Brittle materials are characterized by significant plastic deformation prior to

Question

1. Brittle materials are characterized by significant plastic deformation prior to fracture. (True/False)?
2. The 'coefficient of thermal expansion' provides the relationship between temperature change and stress change. (True/False)?
3. "Tributary Area" refers to the area of floor, roof, and/or wall that a particular element is responsible for.  (True/False)?
4. For static equilibrium to be present a structural system must satisfy 2 equations of equilibrium. (True/False)?
5. Plastic deformation occurs once a member has been loaded beyond its yield point.  (True/False)?
6. The Modulus of Elasticity (E) defines the relationship between stress and strain for the entire stress-strain diagram. (True/False)?
7. The friction force which can be developed between two surfaces is expressed as a fraction of the normal force acting perpendicular between those surfaces. (True/False)?
8. In an ideal truss analysis, connections are unable to transfer moment from one member to another. (True/False)?
9. "Dead Loads" refer to all loads in a structure which are stationary. (True/False)?

Explanation / Answer

1)Brittle materials are characterized by significant plastic deformation prior to fracture- False(A material is brittle if, when subjected to stress, it breaks without significant deformation)

2)The 'coefficient of thermal expansion' provides the relationship between temperature change and stress change.- False (EXPLAINATION:The coefficient of thermal expansion describes how the size of an object changes with a change in temperature)

3)Tributary Area" refers to the area of floor, roof, and/or wall that a particular element is responsible for.-true(EXPAINATION:The area directly supported by the structural member between contiguous supports)

4)For static equilibrium to be present a structural system must satisfy 2 equations of equilibrium. -False

Explaination:it must satistfy three equation of equilibrium

5)Plastic deformation occurs once a member has been loaded beyond its yield point.-True

6)The Modulus of Elasticity (E) defines the relationship between stress and strain for the entire stress-strain diagram.-False(eXPLAINATION:The elastic modulus of an object is defined as the SLOPE of its STRESS-STRAIN CURVE in the elastic deformation region

7)The friction force which can be developed between two surfaces is expressed as a fraction of the normal force acting perpendicular between those surfaces-TRUE

8)n an ideal truss analysis, connections are unable to transfer moment from one member to another. -tRUE

9)"Dead Loads" refer to all loads in a structure which are stationary.-True(EXPLAINATION:he dead load includes loads that are relatively constant over time, including the weight of the structure itself, and immovable fixtures such as walls)

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