unit-2 Deformation of metals

What is 'load' in structural engineering?

• The deformation of a material

• The force applied on a structure

• The area of a structure

• The weight of the material

Stress is defined as:

• Force per unit volume

• Force per unit area

• Change in length per original length

• Force times area

Strain is the:

• Force applied on a material

• Stress divided by force

• Deformation per unit length

• Area divided by force

Which of the following is NOT a classification of force systems?

• Tensile

• Compressive

• Shear

• Magnetic

Tensile force causes a material to:

• Compress or shorten

• Bend sideways

• Stretch or elongate

• Twist

Compressive force causes a material to:

• Stretch

• Compress or shorten

• Twist

• Shear

Shear force acts:

• Along the length of the material

• Perpendicular to the surface

• Parallel to the surface causing sliding

• Only in liquids

Hooke’s Law states that:

• Stress is inversely proportional to strain

• Stress is directly proportional to strain within the elastic limit

• Stress is unrelated to strain

• Stress equals force times area

Young’s Modulus is the ratio of:

• Strain to stress

• Stress to strain

• Force to area

• Length to change in length

If a material has a high Young’s Modulus, it means it is:

• Very stretchy

• Very stiff

• Very brittle

• Very heavy