Question 1

The abrasive machining processes are generally used as finishing operations:

Accepted Answer

Abrasive machining processes, such as grinding, honing, lapping, and polishing, are typically used as finishing operations to achieve high surface quality, accuracy, and tight tolerances that cannot be achieved through conventional machining processes.

Question 2

Which one of the following conventional machining processes is closest to grinding:

Accepted Answer

Milling is the closest to grinding among the options because both processes involve the removal of material from a workpiece using a rotating tool. While grinding uses a grinding wheel, milling uses a milling cutter, but both achieve fine finishes and precise shapes.

Question 3

Either the face or the periphery of the grinding wheel can be used for cutting, with face grinding being the more common operation:

Accepted Answer

peripheral grinding is more common than face grinding.

Question 4

Which one of the following is not one of the five basic parameters of a grinding wheel:

Accepted Answer

Grain hardness is not a basic parameter of a grinding wheel; the basic parameters are abrasive material, bonding material, grain size, wheel grade, and wheel structure.

Question 5

Friability refers to the capacity of the abrasive material to retain its sharpness during the grinding operation:

Accepted Answer

friability refers to the capacity of the abrasive material to fracture when the cutting edge of the grain becomes dull, thereby exposing a new sharp edge.

Question 6

Of the following abrasive materials, which one has the highest hardness:

Accepted Answer

Cubic boron nitride is second only to diamond in hardness, making it the hardest material among the options listed.

Question 7

Depth of cut in a peripheral grinding operation is called which one of the following:

Accepted Answer

In peripheral grinding, the depth of cut, which is the vertical distance the grinding wheel penetrates into the work material, is referred to as infeed.

Question 8

Smaller grain size in a grinding wheel tends to

Accepted Answer

Smaller grain size in a grinding wheel leads to a smoother surface finish because the smaller grains create less surface roughness on the material being ground.

Question 9

Which of the following would tend to give higher material removal rates:

Accepted Answer

Larger grain size in abrasive materials tends to remove more material per unit of time because the larger grains have a more pronounced cutting action compared to smaller grains. This results in higher material removal rates.

Question 10

Which of the following will improve surface finish in grinding (three best answers):

Accepted Answer

The answer of Which of the following will improve surface...

Question 11

Which one of the following abrasive materials is most appropriate for grinding steel and cast iron:

Accepted Answer

Aluminum oxide is most appropriate for grinding steel and cast iron because it is tough and has a high melting point, making it suitable for grinding these materials.

Question 12

Which one of the following abrasive materials is most appropriate for grinding hardened tool steel:

Accepted Answer

Cubic boron nitride is most appropriate for grinding hardened tool steel due to its high hardness, second only to diamond, and its thermal stability, which makes it suitable for high-temperature applications like grinding hard materials.

Question 13

Which one of the following abrasive materials is most appropriate for grinding nonferrous metals:

Accepted Answer

Silicon carbide is most appropriate for grinding nonferrous metals due to its hardness and ability to work with a wide range of materials, especially nonferrous metals which aluminum oxide might not efficiently grind due to potential loading issues.

Question 14

The specific energy in a grinding operation is much greater than the specific energy in a conventional machining operation such as milling:

Accepted Answer

Specific energy in grinding is higher due to the very small size of the chips produced and the high resistance to shear, requiring more energy per unit volume of material removed compared to conventional machining operations like milling.

Question 15

Which of the following will help to reduce the incidence of heat damage to the work surface in grinding (four correct answers):

Accepted Answer

The answer of Which of the following will help to...

Question 16

Which one of the following is the best description of the grinding ratio:

Accepted Answer

The grinding ratio is defined as the ratio of the volume of material removed from the workpiece to the volume worn away from the grinding wheel. This ratio indicates the efficiency of the grinding process, where a higher ratio means more work material is removed per unit of wheel wear, making option C the correct description.

Question 17

Which of the following terms applies to the procedure of sharpening the grinding wheel and restoring the shape of its outside perimeter:

Accepted Answer

The answer of Which of the following terms applies to...

Question 18

Which one of the following abrasive processes is capable of achieving the highest production rates:

Accepted Answer

External centerless grinding is capable of achieving the highest production rates among the options given because it allows for the continuous processing of parts without the need for resetting or individual part handling, leading to higher efficiency and productivity.

Question 19

The term deep grinding refers to which one of the following:

Accepted Answer

The answer of The term deep grinding refers to which...

Question 20

Which one of the following abrasive processes is commonly used to finish the bores of internal combustion engines:

Accepted Answer

Honing is the abrasive process commonly used to finish the bores of internal combustion engines. It effectively removes material from the surface to create a precise finish and correct the geometry of the bore.

Quiz 21: Grinding and Other Abrasive Processes