ENGINEERING MATERIALS QUIZ

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

Magnesium

Lead and bismuth

Silicon

Copper

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Hardness of upper bainite (acicular structure) is about

RC 48

RC 57

RC 65

RC 80

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The property of a material essential for spring materials is

Resilience

Ductility

Stiffness

Plasticity

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The stiffness is the ability of a material to resist

None of these

Externally applied forces with breakdown or yielding

Deformation under stress

Fracture due to high impact loads

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The material widely used for making pendulums of clocks is

Heat resisting steel

Stainless steel

High speed steel

Nickel steel

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Which of the following material has maximum ductility?

Copper

Nickel

Aluminium

Mild steel

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The ability of a material to absorb energy in the plastic range is called

Creep

Toughness

Fatigue strength

Resilience

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Admiralty gun metal contains

Alloy of tin, lead and cadmium

Iron scrap and zinc

63 to 67% nickel and 30% copper

88% copper, 10% tin and rest zinc

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The bond formed by transferring electrons from one atom to another is called

None of these

Covalent bond

Metallic bond

Ionic bond

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For a steel containing 0.8% carbon

There are two critical points

There is only one critical point

There is no critical point

There can be any number of critical points

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