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Engineering Materials

Engineering Materials
An engineer's hammer is made of

Forged steel
Cast iron
Mild steel
High carbon steel

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Engineering Materials
The machinability of aluminium increases when _________ is added to aluminium.

Silicon
Lead and bismuth
Magnesium
Copper

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Engineering Materials
Free cutting steels

Contain carbon in free from
Is used where rapid machining is the prime requirement
Require minimum cutting force
Can be cut freely

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Engineering Materials
Preheating is essential in welding

All nonferrous materials
Cast iron
High speed steel
All of these

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Engineering Materials
Induction hardening is basically a

Surface hardening process
None of these
Core hardening process
Carburising process

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Engineering Materials
The surface hardness of the following order is achieved by nitriding operation

1500 VPN
250 VPN
600 VPN
1000 to 1100 VPN

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