The material which on machining produces chips with built up edge is
Brittle material
Tough material
Hard material
Ductile material
Correct Answer :
D. Ductile material
Related Questions
The common welding error that occurs due to shrinkage of weld metal, faulty clamping of parts, faulty penetration or overheating at joints is called?
Distortion
Warping
Porous weld
Poor fusion
The cutting fluid mostly used for machining alloy steels is
Water
Soluble oil
Dry
Sulphurised mineral oil
The chuck preferred for quick setting and accurate centering of a job is
Four jaw independent chuck
Collect chuck
Three jaw universal chuck
Magnetic chuck
Small nose radius
Increases tool life
Decreases tool life
Produces chipping and decreases tool life
Results in excessive stress concentration and greater heat generation
In machining metals, chips break due to __________ of work material.
Toughness
Ductility
Elasticity
Work hardening
In electro-discharge machining, dielectric is used to
Help in the movement of the sparks
Control the spark discharges
Act as coolant
All of these
In the relation VTn = C, the value of n for ceramic tools is
0.1 to 0.2
0.20 to 0.25
0.25 to 0.40
0.40 to 0.55
The thrust force will increase with the increase in
Side cutting edge angle
Tool nose radius
Rake angle
End cutting edge angle
The tool life in case of a grinding wheel is the time
Between two successive regrinds of the wheel
Taken for the wheel to be balanced
Taken between two successive wheel dressings
Taken for a wear of 1 mm on its diameter
The chamfering is an operation of
Bevelling the extreme end of a workpiece
Embossing a diamond shaped pattern on the surface of a workpiece
Reducing the diameter of a workpiece over a very narrow surface
Enlarging the end of a hole cylindrically
The depth of cut in drilling is __________ the drill diameter.
Equal to
One-fourth
One-half
Double
In hot machining, tool is made of
Tungsten carbide
Brass or copper
Diamond
Stainless steel
Which of the following operations can be performed with milling cutters?
Cutting key ways on shafts
Cutting external screw threads
Cutting teeth of spur gears
All of these
In up-cut milling the work piece is fed
Against the rotating cutter
At angle of 60° to the cutter
In the direction of the cutter
At the right angle to the cutter
In drilling softer materials, the cutting speed is _________ as compared to harder materials.
Same
Low
High
None of these
The material which on machining produces chips with built up edge is
Brittle material
Tough material
Hard material
Ductile material
The average cutting speed for turning brass with a high speed steel tool is
15 to 19 m/min
25 to 31 m/min
60 to 90 m/min
90 to 120 m/min
Green sand mould indicates that
Polymeric mould has been cured
Mould has been totally dried
Mould is green in colour
Mould contains moisture
For turning small taper on long workpiece, the suitable method is
By a form tool
By setting over the tail stock
By a taper turning attachment
By swivelling the compound rest
The grinding of long, slender shafts or bars is usually done by
In-feed grinding
Through feed grinding
End-feed grinding
Any one of these
What is the type of joining process called, where the parts to be welded are kept in contact and rotated relative to each other and axial pressure is applied when the desired temperature is obtained?
Ultrasonic welding
Forge welding
Electron beam welding
Friction welding
A fine grained grinding wheel is used to grind
Hard and brittle materials
Soft and ductile materials
Hard and ductile materials
Soft and brittle materials
In ECM, the material removal is due to
Corrosion
Erosion
Fusion
Ion displacement
A process of removing metal by pushing or pulling a cutting tool is called
Up milling
Down milling
Forming
Broaching
The negative rake is usually provided on
High carbon steel tools
High speed steel tools
Cemented carbide tools
All of these
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
For turning internal tapers, the suitable method is
By a form tool
By setting over the tail stock
By a taper turning attachment
By swivelling the compound rest
The tail stock set over method of taper turning is preferred for
Internal tapers
Small tapers
Long slender tapers
Steep tapers
Which of the following parameters govern the value of shear angle in continuous chip formation?
True feed
Chip thickness
Rake angle of the cutting tool
All of these
Match the items of List-I (Equipment) with the items of List-II (Process) and select the correct answer using the given codes.
| List-I (Equipment) | List-II (Process) |
|---|---|
| P. Hot Chamber Machine | 1. Cleaning |
| Q. Muller | 2. Core making |
| R. Dielectric Baker | 3. Die casting |
| S. Sand Blaster | 4. Annealing |
| . | 5. Sand mixing |
P-2, Q-1, R-4, S-5
P-4, Q-2, R-3, S-5
P-4, Q-5, R-1, S-2
P-3, Q-5, R-2, S-1