The number of independent equations to be satisfied for static equilibrium of a plane structure is__________________?

A. is increased
B. is decreased
C. remains unchanged
D. becomes zero

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. 8 kN.m
B. 15 kN.m
C. 30 kN.m
D. 60 kN.m

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

A. the head of the load reaches the section
B. the tail of the load reaches the section
C. the load position should be such that the section divides it equally on both sides
D. the load position should be such that the section divides the load in the same ratio as it divides the

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