Engineering Structures

 

Branch of mechanics that studies forces on an object in static equilibrium

• Dynamics

• statics

• kinematics

• Mechanics

A quantity that has both magnitude and direction.

• Scalar

• Dynamics

• Tensor

• Vector

Defined as the force acting on a body in its axial positive direction.

• Axial stress

• Axial strain

• Axial tension

• Axial Compression

Which statement about these pictures is true?

• The top picture shows unbalanced forces and the bottom shows balanced forces

• Both pictures are in static equilibrium

• There is acceleration in the top picture

• There is acceleration in the bottom picture

On a principal plane, shear stress is

• Maximum

• Minimum

• Zero

• Either maximum or minimum

Mohr's circle becomes a point under

• Pure shear

• hydrostatic state of

  stress

• pure

  torsion

• none of the above

Which of these cannot undergo deformation?

• A piece of wood

• Cork

• Rigid body

• Hydrogen gas

What is the unit of stress?

• Newton

• pascal

• Einstein

• Newton meter

When a body is subjected to a direct tensile stress (σ) in one plane, then maximum normal stress occurs at a section inclined at __________ to the normal of the section.

• 30°

• 0°

• 45°

• 90°

How many rectangular stress components, out of the

total 9 components, are independent?

• 2

• 3

• 6

• 9