In lapping operation, the amount of metal removed is
0.005 to 0.01 mm
0.01 to 0.1 mm
0.05 to 0.1 mm
0.5 to 1 mm
Correct Answer :
A. 0.005 to 0.01 mm
Related Questions
A diamond locating pin is used in jigs and fixtures because
Diamond is very hard and wear resistant
It occupies very little space
It helps in assembly with tolerance on centre distance
It has a long life
Which among the NC operations given below are continuous path operations? Arc Welding (AW), Drilling (D), Laser Cutting of Sheet Metal (LC), Milling (M), Punching in Sheet Metal (P), Spot Welding (SW)
AW, LC and M
AW, D, LC and M
D, LC, P and SW
D, LC, and SW
When the shear angle is large
Path of shear is short and chip is thin
Path of shear is large and chip is thick
Path of shear is short and chip is thick
Path of shear is large and chip is thin
In the relation VTn = C, the value of n for carbide tools is
0.1 to 0.2
0.20 to 0.25
0.25 to 0.40
0.40 to 0.55
If a particular Fe-C alloy contains less than 0.83% carbon, it is called
High speed steel
Hypo eutectoid steel
Hyper eutectoid steel
Cast iron
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
Carbide tipped tools usually have
Negative rake angle
Positive rake angle
Any rake angle
No rake angle
The operation of making a cone-shaped enlargement of the end of a hole is known as
Counter-sinking
Counter-boring
Trepanning
Spot facing
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 metal machining, the zone where the maximum heat is generated due to the plastic deformation of metal, is called
Friction zone
Work-tool contact zone
Shear zone
None of these
The drill spindles are provided with standard taper known as
Morse taper
Seller's taper
Chapman taper
Brown and Sharpe taper
In _________ operation, the chip thickness is minimum at the beginning of the cut and it reaches to the maximum when the cut terminates.
Conventional milling
Climb milling
Face milling
End milling
Two plates of the same metal having equal thickness are to be butt welded with electric arc. When the plate thickness changes, welding is achieved by
Adjusting the current
Adjusting the duration of current
Changing the electrode size
Changing the electrode coating
The cutting speed for counter-boring should be _________ that of drilling operation.
Equal to
Less than
Greater than
None of these
In metal machining, the zone where the heat is generated due to friction between the moving chip and the tool face, is called
Friction zone
Work-tool contact zone
Shear zone
None of these
The in-feed grinding is used to
Produce tapers
Grind shoulders and formed surfaces
Grind long, slender shafts or bars
All of these
A tool used to withdraw a drill from the sleeve is called
Drill remover
Drill puller
Drift
Drill drawer
When the tool moves parallel to the lathe axis, the movement is termed as
Cross feed
Angular feed
Longitudinal feed
Any one of these
Which of the following statement is correct in regard to centreless grinding?
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
Two streams of liquid metal which are not hot enough to fuse properly result into a casting defect known as
Cold shut
Swell
Sand wash
Scab
Buffing wheels are made of
Softer metals
Cotton fabric
Carbon
Graphite
NC contouring is an example of
Continuous path positioning
Point-to-point positioning
Absolute positioning
Incremental positioning
As the cutting speed increases, the tool cutting forces
Remain constant
Increases
Decreases
First increases and then decreases
For machining a mild steel workpiece by a high speed steel tool, the average cutting speed is
5 m/min
10 m/min
15 m/min
30 m/min
Climb milling is chosen while machining because
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
In order to achieve a specific surface finish in single point turning, the most important factor to be controlled is
Depth of cut
Cutting speed
Feed
Tool rake angle
The height of each tooth of a broach is
Same throughout
In progressively decreasing order
In progressively increasing order
None of these
The cutting angle of a flat drill varies from
3° to 8°
20° to 30°
60° to 90°
90° to 120°
The cutting fluid mostly used for machining alloy steels is
Water
Soluble oil
Dry
Sulphurised mineral oil
In up milling, the thickness of chip is
Minimum at the beginning of the cut and maximum at the end of the cut
Maximum at the beginning of the cut and minimum at the end of the cut
Uniform throughout the cut
None of these