813. A twist drill is specified by
A.Its diameter and lip angle
B.Shank, material and diameter
C.It shank and diameter
D.Shank, material and flute size

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814. All straight-shanked drills used in drill press work must be hold in the
A.Spindle of the drill press
B.Key type drill chuck
C.Tapers sleeve
D.Vise

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815. Point angle of 118° on drills is used for
A.All general applications on mild steel
B.Bakelite, hard rubber and fibrous plastics
C.Hard steel and nickel alloys
D.Thin steel metal

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816. Cutting fluid in drilling operation is used to
A.Cool the drill
B.Aid in rapid removal of chips
C.Improve the finish of the drilled hole
D.All of the above

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817. The work is usually rotated while the drill is fed into the work in
A.Hand drilling machine
B.Radial drilling machine
C.Deep hole drilling machine
D.Multiple spindle drilling machine

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818. Point angle of 135° on drills is used for
A.All applications on M.S.
B.Hard steels and nickel alloys
C.Bakelite, hard rubbers and fibrous plastics
D.Both (B) and (C) above

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819. For drilling aluminium, a drill with
A.High helix angle is required
B.Low helix angle is required
C.Any helix angle can be used
D.Zero helix angle is required

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