THEORY OF STRUCTURES QUIZ

In case of principal axes of a section

None of these

Sum of moment of inertia is zero

Difference of moment inertia is zero

Product of moment of inertia is zero

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A compound truss may be formed by connecting two simple rigid frames, by

Three bars intersecting at a point

Two bars

Three bars

three parallel bars

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Maximum shear stress theory for the failure of a material at the elastic limit, is known

Haig's theory

Guest's or Trecas' theory

St. Venant's theory

Rankine's theory

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A material is said to be perfectly elastic if

It regains its original shape partially on removal of the load

None of these

It regains its original shape on removal of the load

It does not regain its original shape at all

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The vertical reaction for the arch is

wa/l

wa²/2l

wl/a

wa/2l

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Beams composed of more than one material, rigidly connected together so as to behave as one piece, are known as

Indeterminate beams

Determinate beams

Compound beams

Composite beams

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A shaft rotating N.R.M. under a torque T, transmits a power

/60 Newton metres/sec

/30 Newton metres/sec

/30 Newton metres/min

/60 Newton metres/min

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Inertia of a rectangular section of width and depth about an axis passing the moment of through C.G. and parallel to its width is

BD³/12

BD³/6

B²D/6

BD²/6

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The ratio of circumferential stress to the longitudinal stress in the walls of a cylindrical shell, due to flowing liquid, is

1½

2

½

1

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Stress may be expressed in Newtons

Per metre square (N/m2)

None of these

Per millimetre square (N/mm²)

Per centimetre square (N/cm²)

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