Mechanical Properties of Materials

Energy stored within elastic limit is

• toughness

• resilience

• modulus of elasticity

Young's Modulus is measure of

• hardness

• stiffness

• ductility

• strength

% elongation is

• measure of malleability

• measure of hardness

• measure of ductility

• all of these

strength of the material depends on

• load applied on the material

• shape & size of the component

• both the options are correct

• none of the options are correct

Hardness of thin hard sample is measured by

• Brinell Hardness Test

• Knoop Hardness Test

Which Rockwell scale is used to measure hardness of Hard steel sample?

• Scale A

• Scale B

• Scale C

What is the indentor used in Rockwell B scale

• 120 degree diamond cone

• 136 degree square based diamond prism

• steel ball

• None of these

Which of the following is true?

• true stres is more than eng. stress but true strain is less than eng. strain

• true stres is less than eng. stress and true strain is less than eng. strain

• true stres is more than eng. stress and true strain is more than eng. strain

• true stres is less than eng. stress but true strain is more than eng. strain

If the % elongation of a sample is found to be 10

• material is ductile

• material is brittle

There will be no volume change of the material if Poisson's ratio is

• 0

• negetive

• 0.5

• 1