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For the following questions answer them individually
Carburising heat treatment is used for
Softening the metal
Refining grain structure
Hardening outer surface
Relieving internal stress
Molten steel is poured into water cooled vertical copper moulds is
Centrifugal casting
Continuous casting
Die casting
Permanent mould casting
Cast iron steel pipes are produced by
Slush casting
Investment casting
True centrifugal casting
Weld spatter defect in welding is due to:
Low voltage
High voltage
Too high welding current
Too low welding current
Tool signature comprises of
5 elements
6 elements
7 elements
8 elements
Single point thread cutting tool should ideally have
Positive rake angle
Negative rake angle
Zero rake angle
Normal rake angle
Investment casting uses pattern of
Wax
Clay
Wood
Metal
The undercutting defect in welding is due t
Faulty electrode manipulation
Faulty electrode usage
Current too high
All of the above reasons
Crater wear is predominant in
Carbon tool steel
Tungsten carbide tools
H.S.S. tools
Ceramic tools
Which of the following is not a casting defect?
Scar
Hot tear
Hot cracking
Cold shut
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