Zero helix angle is used
Low helix angle is used
High helix angle is used
Any helix angle can be used
C. High helix angle is used
Shear velocity
Chip velocity
Cutting velocity
Mean velocity
7
8
9
10
Improves
Deteriorates
Does not effect
None of these
ARC welding
Submerged ARC welding
TIG welding
MIG welding
Increase tool life
Remove chips from bed
Break the chips into short segments
To minimise heat generation
Four jaw independent chuck
Collect chuck
Three jaw universal chuck
Magnetic chuck
Chip thickness ratio
Forces during metal cutting
Wear of the cutting tool
Deflection of the cutting tool
High speed steel
Hypo eutectoid steel
Hyper eutectoid steel
Cast iron
Cracking at the cutting edge due to thermal stresses
Chipping of the cutting edge
Plastic deformation of the cutting edge
All of these
Aluminium oxide
Boron carbide
Silicon carbide
Any one of these
Rate of production is very high
High accuracy and high class of surface finish is possible
Roughing and finishing cuts are completed in one pass of the tool
All of the above
Hot machining
Ultrasonic machining
ECM process
Chemical milling
Independent of index change gear ratio
Dependent on speed change gear ratio
Interrelated to index change gear ratio
Independent of speed and index change gear ratio
5°
10°
15°
20°
Only hob rotates
Only gear blank rotates
Both hob and gear blank rotates
Neither hob nor gear blank rotates
Rake angle
Cutting angle
Clearance angle
Lip angle
In-feed grinding
Through feed grinding
End-feed grinding
Any one of these
Remain constant
Increases
Decreases
First increases and then decreases
Equal to 30°
Less than 30°
More than 30°
None of these
The larger side rake angle produces chipping.
The smaller rake angle produces excessive wear and deformation in tool.
The side cutting edge angle (less than 15°) increases tool life.
The increase in nose radius decreases tool life.
Depth of cut
Cutting speed
Feed
Tool rake angle
Drill a hole
Finish the drilled hole
Correct the hole
Enlarge the existing hole
Vertical boring machine
Horizontal boring machine
Precision boring machine
Jig boring machine
0.1 to 0.2
0.20 to 0.25
0.25 to 0.40
0.40 to 0.55
5 to 10 m/min
10 to 20 m/min
20 to 30 m/min
40 to 60 m/min
1 in 10
1 in 15
1 in 20
1 in 30
Face
Fillet
Gash
Land
Tool steels
Sintered carbides
Glass
All of these
The chip thickness increase gradually
It enables the cutter to dig in and start the cut
The specific power consumption is reduced
Better surface finish can be obtained
Hardness of the material being ground
Nature of the grinding operation
Finish required
All of these