MANUFACTURING AND PRODUCTION TECHNOLOGY QUIZ

Coarse grained grinding wheel is used

Medium grained grinding wheel is used

Fine grained grinding wheel is used

Any one of these

Wheel is too hard or wheel revolves at a very high speed

Wheel is too hard and wheel revolves at very slow speed

Wheel is too soft and wheel revolves at a very high speed

Wheel is too soft or wheel revolves at a very slow speed

It removes large amount of material

It is best suited for machining hard and brittle materials.

It cuts materials at very slow speeds

It produces good surface finish

The surface milled appears to be slightly wavy.

The coolant can be poured directly at the cutting zone where the cutting force is maximum.

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.

7.5 m/min

15 m/min

3.75 m/min

5 m/min

Type of material to be drilled

Quality of surface finish desired

All of these

Material of drill

Silicon carbide

Aluminium oxide

Sand stone

Diamond

20

10

30

40

High speed of wheel

High temperature developed at the contact of the wheel face and work

Low speed of wheel

Grinding hard work

Strength of the metal decreases but ductility increases

Both strength and ductility of the metal increases

Strength of the metal increases but ductility decreases

Both strength and ductility of the metal decreases