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Quiz 6
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Q.1
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
Q.2
In hot machining, tool is made of
Tungsten carbide
Brass or copper
Diamond
Stainless steel
Q.3
A dynamo-meter is a device used for the measurement of
Chip thickness ratio
Forces during metal cutting
Wear of the cutting tool
Deflection of the cutting tool
Q.4
The structure of a grinding wheel depends upon
Hardness of the material being ground
Nature of the grinding operation
Finish required
All of these
Q.5
The grade of grinding wheel depends upon
Hardness of the material being ground
Speed of wheel and work
Condition of grinding machine
All of these
Q.6
The hole to be drilled for tapping is _________ the outside diameter of the thread on the tap.
Equal to
Smaller than
Greater than
None of these
Q.7
In centreless grinding, the surface speed of regulating wheel is
5 to 15 m/min
15 to 60 m/min
60 to 90 m/min
90 to 120 m/min
Q.8
The size of a shaper is given by
Stroke length
Motor power
Mass of machine
Rate size
Q.9
In drilling softer materials, the cutting speed is ___________ as compared to harder materials.
Same
Low
High
None of these
Q.10
Lathe bed is made of
Mild steel
Alloy steel
Pig iron
Chilled cast iron
Q.11
Gear lapping is an operation
After heat treatment
Prior to heat treatment
For gear reconditioning
None of these
Q.12
In a particular type of welding, flux is prepared in the form of a coarse powder and granulated flux is spread over the joint. What is this type of welding process called?
Electric arc welding
Submerged arc welding
MIG welding
TIG welding
Q.13
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
Q.14
The usual value of the helix angle of a drill is
20°
30°
45°
60°
Q.15
The process of improving the cutting action of the grinding wheel is called
Truing
Dressing
Facing
Clearing
Q.16
A solid cylinder of diameter 100 mm and height 50 mm is forged between two frictionless flat dies to a height of 25 mm. The percentage change in diameter is
0
2.07
20.7
41.4
Q.17
In oblique cutting of metals, the cutting edge of the tool is
Perpendicular to the workpiece
Perpendicular to the direction of tool travel
Parallel to the direction of tool travel
Inclined at an angle less than 90° to the direction of tool travel
Q.18
In drilling Bakelite and fibrous plastics, the point angle of a drill is
90°
118°
135°
150°
Q.19
The usual value of the point angle of a drill is
70°
100°
118°
130°
Q.20
The guide-ways are of
Flat type
V-type
Dovetail type
Any one of these
Q.21
The method of grinding used to produce internal cylindrical holes and tapers, is
Internal cylindrical grinding
Form grinding
External cylindrical grinding
Surface grinding
Q.22
Glazing in grinding wheels takes place when the
Wheel is too hard or wheel revolves at a very high speed
Wheel is too soft or wheel revolves at a very slow speed
Wheel is too hard and wheel revolves at very slow speed
Wheel is too soft and wheel revolves at a very high speed
Q.23
The abrasive slurry used in ultrasonic machining contains fine particles of
Aluminium oxide
Boron carbide
Silicon carbide
Any one of these
Q.24
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
Q.25
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
Q.26
If the diameter of the hole is subject to considerable variation, then for locating in jigs and fixtures, the pressure type of locator used is
Conical locator
Cylindrical locator
Diamond pin locator
Vee locator
Q.27
The tool life is affected by
Depth of cut
Cutting speed
Feed
All of these
Q.28
Which of the following is the correct data structure for solid models?
Solid part - faces - edges - vertices
Solid part - edges - faces - vertices
Vertices - edges - faces - solid parts
Vertices - faces- edges - solid parts
Q.29
The cutting fluid mostly used for machining alloy steels is
Water
Soluble oil
Dry
Sulphurised mineral oil
Q.30
What is the welding defect caused due to improper control and poor removal of slog between passes called?
Mismatch
Under fill
Crack
Porosity
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