A) Pin/roller supports resist ____________________.
- rotation
- displacement
- rotation and displacement
- none of the above
(B) Inflection points occur where ____________________.
- displacement equals zero
- displacement is at a maximum
- curvature equals zero
- curvature is at a maximum
(C) Curvature (1/%u03C1) has units of ________________.
- distance-1
- distance
- distance2
- distance3
(D) Boundary conditions reflect a known _____________________. Boundary conditions usually are found at _____________.
- value of slope/displacement at a given point; supports
- value of slope/displacement at a given point; concentrated external loads
- relationship between slope/displacement at two different points; supports
- relationship between slope/displacement at two different points; boundaries between
- equations defining the slope/displacement along a beam
- none of the above
(E) Continuity conditions reflect a known _____________________. Continuity conditions usually are found at _____________.
- value of slope/displacement at a given point; supports
- value of slope/displacement at a given point; concentrated external loads
- relationship between slope/displacement at two different points; supports
- relationship between slope/displacement at two different points; boundaries between
- equations defining the slope/displacement along a beam
- none of the above
(F) Theconstantsofintegrationrepresent
- The initial slope/displacement of the function at the beginning of its applicable domain
- The flexural rigidity of the beam
- The area underneath the displacement curve
- None of the above
(G) To determine the elastic curve equations for a statically indeterminate beam, the internal moment must be expressed in terms of ____________________.
- unknown redundant support reactions
- itself
- boundary conditions
- none of the above
(H) Unknown support reactions will _________ be solvable using boundary conditions and/or continuity conditions.
- never
- sometimes
- always
- none of the above
(I) Once the unknown redundant reactions are solved for, the moment function can be determined by using ________________.
- the method of sections and statics
- calculus
- trial and error
- none of the above
(J) The number of redundant support reactions required is equal to the _____________________ the system.
- number of equations required to describe the internal moment in
- number of supports minus one in
- degree of indeterminacy of
- none of the above
(K) The %u201Ccritical load%u201D for a column is ______________________________.
- the lateral load required to buckle a column
- the yield strength of a column
- the maximum tensile axial load that a column can support while on the verge of buckling
- the maximum compressive axial load that a column can support while on the verge of buckling
(L) A column is made of a material with a yield stress of 50 ksi. If the buckling stress is calculated to be 75 ksi, which failure mode will occur first?
- Yielding
- Buckling
- Fracture
- None of the above
(M) A designer wants to increase the buckling resistance of a fixed-fixed column. Which of the following would not increase Pcr?
- change the supports/fixity
- change to a material with a higher modulus of elasticity
- change to a section with a larger moment of inertia
- brace the column at an intermediate point
(N) About which axis will a column buckle?
- the axis with the least moment of inertia
- the axis with the largest effective slenderness ratio
- the axis with the least fixity
- none of the above