Ability of a material to retain the deformation permanently is called

1.  stiffness

2.  ductility

3.  hardness

4.  plasticity

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4
Correct Answer :

plasticity


Explanation :
No Explanation available for this question

Ability of a material to resist penetration by another material, is called

1.  stiffness

2.  ductility

3.  hardness

4.  plasticity

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4
Correct Answer :

hardness


Explanation :
No Explanation available for this question

Property of material due to which it can be rolled or hammered into thin sheets is called

1.  brittleness

2.  ductility

3.  malleability

4.  fatigue

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4
Correct Answer :

malleability


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No Explanation available for this question

Property of material due to which it breaks with little permanent distortion is called

1.  brittleness

2.  ductility

3.  malleability

4.  fatigue

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4
Correct Answer :

brittleness


Explanation :
No Explanation available for this question

Property of material due to which recovery after unloading is complete but instantaneous, is called

1.  elasticity

2.   plasticity

3.  anelasticity

4.  enelasticity

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4
Correct Answer :

anelasticity


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In material subjected to fluctuating or repeated stress, fracture takes place under a stress whose maximum value is less than the tensile strength of the material. This phenomenon is called

1.  fatigue

2.  creep

3.  malleability

4.  resilence

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4
Correct Answer :

fatigue


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If a material sustains steady loads for long periods of time, the material will continue to deform until they may tend to fracture under the same load. This phenomenon is called

1.  fatigue

2.  creep

3.  malleability

4.  resilience

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4
Correct Answer :

creep


Explanation :
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Hardness can be defined as resistance to

1.  wear

2.  local penetration

3.  scratching

4.  all of these

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4
Correct Answer :

all of these


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If a material is heated, its toughness

1.  increases

2.  decreases

3.  remains same

4.   none  of these

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4
Correct Answer :

decreases


Explanation :
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Machinability of metals depends upon

1.  tensile strength

2.  toughness

3.  hardness

4.  both (a) and (b)

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4
Correct Answer :

both (a) and (b)


Explanation :
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