# Practice Test: Question Set - 01

**1. If in a pin-jointed plane frame (m + r) > 2j, then the frame is**

**(Where ‘m’ is number of members, ‘r’ is reaction components and ‘j’ is number of joints)**

- (A) Stable and statically determinate

- (B) Stable and statically indeterminate

- (C) Unstable

- (D) None of the above

**2. Principle of superposition is applicable when**

- (A) Deflections are linear functions of applied forces

- (B) Material obeys Hooke's law

- (C) The action of applied forces will be affected by
small deformations of the structure

- (D) None of the above

**3. The Castigliano's second theorem can be used to compute deflections**

- (A) In statically determinate structures only

- (B) For any type of structure

- (C) At the point under the load only

- (D) For beams and frames only

**4. When a uniformly distributed load, longer than the span of the girder, moves from left to right, then the maximum bending moment at mid section of span occurs when the uniformly distributed load occupies**

- (A) Less than the left half span

- (B) Whole of left half span

- (C) More than the left half span

- (D) Whole span

**5. For stable structures, one of the important properties of flexibility and stiffness matrices is that the elements on the main diagonal**

(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)

**6. When a load crosses a through type Pratt truss in the direction left to right, the nature of force in any diagonal member in the left half of the span would**

- (A) Change from compression to tension

- (B) Change from tension to compression

- (C) Always be compression

- (D) Always be tension

**7. Which of the following methods of structural analysis is a force method?**

- (A) Slope deflection method

- (B) Column analogy method

- (C) Moment distribution method

- (D) None of the above

**8. Which of the following is not the displacement method?**

- (A) Equilibrium method

- (B) Column analogy method

- (C) Moment distribution method

- (D) Kani's method

**9. For a two-hinged arch, if one of the supports settles down vertically, then the horizontal thrust**

- (A) Is increased

- (B) Is decreased

- (C) Remains unchanged

- (D) Becomes zero

**10. The deflection at any point of a perfect frame can be obtained by applying a unit load at the joint in**

- (A) Vertical direction

- (B) Horizontal direction

- (C) Inclined direction

- (D) The direction in which the deflection is required

**11. The principle of virtual work can be applied to elastic system by considering the virtual work of**

- (A) Internal forces only

- (B) External forces only

- (C) Internal as well as external forces

- (D) None of the above

**12. If in a rigid-jointed space frame, (6m + r) < 6j, then the frame is**

- (A) Unstable

- (B) Stable and statically determinate

- (C) Stable and statically indeterminate

- (D) None of the above

**13. The three moments equation is applicable only when**

- (A) The beam is prismatic

- (B) There is no settlement of supports

- (C) There is no discontinuity such as hinges within the
span

- (D) The spans are equal

**14. Which of the following methods of structural analysis is a displacement method?**

- (A) Moment distribution method

- (B) Column analogy method

- (C) Three moment equation

- (D) None of the above

**15. The fixed support in a real beam becomes in the conjugate beam a**

- (A) Roller support

- (B) Hinged support

- (C) Fixed support

- (D) Free end

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