In machining metal, cutting force at the cutting edge is measured by a
Wattmeter
Dynamometer
Hydrometer
Pyrometer
Correct Answer :
B. Dynamometer
Related Questions
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 ratio between two consecutive spindle speeds for a six-speed drilling machine using drills of diameter 6.25 to 25 mm size and at a cutting velocity of 18 m/min is
1.02
1.32
1.66
1.82
The cutting tool in a milling machine is mounted on
Spindle
Arbor
Column
Knee
When the metal is removed by erosion caused by rapidly recurring spark discharges between the tool and work, the process is known as
Electrochemical machining
Electro-discharge machining
Ultrasonic machining
None of these
The tool material, for faster machining, should have
Wear resistance
Red hardness
Toughness
All of these
The operation of smoothing and squaring the surface around a hole is known as
Counter-sinking
Counter-boring
Trepanning
Spot facing
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
A single point thread cutting tool should ideally hav
Zero rake angle
Positive rake angle
Negative rake angle
Point angle
The height of each tooth of a broach is
Same throughout
In progressively decreasing order
In progressively increasing order
None of these
Side relief angle of a single point tool is the angle
By which the face of the tool is inclined towards back
By which the face of the tool is inclined sideways
Between the surface of the flank immediately below the point and a plane at right angles to the centre line of the point of tool
Between the surface of the flank immediately below the point and a line drawn from the point perpendicular to the base
Fixtures are used
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
Segmental chips are formed during machining
Mild steel
Cast iron
High speed steel
High carbon steel
Hot rolling of mild steel is carried out
At recrystallization temperature
Between 100⁰C to 150⁰C
Between recrystallization temperature
Above recrystallization temperature
The soft grade grinding wheels are denoted by the letters
A to H
I to P
Q to Z
A to P
In ECM, the material removal is due to
Corrosion
Erosion
Fusion
Ion displacement
Carbide tipped tools usually have
Negative rake angle
Positive rake angle
Any rake angle
No rake angle
The broaching operation in which the work moves past the stationary tool is called
Pull broaching
Push broaching
Surface broaching
Continuous broaching
The helix angle of a drill is __________ for drilling brass.
Equal to 30°
Less than 30°
More than 30°
None of these
The negative rake is usually provided on
High carbon steel tools
High speed steel tools
Cemented carbide tools
All 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.
The trade name of a nonferrous cast alloy composed of cobalt, chromium and tungsten is called
Ceramic
Stellite
Diamond
Cemented carbide
Discontinuous chips are formed during machining of
Brittle metals
Ductile metals
Hard metals
Soft metals
When 3-2-1 principle is used to support and locate a three dimensional work-piece during machining, the number of degrees of freedom that are restricted is
7
8
9
10
In a CNC program block, N002 GO2 G91 X40 Z40......, GO2 and G91 refer to
Circular interpolation in counter clockwise direction and incremental dimension
Circular interpolation in counter clockwise direction and absolute dimension
Circular interpolation in clockwise direction and incremental dimension
Circular interpolation in clockwise direction and absolute dimension
The cutting speed for drilling __________ with high speed steel drills is 24 to 45 m/min.
Mild steel
Copper
Aluminium
Brass
Grinding wheels should be tested for balance
Only at the time of manufacture
Before starting the grinding operation
At the end of grinding operation
Occasionally
The angle between the shear plane and __________ is called shear angle.
Work surface
Tool face
Machine surface
None of these
The tailstock set over required to turn a taper on the entire length of a workpiece having diameters D and d is
(D - d)/2L
(D - d)/L
(D - d)/2
D - d
What is the welding defect caused due to improper control and poor removal of slog between passes called?
Mismatch
Under fill
Crack
Porosity
The tail stock set over method of taper turning is preferred for
Internal tapers
Small tapers
Long slender tapers
Steep tapers