Structural Analysis Quiz # 1

In bars with large initial curvature the working stress is _________ the limit of proportionality.

above

below

equal to

The strain energy stored in a trussed beam is due to .... .

bending

direct force

both bending and direct force

indirect force

bending and indirect force

If E is the modulus of elasticity and I is the moment of inertia then, the width of the column in the column analogy method is equal to:

EI

1 / EI

E + I

1 / E + I

In a simple chain links what is the value of the pull in a straight position?

P / 2

(P / 2)cosѲ

(P / 2)sinѲ

2P

Calculate the horizontal tension in the cable whose load per meter run is 1 kilo newtons per meter. The span of the cable is 100 meters and it has a central dip of 10 meters.

100 kilo newtons

115 kilo newtons

125 kilo newtons

135 kilo newtons

If the span of a bridge is ___, then it is used in the construction of highways.

less than 50 meters

100 meters

150 meters

more than 200 meters

Calculate the minimum number of members required to build a stable truss, given that the number of joints required is 10.

20

24

28

32

Which of the following types of support has zero degree of freedom?

Built-in support

Hinged support

Roller support

The ratio of the total strain energy to redundant reaction is equal to:

0

1

-1

2

In the equation of the final stress N/A + M/AR[(1 + 1/M) x (y/r + y)], the normal force "N" is positive if it produces ________________.

Hoop stress

Compressive stress

Shear stress

Tensile stress

The value of the bending stress at the neutral axis is ______

1

0

-1

∞

The value of the plane stress of a thin plate which is uniformly loaded by forces is _________.

1

0

∞

2

Calculate the degree of external redundancy for a structure whose total number of reaction components are 90 and the total number of available conditions is 50.

2.8

140

9/5

40

Calculate the total indeterminateness for the above given diagram, given that the total number of reaction components is 4, degree of external indeterminacy is 1 and the degree of internal redundancy is 0.

0

1

12

21

If the distance of the neutral axis from the centroidal layer is negative, it means that:

the neutral axis is away from the centre of curvature.

the neutral axis is towards the centre of curvature

the neutral axis is perpendicular to the center of the curvature.

The bending moment of an arch is equal to:

half of the vertical intercept between the linear arch and the center line of actual arch.

twice the vertical intercept between the linear arch and the center line of actual arch.

one third of the vertical intercept between the linear arch and the center line of actual arch.

the vertical intercept between the linear arch and the center line of actual arch.

In a semi-circular arch, the load applied at the center is 1000 newtons. Calculate the reaction component.

31.8

318

3.18

.318

Due to the ____________ in temperature, the length of the 3-hinged arch ___________.

increase, decreases

increase, increases

decrease, increases

decrease, decreases

Which among the following do/does not come under the category of the compatibility method?

Castigliano's theorem of minimum strain energy

Maxwell-Mohr equations

Slope deflection method

Moment distribution method

a and b

c and d

If λ is the small strain or displacement, ∂U is the total strain energy and ∂T is the elastic limit then, which among the following is the correct expression for the self straining systems?

∂U + ∂T = λ

∂U X ∂T = λ

∂U - ∂T = λ

∂U / ∂T = λ

In a continuous beam, the sum of the moments acting at a joint is equal to ___________.

1

2

-1

3

0

In unsymmetrical bending:

the plane of bending is parallel to a plane and lies in the same plane.

the plane of bending is perpendicular to a plane and lies in the same plane.

the plane of bending does not lie in the same plane.

If the value of the degree of internal indeterminacy of a structural frame is 54, calculate the number of areas which are completely enclosed by members of the frame.

17

18

19

20

In the theory of bending, the external force is distributed _________ on the external force.

horizontally

parabolically

vertically

tangentially

If the value of the equivalent uniformly distributed load is 10 newtons per meter and is distributed along a span of 10 meters, calculate the point load.

30 newtons

45 newtons

48 newtons

50 newtons

A simply supported beam has a maximum bending moment of 100 newtons per meter at the center of a 10 meter span. Calculate the uniformly distributed load across the beam.

8 newtons per meter

10 newtons per meter

12 newtons per meter

14 newtons per meter

Which of the following is not a characteristic of the cantilever method?

Point of contra flexure in each member does not lie at mid-span.

Point of contra flexure in each member does not lie at mid-height.

Axial stress in the column is inversely proportional to their distance from the centroidal vertical axis.

Axial stress in the column is directly proportional to their distance from the centroidal vertical axis.

The anchor cables transfer the .... of suspension cable to the anchorage.

torque

thrust

tension

twist

In the Grashof's theory for symmetrically loaded circular plates, the thickness is .... .

smaller than the diameter of the circular plate.

larger than the diameter of the circular plate.

equal to the diameter of the circular plate.

The Airy stress function is denoted by:

Ѳ

σ

έ

φ