The snag grinding is done
To produce good surface finish and high degree of accuracy
To remove considerable amount of metal without regard to accuracy of the finished surface
To grind exterior cylindrical surfaces
Any one of the above
Correct Answer :
B. To remove considerable amount of metal without regard to accuracy of the finished surface
Related Questions
The lip clearance angle is the angle formed by the
Leading edge of the land with a plane having the axis of the drill
Flank and a plane at right angles to the drill axis
Chisel edge and the lip as viewed from the end of a drill
None of the above
The lathe spindles at the nose end have
Internal screw threads
External screw threads
No threads
Tapered threads
Trepanning is an operation of
Making a cone-shaped enlargement of the end of a hole
Smoothing and squaring the surface around a hole
Sizing and finishing a small diameter hole
Producing a hole by removing metal along the circumference of a hollow cutting tool
The tool life is said to be over if
Poor surface finish is obtained
There is sudden increase in cutting forces and power consumption
Overheating and fuming due to heat of friction starts
All of the above
The specific cutting energy used for establishing the machinability of the metal depends upon its
Coefficient of friction
Microstructure
Work hardening characteristics
All of these
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
The rake angle of a single point cutting tool corresponds to _________ of a twist drill.
Lip clearance angle
Helix angle
Point angle
Chisel edge angle
Which of the following statement is correct about EDM machining?
It can machine hardest materials.
It produces high degree of surface finish.
The tool and work are never in contact with each other.
All of these
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
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
The hard grade grinding wheels are denoted by the letters
A to H
I to P
Q to Z
A to P
The operation of producing grooves around the periphery of a cylindrical or conical workpiece is called
Profile milling
Gang milling
Saw milling
Helical milling
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
It is required to cut screw threads of 2 mm pitch on a lathe. The lead screw has a pitch of 6 mm. If the spindle speed is 60 r.p.m., then the speed of lead screw will be
10 r.p.m.
20 r.p.m.
120 r.p.m.
180 r.p.m.
Which of the following statement is wrong?
The diamond is the hardest tool material and can run at cutting speeds about 50 times that of high speed steel tool.
The ceramic tools can be used at cutting speeds 40 times that of high speed steel tools.
The cemented carbide tools can be used at cutting speeds 10 times that of high speed steel tools.
The ceramic tools can withstand temperature upto 600°C only.
The angle between the shear plane and __________ is called shear angle.
Work surface
Tool face
Machine surface
None of these
The method of grinding used to produce a straight or tapered surface on a workpiece, is
Internal cylindrical grinding
Form grinding
External cylindrical grinding
Surface grinding
The saw milling is an operation of
Producing grooves around the periphery of a cylindrical or conical workpiece
Producing narrow slots or grooves on a workpiece
Reproduction of an outline of a template on a workpiece
Machining several surfaces of a workpiece simultaneously
Lathe bed is made of
Mild steel
Alloy steel
Pig iron
Chilled cast iron
The cutting speed for drilling aluminium, brass and bronze with high speed steel drills varies from
10 to 20 m/min
18 to 30 m/min
24 to 45 m/min
60 to 90 m/min
The cutting tool in a milling machine is mounted on
Spindle
Arbor
Column
Knee
The angle made by the face of the tool and the plane parallel to the base of cutting tool is called
Rake angle
Cutting angle
Clearance angle
Lip angle
Discontinuous chips are formed during machining of
Brittle metals
Ductile metals
Hard metals
Soft metals
A lead-screw with half nuts in a lathe, free to rotate in both directions has
V-threads
Whitworth threads
Buttress threads
Acme threads
A set of eight form relieved milling cutters for each module is provided to enable cutting of gears of different
Materials
Types of gears
Number of teeth
Width of gears
Negative rakes are used for
Carbide tools
Heavy loads
Harder materials
All of these
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
An important geometrical quantity in the cutting of metals which can be used as a criterion for machinability of metals is
Cutting speed
Feed rate
Shear angle
Tool geometry
The soft grade grinding wheels are denoted by the letters
A to H
I to P
Q to Z
A to P
The abrasive slurry used in ultrasonic machining contains fine particles of
Aluminium oxide
Boron carbide
Silicon carbide
Any one of these