Counter-sinking
Counter-boring
Trepanning
Spot facing
D. Spot facing
15 to 19 m/min
25 to 31 m/min
60 to 90 m/min
90 to 120 m/min
For holding and guiding the tool in drilling, reaming or tapping operations
For holding the work in milling, grinding, planing or turning operations
To check the accuracy of workpiece
None of the above
Has no effect on
Increase
Decrease
None of these
Reduce built up edge
Break up chips
Improve machinability
All of these
Mild steel
Cast iron
High speed steel
High carbon steel
Negative rake angle
Positive rake angle
Any rake angle
No rake angle
Zero helix angle is used
Low helix angle is used
High helix angle is used
Any helix angle can be used
Porosity
Undercut
Under fill
Crack
Cast iron
Mild steel
Brass
Aluminium
Shear velocity
Chip velocity
Cutting velocity
Mean velocity
It is best suited for machining hard and brittle materials
It cuts materials at very slow speeds
It removes large amount of material
It produces good surface finish
0.20
0.30
0.50
0.60
Taper tap
Second tap
Bottoming tap
Any one of these
Hardenability of low carbon steels
Machinability of low carbon steels
Hardenability of high carbon steels
Machinability of high carbon steels
Spot facing
Boring
Tapping
Drilling
In-feed grinding
Through feed grinding
End-feed grinding
Any one of these
Nose part, front relief face and side relief face of the cutting tool
Face of the cutting tool at a short distance from the cutting edge
Cutting edge only
Front face only
Zero helix angle is used
Low helix angle is used
High helix angle is used
Any helix angle can be used
Electrochemical machining
Electro-discharge machining
Ultrasonic machining
None of these
Cracking at the cutting edge due to thermal stresses
Chipping of the cutting edge
Plastic deformation of the cutting edge
All of these
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
Low cutting speed and large rake angle
Low cutting speed and small rake angle
High cutting speed and large rake angle
High cutting speed and small rake angle
120
170
180
240
Hard and brittle materials
Soft and ductile materials
Hard and ductile materials
Soft and brittle materials
One-half
One-fourth
Double
Four times
The workpiece is supported throughout its entire length as grinding takes place.
It is a continuous process and adopted for production work.
It requires no holding device for the work.
All of the above
Machining horizontal surface
Machining vertical surface
Machining angular surface
All of these
Feed the casting at a rate consistent with the rate of solidification.
Act as a reservoir for molten metal
Feed molten metal from the pouring basin to the gate
Help feed the casting until all solidification takes place
Doubled
Halved
Quadrupled
Unchanged
Vertical boring machine
Horizontal boring machine
Precision boring machine
Jig boring machine