S&C Structures L12

The SI unit for force is ...

• Tonnes

• Newtons

• Kelvins

• Ohms

Strain is usually cause by tensile forces acting on a material. What two factors determine how large the strain is?

• Material, Tensile compression

• Materials' density, compressive force

• Material, force size

• Material mass, compression

Stress can be calculated. It is dependent on the size of the force and what?

• Thickness of the material

• Length of the material

• Variance in the material

• Cross-sectional area of the material

Torsion can be described as what type of force?

• Twisting

• Bending

• Splitting

• Pulling

Stress-strain graphs show information about a material. What does the first section show?

• Elastic region

• Plastic region

• Yield point

• Ultimate strength

A material that produces a straight line, almost vertical, on a stress-strain graph would show what type of material?

• Ductile

• Elastic

• Plastic

• Brittle

What does the following notation mean- MN?

• Milli Newtons

• Mega Newtons

• Milli Nannites

• Mega Nannites

A compressive force is when two objects are ...

• pulling away

• pushing against

• sliding across

• cutting from

The yield point on a stress-strain graph describe when a material undergoes what?

• temporary deformation, without failure

• permanent deformation, without failure

• permanent deformation, with failure

• temporary deformation, with failure

Ultimate tensile stress is the point at which what happens to a material?

• It breaks or fails.

• It bends and doesn't return to it's original shape.

• It returns to it's original shape after the force is removed.

• It bends.