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Chapter:

16. Which of following grinding machine will give a better result for finish machining operation?

Fine grain Medium grain Coarse grain None of the mentioned

Coarse grain

Fine grain wheel will give smaller metal removal rate and hence better for finishing operations.

Hint Answer

17. Which of following symbol’s range of alphabet represent soft grain in grinding wheel?

A – H I – P Q – T T – Z

A – H

A-H represents soft grains in grinding wheel.

Hint Answer

18. Which of following grinding wheel would be more economical for grinding of hard work piece?

Soft grinding wheel Hard grinding wheel Both hard and soft grinding wheel None of the mentioned

Soft grinding wheel

In soft grinding wheels, during machining of hard work piece glazing will occur after long time.

Hint Answer

19. Which of following specified grinding wheel will have Zirconia abrasive?

Z 46 K 5 B 17 C 600 K 5 B 17 C 8 K 5 B 17 A 80 K 5 B 17

Z 46 K 5 B 17

First place of ISO designation of grinding wheel represents grain type and “Z” represents Zirconia.

Hint Answer

20. Friability of grinding wheel is associated to

Hardness Fracture Size None of the mentioned

Fracture

Friability is ability to fracture under pressure so that when cutting edge become dull, grain breaks off and exposes new grains which are sharp.

Hint Answer

21. Which of following is correct range for grain number of grinding wheel for medium grains?

220-600 80-180 30-60 10-24

30-60

For medium grain, grain number ranges from 30 to 60.

Hint Answer

22. Which of following has open structure?

A 46 K 5 B 17 C 600 K 8 B 17 C 8 K 5 3 17 A 80 K 4 B 17

C 600 K 8 B 17

Fourth place of ISO designation of grinding wheel represents Structure and “8” comes under open structure.

Hint Answer

23. Resin bond is also known

Vertified bond Rubber bond Silicate bond Bakelite bond

Bakelite bond

Resin bond is also known as Bakelite bond and is represented by symbol ‘B’. Fifth place of ISO designation of grinding wheel represents type of bond.

Hint Answer

24. Which of following grinding wheel would be more economical for grinding of soft work piece?

Soft grinding wheel Hard grinding wheel Both hard and soft grinding wheel None of the mentioned

Hard grinding wheel

In hard grinding wheels, during machining of soft work piece glazing will occur after long time and grains of grinding wheel will be effectively utilized before coming out from wheel.

Hint Answer

25. Which of following process have lowest metal removal rate?

Drilling Reaming Milling Honing

Honing

Honing is a surface finishing operation and hence have low metal removal rate.

Hint Answer

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All Chapters

View all Chapter and number of question available From each chapter from Manufacturing-engineering-I

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Ferrous Metal, Non-Ferrous Metal and Heat Treatment

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Magnetic Properties of Material, Electrical Properties of Materials, Plastics, Ceramics and Composites

Metal Cutting

Cutting-Tool Materials and Cutting Fluids

Cutting-Tool Materials and Cutting Fluids

Lathe Machines, Shaping and Slotting

Lathe Machines, Shaping and Slotting

Milling, Drilling and Reaming

Milling, Drilling and Reaming

Grinding, Surface Finishing Operations and Unconventional Machining Processes

Grinding, Surface Finishing Operations and Unconventional Machining Processes

Metrology, Welding, Fusion-Welding Processes and Unconventional Welding Methods

Metrology, Welding, Fusion-Welding Processes and Unconventional Welding Methods

Powder Metallurgy, NC Part Programming and Metal Casting and Gating Systems

Powder Metallurgy, NC Part Programming and Metal Casting and Gating Systems

Forming, Metal Forming Processes and Heat Transfer

Forming, Metal Forming Processes and Heat Transfer

Jigs and Fixture, Applications and Gears

Jigs and Fixture, Applications and Gears

Topics

This Chapter consists of the following topics

Grinding

Surface Finishing Operations and Unconventional Machining Processes

Which of following grinding machine will give a better result for finish machining operation?

Which of following symbol’s range of alphabet represent soft grain in grinding wheel?

Which of following grinding wheel would be more economical for grinding of hard work piece?

Which of following specified grinding wheel will have Zirconia abrasive?

Friability of grinding wheel is associated to

Which of following is correct range for grain number of grinding wheel for medium grains?

Which of following has open structure?

Resin bond is also known

Which of following grinding wheel would be more economical for grinding of soft work piece?

Which of following process have lowest metal removal rate?

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