820. For drilling glass, slate, ceramic and masonry, following drill is used
A.Twist drill
B.Spade bit
C.Tungsten carbide-tipped bit
D.Auger

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821. When the lip clearance of a drill is too small, i.e. when it requires resharpening
A.It will drill a bigger hole
B.Drill will not be able to enter the work
C.It will drill and elliptical hole
D.It will drill a rough hole

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822. The twist drill works by
A.Being forced through the material
B.Rotating against the material with sufficient pressure to cause it to penetrate the material
C.Rotating against the material and being pulled through by spiral of the flutes
D.All of the above

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823. The rake angle of single point cutting tool is equivalent to
A.Helix angle of a twist drill
B.The lip angle of twist drill
C.End cutting edge angle of a twist drill
D.The relief angle of a twist drill

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824. For drilling brass, 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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825. To provide a positive drive, all taper shanked drills are provided with
A.Sleeve
B.Socket
C.Tang
D.Neck

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826. If a drill does not cut, the probable cause could be that
A.Material is hard
B.Speed is low
C.No lubricant is used
D.Drill is blunt

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