Engineering Materials - Study Mode

[#56] Y-alloy contains
Correct Answer

(B) 3.5 to 4.5% copper, 1.2 to 1.7% manganese, 1.8 to 2.3% nickel, 0.6% each of silicon, magnesium and iron, and rest aluminium

Explanation

Solution: Y-alloy contains 3.5 to 4.5% copper, 1.2 to 1.7% manganese, 1.8 to 2.3% nickel, 0.6% each of silicon, magnesium and iron, and rest aluminium

[#57] Wrought iron
Correct Answer

(D) All of these

Explanation

Solution: Wrought iron is an iron alloy with very low carbon content with respect to cast iron. It is soft, ductile, magnetic, and has high elasticity and tensile strength. It can be heated and reheated and worked into various shapes.

[#58] White cast iron
Correct Answer

(B) Is also known as chilled cast iron and is obtained by cooling rapidly. It is almost unmachinable

Explanation

Solution: White cast iron Is also known as chilled cast iron and is obtained by cooling rapidly. It is almost unmachinable. White cast iron is a cast iron without any alloy addition and with low C and Si content such that the structure is hard brittle iron carbide with no free graphite. A fast cooling rate prevents the precipitation of C as graphite.

[#59] When the steel is normalized, its
Correct Answer

(D) All of these

Explanation

Solution: When the steel is normalized, its Yield point increases, Ductility decreases and Ultimate tensile strength increases.

[#60] Amorphous material is one
Correct Answer

(B) In which there is no definite atomic structure and atoms exist in a random pattern just as in a liquid

Explanation

Solution: Amorphous material is one In which there is no definite atomic structure and atoms exist in a random pattern just as in a liquid