WorksheetsMCQ/QA
Total questions: 20
Worksheet time: 2hrs 40mins
The rise in temperature due to flow of chip against friction on the tool rake face
Primary deformation zone
Secondary deformation zone
Tertiary deformation zone
All the mentioned points
Usually no cutting fluid is used in________ process
Shaping
Broaching
Thread rolling
Honing
Cutting fluids are used to__________
cool the tool and workpiece
cool the machine
form as protective layer to workpiece
form as protective layer to workpiece
The cutting fluid mostly used for machining is_______
soluble oil
water
Dry
heavier oil
The carbide tools operating at very low cutting speeds (below 30 m/min)
Reduces tool life
Increases tool life
Have no effect on tool life
Spoils the work piece
The best example of semi solid lubricant is
Grease
Graphite
Castor oil
Hard oil
Which one of the following is the reason that tap water is not preferred as coolant on machine too ?
Danger of corrosion
It decreases cutting action of the tool
It has insufficient cooling effect
Due to high cooling effect the cutting edges of the tool break off
Which one of the following is known for machining without any coolant
Dry machining
Wet machining
Mist machining
Semi-solid machining
______ are used to separate the tramp oil (sump oil) from coolant
Skimmers
Magnetic separators
Rotating spindles
All of the above
Why metal removal process is costly?
both more energy is required and some of the material is wasted
more energy is required
some of the material is wasted
none of the mentioned
In metal machining, the zone where the maximum heat is generated due to the plastic deformation of metal, is called__________.
shear zone
work-tool contact zone
friction zone
none of mentioned points
Which is effect of cutting temperature on workpiece
Dimensional inaccuracy
Burning
Micro-cracks at the surface
All of the mentioned points
By increasing cutting speed, amount of heat generated
Increases
Decreases
Remains constant
None of the mentioned
Thermal conductivity of cutting tool must be________.
High
Low
Very low
None of these
Cutting a groove around a cylindrical work piece on the Lathe is called___________.
Necking
Turning
Grinding
Milling
The ability of the tool material to retain its hardness even at elevated temperature
Wear Resistance
Hot Hardness
Toughness
Coefficient of thermal expansion
Which of the following cutting conditions greatly affects the tool wear?
Cutting speed
Feed
Depth of cut
None of the above
Tool life in orthogonal cutting is_________.
less than the tool life in oblique cutting
more than the tool life in oblique cutting
equal to the tool life in oblique cutting
either more or less than the tool life in oblique cutting
Which of the following has poor shock resistant?
Ceramics
HSS
Diamonds
Carbides
“High compressive strength with negative rake” – this is applicable to_____
Carbides
diamonds
carbon steel
HSS
