Engineering Materials MCQ with Answers

81) Killed steels

Answer is:

are free from oxygen

Explanation:

When steel has been fully deoxidized before casting and no gas was evolved during solidification, the resultant steel is known as killed steel. It is combined with an agent like casting before use. This steel is called "killed" because it quietly solidifies in the mold and no gas evolves.

82) An alloy steel which is work hardenable and which is used to make the blades of bulldozers, bucket wheel excavators and other earth moving equipment contain iron, carbon and

Answer is:

manganese

83) connecting rod is, usually made from

Answer is:

medium carbon steel

Explanation:

Connecting rod is, usually, made from Medium carbon steel

84) The alloying element which can replace tungsten in high speed steels is

Answer is:

molybdenum

85) Free cutting steels

Answer is:

81) Killed steels

are free from oxygen

82) An alloy steel which is work hardenable and which is used to make the blades of bulldozers, bucket wheel excavators and other earth moving equipment contain iron, carbon and

manganese

83) connecting rod is, usually made from

medium carbon steel

84) The alloying element which can replace tungsten in high speed steels is

molybdenum

85) Free cutting steels

is used where rapid machining is the prime requirement