Related Questions

The cutting speed for drilling aluminium, brass and bronze with carbon steel drills is _________ cutting speed for drilling mild steel with high speed steel drills.
A Equal to
B Less than
C More than
D None of these
In drilling brass, a drill with
A Zero helix angle is used
B Low helix angle is used
C High helix angle is used
D Any helix angle can be used
The point angle of a drill, for drilling stainless steel, is
A 90°
B 118°
C 135°
D 150°
The depth of cut in drilling is __________ the drill diameter.
A Equal to
B One-fourth
C One-half
D Double
In drilling Bakelite and fibrous plastics, the point angle of a drill is
A 90°
B 118°
C 135°
D 150°
The helix angle of a drill is __________ for drilling brass.
A Equal to 30°
B Less than 30°
C More than 30°
D None of these
A drill mainly used in drilling brass, copper or softer materials, is
A Flat drill
B Straight fluted drill
C Parallel shank twist drill
D Tapered shank twist drill
The cutting speed for drilling aluminium, brass and bronze with high speed steel drills varies from
A 10 to 20 m/min
B 18 to 30 m/min
C 24 to 45 m/min
D 60 to 90 m/min
Aluminium bronze contains aluminium and copper in the ratio of
A 50 : 50
B 40 : 60
C 60 : 40
D 10 : 90
The machinability of aluminium increases when _________ is added to aluminium.
A Copper
B Magnesium
C Silicon
D Lead and bismuth

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