuts is
For welding plates of thickness more than 12.5 mm, its edges
In order to cut mild steel, the cutting angle of chisel should be
In die casting, machining allowance is
In spot welding, the spacing between two spot weld should not be less than
The shrinkage allowance for cast iron pattern is
To prevent the body of the blade from jamming in the saw cut, the teeth of blade are
The oxy-acetylene gas used in gas welding produce a flame temperature of
Metal patterns require __________ draft allowance than wooden patterns.
Which of the following material can be used for making patterns ?
The teeth of hacksaw blade are bent
Spot welding is used for welding
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