Structural Analysis

i) of a stiffness matrix must be positive
ii) of a stiffness matrix must be negative
iii) of a flexibility matrix must be positive
iv) of a flexibility matrix must be negative
The correct answer is
A. (i) and (iii)
B. (ii) and (iii)
C. (i) and (iv)
D. (ii) and (iv)

A. a unit force is applied at coordinate j and the displacements are calculated at all coordinates
B. a unit displacement is applied at co-ordinate j and the forces are calculated at all coordinates
C. a unit force is applied at coordinate j and the forces are calculated at all coordinates
D. a unit displacement is applied at co-ordinate j and the displacements are calculated at all co-ordinates

i) bending moment
ii) shear force
iii) axial force
The correct answer is
A. only (i)
B. (i)and(ii)
C. (ii) and (iii)
D. (i), (ii) and (iii)

A. 1
B. 2
C. 3
D. 6

A. m + r + 2j
B. m – r + 2j
C. m + r – 2j
D. m + r – 3j

A. 2
B. 3
C. 6
D. 8

A. three linear movements
B. two linear movements and one rotation
C. one linear movement and two rotations
D. three rotations

A. (m + r)<2j
B. m + r = 2j
C. (m + r)>2j
D. none of the above
where m is number of members, r is reaction components and j is number of joints

A. 2
B. 3
C. 4
D. 6

A. m + r – 2j
B. m + r – 3j
C. 3m + r – 3j
D. 6m + r – 6j
where m, r and j have their usual meanings