In _________ operation, the cutting force is maximum when the tooth begins its cut and reduces it to minimum when the tooth leaves the work.
Up milling
Down milling
Face milling
End milling
Correct Answer :
B. Down milling
Related Questions
The guideways are of
Flat type
V-type
Dovetail type
Any one of these
The factor responsible for the formation of continuous chips with built up edge is
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
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
The tail stock set over method of taper turning is preferred for
Internal tapers
Small tapers
Long slender tapers
Steep tapers
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
Which of the following statement is wrong as regard to down milling?
It can not be used on old machines due to backlash between the feed screw of the table and the nut.
The chips are disposed off easily and do not interfere with the cutting.
The surface milled appears to be slightly wavy.
The coolant can be poured directly at the cutting zone where the cutting force is maximum.
A left hand tool on a lathe cuts most efficiently when it travels
From left to right end of the lathe bed
From right to left end of the lathe bed
With the help of a compound slide
Across the bed
The grinding operation is a
Shaping operation
Forming operation
Surface finishing operation
Dressing operation
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
A push broach as compared to pull broach
Has less number of teeth
Is short and stocky
Removes less material for each pass of the tool
All of the above
A twist drill is a
Side cutting tool
Front cutting tool
End cutting tool
None of these
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
A lathe with four steps on the cone pulley and with back-gears will have
Four direct speeds
Four indirect speeds
Four direct and four indirect speeds
Eight indirect speeds
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
Which of the following statement is incorrect with reference of lathe cutting tools?
The flank of the tool is the surface or surfaces below and adjacent to the cutting edges
The nose is the corner, arc or chamfer joining the side cutting and the end cutting edges
The heel is that part of the tool which is shaped to produce the cutting edges and face
The base is that surface of the shank which bears against the support and takes tangent pressure of the cut
A jig is defined as a device which
Holds and locates a workpiece and guides and controls one or more cutting tools
Holds and locates a workpiece during an inspection or for a manufacturing operation
Is used to check the accuracy of workpiece
All of the above
Which of the following arc welding processes does not use consumable electrodes?
GMAW
GTAW
Submerged Arc Welding
None of these
The size of a shaper is given by
Stroke length
Motor power
Mass of machine
Rate size
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
In ECM, the material removal is due to
Corrosion
Erosion
Fusion
Ion displacement
In an orthogonal cutting, the depth of cut is halved and the feed rate is double. If the chip thickness ratio is unaffected with the changed cutting conditions, the actual chip thickness will be
Doubled
Halved
Quadrupled
Unchanged
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
Friction at the tool-chip interface can be reduced by
Decreasing the rake angle
Increasing the depth of cut
Decreasing the cutting speed
Increasing the cutting speed
When the tool moves parallel to the lathe axis, the movement is termed as
Cross feed
Angular feed
Longitudinal feed
Any one of these
Chemical milling operation is performed
On universal milling machine
On plain milling machine
In a tank containing an etching solution
Any one of these
Which of the following statement is correct about hot machining?
It requires less power than machining metals at room temperature.
The rate of tool wear is lower.
It is used for machining high strength and high temperature resistant materials.
All of the above
The cutting speed of a drill depends upon the
Material of drill
Type of material to be drilled
Quality of surface finish desired
All of these
The rear teeth of a broach
Perform burnishing operation
Remove minimum metal
Remove maximum metal
Remove no metal
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 factor considered for evaluation of machinability is
Cutting forces and power consumption
Tool life
Type of chips and shear angle
All of these