The capacity of a material to be welded under the imposed fabrication conditions into a specific, suitably designed structure and to perform satisfactorily in the intended service is known as?
Weldment
Weld tab
Weldability
Tack weld
Correct Answer :
C. Weldability
Related Questions
A single point thread cutting tool should ideally hav
Zero rake angle
Positive rake angle
Negative rake angle
Point angle
If the cutting speed is increased, then the built-up-edge
Becomes longer
May or may not form
Becomes smaller and finally does not form at all
Has nothing to do with speed
The carbide tools operating at very low cutting speeds (below 30 m/min)
Reduces tool life
Increases tool life
Have no effect on tool life
Spoils the work piece
The maximum production of small and slender parts is done by
Watch maker's lathe
Sliding head stock automatic lathe
Multi-spindle automatic lathe
Capstan lathe
Dielectric is used in
Electrochemical machining
Ultrasonic machining
Electro discharge machining
Laser machining
The cutting speed for drilling __________ with high speed steel drills is 24 to 45 m/min.
Mild steel
Copper
Aluminium
Brass
High speed steel drills can be operated at about _________ the speed of high carbon steel drills.
One-half
One-fourth
Double
Four times
Which of the following statement is correct for orthogonal cutting system?
The cutting edge of the tool is perpendicular to the direction of tool travel.
The cutting edge clears the width of the workpiece on either ends.
The chip flows over the tool face and the direction of the chip flow velocity is normal to the cutting edge.
All of the above
In centreless grinding, work place centre will be
Above the line joining the two wheel centres
Below the line joining the two wheel centres
On the line joining the two wheel centres
At the intersection of the line joining the wheel centres with the work place plane
In which of the following machine, the work rotates and the tool is stationary?
Vertical boring machine
Horizontal boring machine
Precision boring machine
Jig boring machine
Carbide tipped tools usually have
Negative rake angle
Positive rake angle
Any rake angle
No rake angle
In a planer
Tool is stationary and work reciprocates
Work is stationary and tool reciprocates
Tool moves over stationary work
Tool moves over reciprocating work
Relief angles on high speed steel tools usually vary from
0° to 3°
3° to 10°
10° to 20°
20° to 30°
The machining of titanium is difficult due to
High thermal conductivity of titanium
Chemical reaction between tool and work
Low tool-chip contact area
None of these
The cutting force in punching and blanking operations mainly depends on
The modulus of elasticity of metal
The shear strength of metal
The bulk modulus of metal
The yield strength of metal
In drilling brass, a drill with
Zero helix angle is used
Low helix angle is used
High helix angle is used
Any helix angle can be used
For machining a cast iron workpiece by a high speed steel tool, the average cutting speed is
10 m/min
15 m/min
22 m/min
30 m/min
In oblique cutting system, the maximum chip thickness
Occurs at the middle
May not occur at the middle
Depends upon the material of the tool
Depends upon the geometry of the tool
A mandrel is used to hold
An eccentric work
A heavy work
A thin work
None of these
In a plain milling cutter, the chip space between the back of one tooth and the face of the next tooth is called
Face
Fillet
Gash
Land
As tool and work are not in contact in EDM process
No relative motion occurs between them
No wear of tool occurs
No power is consumed during metal cutting
No force between tool and work occurs
The lip angle of a single point tool is usually
20° to 40°
40° to 60°
60° to 80°
None of these
The tap used to cut threads in a blind hole is
Taper tap
Second tap
Bottoming tap
Any one of these
Tool life is measured by the
Number of pieces machined between tool sharpenings
Time the tool is in contact with the job
Volume of material removed between tool sharpenings
All of the above
Tumbler gears in lathe are used to
Reduce the spindle speed
Cut gears
Give desired direction of movement to the lathe carriage
Drill a workpiece
In ultrasonic machining, the metal is removed by
Using abrasive slurry between the tool and work
Direct contact of tool with the work
Maintaining an electrolyte between the work and tool in a very small gap between the two
Erosion caused by rapidly recurring spark discharges between the tool and work
Misrun is a casting defect which occurs due to
Very high pouring temperature of the metal
Insufficient fluidity of the molten metal
Absorption of gases by the liquid metal
Improper alignment of the mould flasks
An important geometrical quantity in the cutting of metals which can be used as a criterion for machinability of metals is
Cutting speed
Feed rate
Shear angle
Tool geometry
The tool may fail due to
Cracking at the cutting edge due to thermal stresses
Chipping of the cutting edge
Plastic deformation of the cutting edge
All of these
An expendable pattern is used in
Slush casting
Squeeze casting
Centrifugal casting
Investment casting