729. Reaming is the operation of
A.Enlarging the end of a hole cylindrically
B.Cone shaped enlargement of the end of a hole
C.Smoothing and squaring the surface around a hole
D.Sizing and finishing a hole

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730. Which of the following is fastest method of cutting gears
A.Milling
B.Gear shaping
C.Gear hobbing
D.Gear burnishing

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731. Hard ferrous metals like steel and cast iron are cut with following medium size grit cut off wheels
A.Al2O3
B.Si C
C.Diamond grit
D.Garnet

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732. In grinding operation, for grinding harder material
A.Coarser grain size is used
B.Fine grain size is used
C.Medium grain size is used
D.Any grain size may be used

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733. Which of the following abrasives will be selected for grinding tool steel and high speed steel
A.Diamond
B.Al2O3
C.Si C
D.Boron carbide

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734. Which abrasive particle would you choose for grinding bronze valve bodies
A.Silicon carbide
B.Aluminium oxide
C.Diamond
D.Cubic boron nitride

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735. Which abrasive particle would you choose for grinding high speed steel tools
A.Silicon carbide
B.Aluminium oxide
C.Diamond
D.Cubic boron nitride

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