In backhand welding, the angle between the welding torch and the work is kept as
30°-40°
40°-50°
50°-60°
60°-70°
Correct Answer :
B. 40°-50°
Related Questions
The algebraic difference between the maximum limit and the basic size is called
Actual deviation
Upper deviation
Lower deviation
Fundamental deviation
In a four high rolling mill, the diameter of backing up rolls is ________ the diameter of working rolls.
Equal to
Smaller than
Larger than
None of these
When a pattern is made in three parts, the top part, is known as a
Drag
Cheek
Cope
None of these
The minimum size of a bloom is
5 cm × 5 cm
10 cm × 10 cm
15 cm × 15 cm
20 cm × 20 cm
An oxidising process used for aluminium and magnesium articles is called
Galvanising
Anodising
Parkerising
Sherardizing
A file removes the metal during
Forward stroke
Return stroke
Both forward and return strokes
None of these
The increase in hardness due to cold working, is called
Age hardening
Work hardening
Induction hardening
Flame hardening
In a gas welding of mild steel using an oxyacetylene flame, the total amount of acetylene consumed is 10 litres. The oxygen consumption from the cylinder is
5 litres
10 litres
15 litres
20 litres
When filing soft metals, the file teeth are clogged with minute particles of metal. The file should be cleaned by
Washing it with water
Rubbing on wood
Washing it with dilute acid
Using file card
A casting defect which occurs near the ingates as rough lumps on the surface of a casting is known as
Shift
Sand wash
Swell
Scab
Lancing is the operation of
Cutting a sheet of metal in a straight line along the length
Removal of metal to the desired shape from the edge of a plate
Cutting a sheet of metal through part of its length and then bending the cut portion
Bending a sheet of metal along a curved axis
When the file is moved to and fro over the work, it is known as
Cross filing
Draw filing
Pull and push filing
None of these
For welding plates of thickness more than 12.5 mm, its edges
Do not require bevelling
Should be bevelled to a single-V or U-groove
Should have a double-V or U-groove on one side
Should have a double-V or U-groove on both sides
Swab is used for
Smoothing and cleaning out depressions in the mould
Cleaning the moulding sand
Moistening the sand around the edge before removing pattern
Reinforcement of sand in the top part of the moulding box
The flux commonly used in brazing is
Zinc chloride
Ammonium chloride
Rosin plus alcohol
Borax
In order to cut mild steel, the cutting angle of chisel should be
30°
45°
50°
60°
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
In order to ram the sand harder at the back of the mould and softer on the pattern face, a ________ is used.
Sand slinger
Squeezing machine
Jolt machine
Stripper plate machine
Blanking and piercing operations can be performed simultaneously in a
Simple die
Progressive die
Compound die
Combination die
Acetylene gas is stored in cylinders in
Solid form
Gaseous form
Liquid form
Any one of these
Neutral flame is used to weld
Steel
Cast iron
Copper
All of these
The property of sand due to which the sand grains stick together is called
Collapsibility
Permeability
Cohesiveness
Adhesiveness
The algebraic difference between the minimum limit and the basic size is called
Actual deviation
Upper deviation
Lower deviation
Fundamental deviation
The casting method adopted for ornaments and toys of nonferrous alloys, is
Permanent mould casting
Slush casting
Die casting
Centrifugal casting
The maximum flame temperature occurs
At the outer cone
At the inner cone
Between the outer and inner cone
At the torch tip
Lap joints are employed on plates having thickness
Less than 3 mm
5 to 10 mm
12.5 mm
Above 25 mm
Most of the oxyacetylene welding is done with
Neutral flame
Oxidising flame
Carburising flame
All of these
A sand employed on the faces of the pattern before moulding, is called
Green sand
Dry sand
Loam sand
Parting sand
Which of the following material can be used for making patterns?
Aluminium
Wax
Lead
All of these
4.Linde welding uses
Neutral flame and rightward technique
Oxidising flame and leftward technique
Neutral flame and leftward technique
Carburising flame and rightward technique