Deck 1: Structural Analysis Principles and Methods

Question 1

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

Answer 1

deflections are linear functions of applied forces

Question 2

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

Answer 2

for any type of structure

Question 3

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

Answer 3

change from compression to tension

Question 4

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

Question 5

Which of the following is not the displacement method?

A)equilibrium method
B)column analogy method
C)moment distribution method
D)kani\s method

Question 6

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

Question 7

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

Question 8

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

Question 9

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

Question 10

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

Question 11

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

Question 12

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

Question 13

For a symmetrical two hinged parabolic arch, if one of the supports settles horizontally, then the horizontal thrust

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

Question 14

A load 'W T maximum bending moment at 0.4 1 from the left support is

A)0.16 wl
B)0.20 wl
C)0.24 wl
D)0.25 wl

Question 15

In the displacement method of structural analysis, the basic unknowns are

A)displacements
B)force
C)displacements and forces
D)none of the above

Question 16

In moment distribution method, the sum of distribution factors of all the members meeting at any joint is always

A)zero
B)less than 1
C)1
D)greater than 1

Question 17

The width of the analogous column in the method of column analogy is

A)2/ei
B)1/ei
C)1/2 ei
D)1/4 ei

Question 18

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

A)2j - r
B)j - 2r
C)3j - r
D)2j + r

Question 19

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

A)1
B)2
C)3
D)6

Question 20

While using three moments equation, a fixed end of a continuous beam is replaced by an additional span of

A)zero length
B)infinite length
C)zero moment of inertia
D)none of the above

Question 21

Select the correct statement

A)flexibility matrix is a square symmetrical matrix
B)stiffness matrix is a square symmetrical matrix
C)both (a) and (b)
D)none of the above

Question 22

Bending moment at any section in a conjugate beam gives in the actual beam

A)slope
B)curvature
C)deflection
D)bending moment

Question 23

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

A)1
B)2
C)3
D)6