743. Which of the following is the natural abrasive
A.Al2O3
B.SiC
C.Borron-carbide
D.Corundum
744. Which of the following is the manufactured abrasive
A.Corundum
B.Quartz
C.Emery
D.SiC
745. Which abrasive particle would you choose for grinding steel fittings
A.Silicon carbide
B.Aluminium oxide
C.Diamond
D.Cubic boon nitride
746. Which bond is used in cut off wheels
A.Rubber
B.Vitrified
C.Resinoid
D.Shellac
747. Which of the following abrasives will be used for grinding ceramics
A.Diamond
B.Al2O3
C.SiC
D.None of the above
748. Pick up the incorrect statement about grinding
A.For cutting soft material, hard wheel is used
B.For cutting hard material, hard wheel is used
C.For grinding soft material, dry condition is required
D.For grinding hard material, wet condition is required
749. Grinding wheel is flooded with coolant in order to
A.Remove chips
B.Remove heat
C.Clean the wheel
D.Clean the job
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