Engineering Materials
Which of the following metal is used in making electrical resistance wire for electric furnaces and heating elements?

Monel metal
Nichrome
Babbitt metal
Phosphor bronze

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Engineering Materials
Carbon steel is

Extensively used for making cutting tools
Refined from cast iron
An alloy of iron and carbon with varying quantities of phosphorus and sulphur
Made by adding carbon in steel

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Engineering Materials
Thermoplastic materials are those materials which

Are flexible and can withstand considerable wear under suitable conditions
Are used as a friction lining for clutches and brakes
Do not become hard with the application of heat and pressure and no chemical change occurs
Are formed into shape under heat and pressure and results in a permanently hard product

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Engineering Materials
Cyaniding is the process of

Obtaining cyanide salts
Dipping steel in cyanide bath
Adding carbon and nitrogen by heat treatment of steel to increase its surface hardness
Reacting steel surface with cyanide salts

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Engineering Materials
Pick up wrong statement about wrought iron

It melts at 1535°C
It contains carbon of the order of 0 to 0.25%
It is made by adding suitable percentage of carbon to molten iron and subjecting the product to repeated hammering and rolling
It is very soft and ductile

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