# MCQs on Grinding Wheel-1

1 - Question

Grain number of grinding wheel is ___ to grain size.
a) Directly proportional
b) Inversely proportional
c) Does not depend
d) None of the mentioned
Explanation: Grain number = 1/(grain size). Grain number is similar to density of grains on grinding wheels.

2 - Question

Which of the following is a correct range for grain number of the grinding wheel for coarse grains?
a) 220-600
b) 80-180
c) 30-60
d) 10-24
Explanation: For coarse grain, grain number ranges from 10 to 24.

3 - Question

Which of the following is the correct range for grain number of the grinding wheel for medium grains?
a) 220-600
b) 80-180
c) 30-60
d) 10-24
Explanation: For medium grain, grain number ranges from 30 to 60. advertisement

4 - Question

Which of the following is a correct range for grain number of the grinding wheel for fine grains?
a) 220-600
b) 80-180
c) 30-60
d) 10-24
Explanation: For fine grains, grain number ranges from 80 to 180.

5 - Question

Which of the following is the correct range for grain number of the grinding wheel for very fine grains?
a) 220-600
b) 80-180
c) 30-60
d) 10-24
Explanation: For very fine grains, grain number ranges from 220 to 600.

6 - Question

Which of the following grinding machine will give a better result for rough machining?
a) Fine grain
b) Very fine grain
c) Coarse grain
d) None of the mentioned
Explanation: Coarse grain wheel will give better metal removal rate and space for chip removal as rate of chip flow in rough machining is high.

7 - Question

Which of the following grinding machine will give a better result for finish machining operation?
a) Fine grain
b) Medium grain
c) Coarse grain
d) None of the mentioned
Explanation: Fine grain wheel will give smaller metal removal rate and hence better for finishing operations.

8 - Question

Which of the following symbol’s range of alphabet represent soft grain in grinding wheel?
a) A – H
b) I – P
c) Q – T
d) T – Z
Explanation: A-H represents soft grains in grinding wheel.

9 - Question

Which of the following symbol’s range of alphabet represent medium hardness grain in grinding wheel?
a) A – H
b) I – P
c) Q – T
d) T – Z
Explanation: I-P represents medium hard grains in grinding wheel.

10 - Question

Which of the following symbol’s range of alphabet represent hard grain in grinding wheel?
a) D – H
b) I – P
c) A – D
d) Q – Z