The plane figure shown below is (a) stable and statically determinate (b) unstab

Question

The plane figure shown below is (a) stable and statically determinate (b) unstable and statically determinate (c) stable and statically indeterminate (d) unstable and statically indeterminate The degree of static indeterminacy of the rigid frame having two internal hinges as shown in the figure below, is (a) 8 (b) 7 (c) 6 (d) 5 The degree of static indeterminacy of a rigidly jointed frame in a horizontal plane and subjected to vertical load only, as shown in figure below, is (a)6 (b) 4 (c) 3 (d) 1 A planar truss tower structure is shown in the figure: Consider the following statements about the external and internal determinacies of the truss. P. Externally Determinate Q. External static Indeterminacy = 1 R. External Static Indeterminacy = 2 S. Internally Determinate T. Internal Static Indeterminacy = 1 U. Internal Static Indeterminacy = 2 Which one of the following options is correct? (a) P-False: Q- True: R-False: S-False: T- False: U-True (b) P-False: Q- True: R-False: S-False: T- True: U-False (c) P-False: Q- False: R-True: S-False: T- False: U-True (d) P-True: Q- True: R-False: S-True: T- False: U-True

Explanation / Answer

7)Answer is option a) stable and staticlly determinate. This is because for a system to be stable the degree of static indeterminacy should be negative. But for the structure shown the degree of static indeterminacy is 0. Non negative number means the structure is stable. Also, 0 means the structure is statically determinate

8)The answer is option (d)5 . this is because there are 8 unknowns and three equilibrium equations

9)The answer is option (c)3 . This is because there are 6 unknowns and three equilibrium equations

10)The answer is option (a). The truss has external indeterminacy of 1 and internal indeterminacy of 2. This is because to make the structure determinate, we need to make one support roller and remove two members

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