Question

When the area of contact between wheel and work is small, then following grade should be used for grinding wheel?

1 point
A.Harder
B.Hardest
C.Medium
D.Softer​

Answer 1

Answer:

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Answer 2

Explanation:

D . Softer

Selection of Grinding Wheels:

The proper selection of grinding wheels is very important for getting good results. In order to meet all these requirements, the various elements that influence the process must be considered.

Selection mainly depends upon the following factors:

(a) Constant factors.  

(b) Variable factors.

Constant factors include:  

(i) Work material. It should be remembered that for grinding a soft material, hard wheel should be used and vice versa,

(ii) Amount and rate of stock removal,  

(iii) Area of contact between work and wheel.  

(iv) Condition of grinding machine. A softer grade of wheel is used on robust and heavy machine.

(v) Finish and accuracy required on the job.

Variable factors include:

(i) Wheel speed,

(ii) Work speed,

(iii) Condition of grinding machine

(iv) Skill of operator