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
3.The Force required to produce unit displacement is

Pressure

Traction

Stiffness

None

Answer: C
4.Discrete analysis covers

All 2D trusses & frames

all 3D trusses & frames

All 2D and 3D 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 10 structural element is a

Truss element

beam element

pipe element

all of them

Answer: D
10.Meshing for 1D 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
12.The principle of virtual work is given by ___________
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.
14.How many nodes have in a triangle _______________
Answer: 3
15.A triangular plane stress element has _______________D.O.F
Answer: 6
16.The plane stress problem is characterized by very ________________ dimensions in one of the normal directions.
Answer: Small
17.The stress strain relation for 1 D element is ________________
Answer: σ =Eε
18.In FEM the complex domain defining a continuum is divided into _______________
Answer: Elements
19.Stiffness matrix depends on __________________
Answer: Material and Geometry
20.The force required to produce unit displacement is ___________________
Answer: Stiffness