Structural Analysis Quiz practies questions test1

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1. The number of independent equations to be satisfied for static equilibrium of a plane structure is _____.
1	2
3	6

2. If there are m unknown member forces, r unknown reaction components and j number of joints, then the degree of static indeterminacy of a pin-jointed plane frame is given by _____.
m + r + 2j	m - r + 2j
m + r - 2j	m + r - 3j

3. Number of unknown internal forces in each member of a rigid jointed plane frame is ______.
1	2
3	6

4. Degree of static indeterminacy of a rigid-jointed plane frame having 15 members, 3 reaction components and 14 joints is _____.
2	3
6	8

5. Degree of kinematic indeterminacy of a pin-jointed plane frame is given by ______.
2j - r	j - 2r
3j - r	2j + r

6. Independent displacement components at each joint of a rigid-jointed plane frame are _____.
three linear movements	two linear movements and one rotation
one linear movement and two rotations	three rotations

7. If in a pin-jointed plane frame (m + r) > 2j, then the frame is _____.
stable and statically determinate	stable and statically indeterminate
unstable	none of the above

8. A pin-jointed plane frame is unstable if _____.
(m + r)<2j	m + r = 2j
(m + r)>2j	none of the above

9. A rigid-jointed plane frame is stable and statically determinate if _____.
(m + r) = 2j	(m + r) = 3j
(3m + r) = 3j	(m + 3r) = 3j

10. The number of independent equations to be satisfied for static equilibrium in a space structure is _____.
2	3
4	6

11. The degree of static indeterminacy of a pin-jointed space frame is given by _____.
m + r - 2j	m + r - 3j
3m + r - 3j	m + r + 3j

12. The degree of static indeterminacy of a rigid-jointed space frame is _____.
m + r - 2j	m + r - 3j
3m + r - 3j	6m + r - 6j

13. The degree of kinematic indeterminacy of a pin-jointed space frame is _____.
2j-r	3j-r
j-2r	j-3r

14. The number of independent displacement components at each joint of a rigid-jointed space frame is _____.
1	2
3	6

15. If in a rigid-jointed space frame, (6m + r) < 6j, then the frame is ____.
unstable	stable and statically determinate
stable and statically indeterminate	none of the above

16. The principle of virtual work can be applied to elastic system by considering the virtual work of _____.
internal forces only	external forces only
internal as well as external forces	none of the above

17. Castigliano's first theorem is applicable
for statically determinate structures only	when the system behaves elastically
only when principle of superposition is valid	none of the above

18. Principle of superposition is applicable when
deflections are linear functions of applied forces	material obeys Hooke's law
the action of applied forces will be affected by small deformations of the structure	none of the above

19. In moment distribution method, the sum of distribution factors of all the members meeting at any joint is always _____.
zero	less than 1
1	greater than 1

20. The carryover factor in a prismatic member whose far end is fixed is _____.
0	1/2
3/4	1