Manufacturing Engineering Multiple Choice Questions on “Grinding Wheel-1”.
1. Grain number of grinding wheel is ___ to grain size.
a) Directly proportional
b) Inversely proportional
c) Does not depend
d) None of the mentioned
Answer: b
Clarification: Grain number = 1/(grain size). Grain number is similar to density of grains on grinding wheels.
2. 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
Answer: d
Clarification: For coarse grain, grain number ranges from 10 to 24.
3. 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
Answer: c
Clarification: For medium grain, grain number ranges from 30 to 60.
4. 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
Answer: b
Clarification: For fine grains, grain number ranges from 80 to 180.
5. 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
Answer: a
Clarification: For very fine grains, grain number ranges from 220 to 600.
6. 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
Answer: c
Clarification: 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. 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
Answer: c
Clarification: Fine grain wheel will give smaller metal removal rate and hence better for finishing operations.
8. 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
Answer: a
Clarification: A-H represents soft grains in grinding wheel.
9. 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
Answer: b
Clarification: I-P represents medium hard grains in grinding wheel.
10. 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
Answer: a
Clarification: A-H represents soft grains in grinding wheel.