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
__________ can replace tungsten in high speed steel,
A Chromium
B Vanadium
C Cobalt
D Molybdenum
__________ can replace tungsten in high speed steel.
A Chromium
B Vanadium
C Cobalt
D Molybdenum
Tungsten in high speed steel is responsible for its
A Toughness & wear resistance
B Cold hardness
C Hot hardness
D Sharp cutting edge
High speed steel drills can be operated at about _________ the speed of high carbon steel drills.
A One-half
B One-fourth
C Double
D Four times
For machining a mild steel workpiece by a high speed steel tool, the average cutting speed is
A 5 m/min
B 10 m/ min
C 15 m/min
D 30 m/min
The average cutting speed for turning mild steel with a high speed steel tool is
A 15 to 19 m/min
B 25 to 31 m/min
C 60 to 90 m/min
D 90 to 120 m/min
High speed cutting tool steels contain about __________ percent of tungsten.
A 6-8
B 18-20
C 30-35
D 50-55
The alloying element which can replace tungsten in high speed steels is
A Nickel
B Vanadium
C Cobalt
D Molybdenum
Tungsten in steel
A Improves wear resistance, cutting ability and toughness
B Refines grain size and produces less tendency to carburisation, improves corrosion and heat resistant properties
C Improves cutting ability and reduces hardenability
D Gives ductility, toughness, tensile strength and anti-corrosion properties

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