The surface to be machined is marked on the pattern by
Red colour
Yellow colour
Black colour
Blue colour
Correct Answer :
A. Red colour
Related Questions
An oxidising process used for aluminium and magnesium articles is called
Galvanising
Anodising
Parkerising
Sherardizing
Which of the following welding method uses a pool of molten metal?
Carbon arc welding
Submerged arc welding
TIG arc welding
MIG arc welding
In order to get uniform thickness of the plate by rolling process, one provides
Camber on the rolls
Offset on the rolls
Hardening of the rolls
Antifriction bearings
A mortise gauge is a
Striking tool
Planing tool
Boring tool
Marking tool
Extrusion
Is extensively used for making bolts and nuts
Is used for reducing the diameter of round bars and tubes by rotating dies which open and close rapidly on the work
Is used to improve fatigue resistance of the metal by setting up compressive stresses in its surface
Consists of pressing the metal inside a chamber to force it out by high pressure through an orifice which is shaped to provide the desired form of the finished part
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
The property of sand due to which the sand grains stick together is called
Collapsibility
Permeability
Cohesiveness
Adhesiveness
When more volume of acetylene and less volume of oxygen is supplied, then a ________ flame is obtained.
Neutral
Oxidising
Carburising
None of these
A casting defect which results in general enlargement of a casting is known as
Shift
Sand wash
Swell
Scab
In electric resistance welding, voltage required for heating is
1 to 5 volts
6 to 10 volts
11 to 20 volts
50 to 100 volts
A rip saw
Is a two man saw
Is used for cutting along the grains of wood
Has a narrow blade with two wooden handles
All of the above
Carburising flame is used to weld
Steel, cast iron, copper, aluminium etc
Brass and bronze
Hard surfacing materials such as stellite
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
The property of sand due to which it evolves a great amount of steam and other gases is called
Collapsibility
Permeability
Cohesiveness
Adhesiveness
In electric resistance welding, pressure applied varies from
1 to 5 MPa
5 to 10 MPa
10 to 25 MPa
25 to 55 MPa
The mode of deformation of the metal during spinning is
Bending
Stretching
Rolling and stretching
Bending and stretching
Blanking and piercing operations can be performed simultaneously in a
Simple die
Progressive die
Compound die
Combination die
According to Indian standard specifications, 100 H6/g 5 means that.
Basic size is 100 mm
Actual size is 100 mm
Difference between the actual size and basic size is 100 mm
None of the above
In forehand welding, the angle between the welding torch and the work is ________ as compared to backhand welding.
Same
Less
More
None of these
The sand used for making cores is
Green sand
Dry sand
Loam sand
Oil sand
In average work, the tolerance produced by investment casting method is
±0.05 mm
+0.2 mm
+05 mm
+1 mm
Piercing is an operation of cutting
A cylindrical hole in a sheet of metal by the punch and the die
A hole (other than cylindrical) in a sheet of metal by the punch and the die
A flat sheet to the desired shape
A number of holes evenly spaced in a regular pattern on a sheet of metal
In sheet metal blanking, shear is provided on punches and dies so that
Press load is reduced
Good cut edge is obtained
Warping of sheet is minimised
Cut blanks is straight
Lap joints are employed on plates having thickness
Less than 3 mm
5 to 10 mm
12.5 mm
Above 25 mm
The oxygen cylinder is usually painted with
Black colour
White colour
Maroon colour
Yellow colour
The operation of cutting of a flat sheet to the desired shape is called
Shearing
Piercing
Punching
Blanking
Metal patterns are used for
Small castings
Large castings
Complicated castings
Large scale production of castings
A file removes the metal during
Forward stroke
Return stroke
Both forward and return strokes
None of these
Scribing block is used to
Hold the round bars during marking
Check the trueness of flat surfaces
Locate the centres of round bars
Check the surface roughness
The chisel used for cutting key ways is
Flat chisel
Cape chisel
Round nose chisel
Diamond pointed chisel