# Finite Element Methods Mid - I, September - 2014

###### 1.The determinant of an element stiffness matrix is always
• One
• zero
• depends on size of [K]
• Two
Answer: B
###### 2.Example for plane stress problem is
• Strip footing resting on soil mass
• a thin plate loaded in a plane
• a long cylinder
• a gravity dam
Answer: B
• Pressure
• Traction
• Stiffness
• None
Answer: C
###### 4.Discrete analysis covers
• All 2-D trusses & frames
• all 3-D trusses & frames
• All 2-D and 3-D trusses & frames
• no trusses; only frames
Answer: C
###### 5.Displacement method of FEM for structural analysis gives
• Stiffness matrix
• flexibility matrix
• Conductance matrix
• mixed matrix
Answer: A
###### 6.Transformation matrix relates structural coordinate system in element coordinate system with
• Displacements
• stresses
• Stiffness coefficients
• material properties
Answer: D
###### 7.A singular stiffness matrix means
• Unstable structure
• one or more DOF are unrestrained
• Wrong connectivity of elements
• wrong solution expected
Answer: B
###### 8.Determinant of assembled stiffness matrix before applying boundary conditions is
• < 0
• 0
• > 0
• depends on the problem
Answer: B
###### 9.A 1-0 structural element is a
• Truss element
• beam element
• pipe element
• all of them
Answer: D
###### 10.Meshing for 1-D elements is
• Essential
• optional
• Reduces input data
• depends on other data
Answer: B
###### 11.The finite element method is _________________ procedure for analyzing structures and continuum.
Answer: Numerical
Answer: ∂W=∂U
###### 13.The coordinate system which is used to specify the points in the entire structure is known as ______________
Answer: Global coordinate system.
Answer: 3
Answer: 6
Answer: Small
Answer: σ =Eε
Answer: Elements
###### 19.Stiffness matrix depends on __________________
Answer: Material and Geometry
###### 20.The force required to produce unit displacement is ___________________
Answer: Stiffness