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Q1. | Castigliano's first theorem is applicable |

A. | for statically determinate structures only [Wrong Answer] |

B. | when the system behaves elastically [Wrong Answer] |

C. | only when principle of superposition is valid [Correct Answer] |

D. | none of the above [Wrong Answer] |

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Explanation:-
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**Also Read Similar Questions Below :**

⇒ The number of independent displacement components at each joint of a rigid-jointed space frame is

1

2

3

6

⇒ 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

⇒ For strengthening a 50 m long and 5 m high straight compound wall built in brick work, which one of the following would be most suitable?

providing buttresses at certain intervals

providing a deeper foundation

using a richer mortar

using stronger bricks

⇒ Which of the following methods of structural analysis is a displacement method ?

moment distribution method

column analogy method

three moment equation

none of the above

⇒ For masonry work with solid bricks, consistency of mortar should be

5 to 8 cm

9 to 13 cm

14 to 18 cm

19 to 23 cm

⇒ Minimum thickness of stiffening wall for 1 to 3 storeys shall not be less than

10 cm

15 cm

20 cm

30 cm

⇒ 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

⇒ 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

⇒ The mode of failure of a very short masonry member having h/t ratio of less than 4 is by

shear

vertical tensile splitting

buckling

any of the above

⇒ For masonry built in 1:1:6 cement-lime-sand mix mortar or equivalent, the horizontal shear stress permissible on the area of a mortar bed joint is

0.15 MPa

0.125 MPa

0.1 MPa

0.075 MPa

⇒ If the horizontal cross-sectional area of a wall is 1200 cm2, then the basic stress shall be multiplied by a reduction factor equal to

0 6

0.75

0.85

0.95

⇒ The force method in structural analysis always ensures

Equilibrium

Kinematically admissible t'orces

Equilibrium of forces

None of the above

⇒ In column analogy method, the area of an analogous column for a fixed beam of span L and flexural rigidity El is taken as

L/EI

L/2EI

L/3EI

L/4EI

⇒ For a single point load W moving on a symmetrical three hinged parabolic arch of span L, the maximum sagging moment occurs at a distance x from ends. The value of x is

0.211 L

0.25 L

0.234 L

0.5 L

⇒ The Castigliano's second theorem can be used to compute deflections

in statically determinate structures only

for any type of structure

at the point under the load only

for beams and frames only

⇒ A simply supported beam deflects by 5 mm when it is subjected to a concentrated load of 10 kN at its centre. What will be deflection in a 1/10 model of the beam if the model is subjected to a 1 kN load at its centre ?

5 mm

0.5 mm

0.05 mm

0.005mm

⇒ Degree of static indeterminacy of a rigid-jointed plane frame having 15 members, 3 reaction components and 14 joints is

2

3

6

8

⇒ 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

⇒ The method of virtual work in the analysis of structures results is

Compatible deformations

Equilibrium of forces

Stress strain relations

None of these

⇒ The truss can be analysed by the methods of joints when the number of unknown at a joint is equal to

1

2

3

4

⇒ The method of moment distribution in structural analysis is

An iterative method

An exact method

An approximate method

None of these

⇒ Which of the following will give higher ratio of brickwork strength to mortar strength ?

1 : % : 3

1 : Vz: 4>/2

1:1:6

1:2:9

⇒ The three moments equation is applicable only when

the beam is prismatic

there is no settlement of supports

there is no discontinuity such as hinges within the span

the spans are equal

⇒ Degree of kinematic indeterminacy of a pin-jointed plane frame is given by

2j - r

j - 2r

3j - r

2j + r

⇒ The carryover factor in a prismatic member whose far end is fixed is

0

1/2

3/4

1

⇒ A free standing brick wall 20 cm thick is subjected to a wind pressure of 75kg/m2. The maximum height of wall from stability consideration is

0.64 m

0.96 m

1.28 m

1.5 m

⇒ The deformation of a spring produced by a unit load is called

stiffness

flexibility

influence coefficient

unit strain

⇒ 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

change from compression to tension

change from tension to compression

always be compression

always be tension

⇒ The moment area theorems in the structural analysis fall in the category of

Force method

Displacement method

Stiffness method

Iterative method

⇒ Effects of shear force and axial force on plastic moment capacity of a structure are respectively to

increase and decrease

increase and increase

decrease and increase

decrease and decrease