Material Testing Lab Online Viva

A tension test experiment is

• Destructive test

• Constructive test

• Hardness test

• Flexure test

What is the unit of strength

• N

• N/m²

• N/mm²

• MPa

In Rockwell hardness experiment, the value obtained is 45HRB. What is the letter B indicates

• Brass

• Brown specimen

• B Scale

• Medium hardness

In Izod impact test, what is the position of the notch on the specimen

• Bottom of the specimen

• Tension side of the specimen

• side of the specimen

• Top of specimen

What is the standard value of modulus of rigidity of mild steel

• 80MPa

• 8 MPa

• 80 GPa

• 8 GPa

What is the relationship between Youngs modulus E and shear modulus N. ν is the Poisson's ratio

• E=2N(1+ν)

• E=2N(1-ν)

• E=N(1-2ν)

• E=N(1+2ν)

In a torsion experiment, what kind of stress is formed during torsion

• Tensile stress

• Shear stress

• Compressive stress

• Hardness

Resistance to abrasion is called

• Hardness

• Compressive strength

• Torsional rigidity

• Toughness

Ratio of change in dimension to original dimension is

• stress

• Strain

• Strength

• Poisson raio

Name a horizontal linear structural element which carries load

• Column

• Beam

• Slab

• Roof