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The force in EC of the truss shown in the given figure, is
5t tension
5t compression
Zero
4t tension
None of these.
The tangential component of stress on an plane inclined θ° to the direction of the force, may be obtained by multiplying the normal stress by
sin θ cos θ
sin θ
sin²θ
cos θ
tan θ
In the truss shown in given figure the force in member DC is
100 t compressive
indeterminate
Zero
100 t tensile
The general expression for the
B.M. of a beam of length l is the beam carries
an isolated load at mid span
a load varying linearly from zero at one end to w at the other end
None of these.
a uniformly distributed load w/unit length
Maximum shear stress theory for the failure of a material at the elastic limit, is known
Von Mises's theory.
Guest's or Trecas' theory
Rankine's theory
Haig's theory
St. Venant's theory
Beams composed of more than one material, rigidly connected together so as to behave as one piece, are known as
Composite beams.
Compound beams
Determinate beams
Indeterminate beams
Slenderness ratio of a long column, is
length of column divided by least radius of gyration.
area of cross-section divided by least radius of gyration
area of cross-section divided by radius of gyration
radius of gyration divided by area of cross-section
If a solid shaft
(diameter 20 cm, length 400 cm, N = 0.8 x 105 N/mm2) when subjected to a twisting moment, produces maximum shear stress of 50 N/mm2, the angle of twist in radians, is
0.001
0.002
0.003
0.0025
0.005
A shaft rotating N.R.M. under a torque T, transmits a power
Newton metres/sec
Newton metres/min
The forces in the members of simple trusses, may be analysed by
method of joints
method of sections
All the above.
graphical method
The horizontal thrust on the ends of a two hinged semicircular arch of radius R carrying
a uniformly distributed load ω per unit run over its right half span, is
All the above.
a uniformly distributed load ω per unit run over its entire span is
The S.F. diagram of a loaded beam shown in the given figure is that of
a simply supported beam with isolated central load
a cantilever with an isolated load at the free end
a cantilever with a uniformly distributed load.
a simply supported beam with uniformly distributed load
To determine the force in BD of the truss shown in the given figure a section is passed through BD, CD and CE, and the moments are taken about
C joint
A joint
B joint
D joint.
A truss containing j joints and m members, will be a simple truss if
j = 2m - 3
j = 3m - 2
m = 2j - 3
m = 3j - 2
A spring of mean radius 40 mm contains 8 action coils of steel (N = 80000 N/mm2), 4 mm indiameter.
The clearance between the coils being 1 mm when unloaded, the minimum compressive load to remove the clearance, is
30 N
40 N
35 N
25 N
A composite beam is composed of two equal strips one of brass and other ofsteel.
If the temperature is raised
composite beam bends
steel experiences tensile force
All the above.
brass experiences compressive force
composite beam gets subjected to a couple
A steel bar 20 mm in diameter simply-supported at its ends over a total span of 40 cm carries a load at itscentre.
If the maximum stress induced in the bar is limited to N/mm2, the bending strain energy stored in the bar, is
711 N mm
511 N mm
411 N mm
611 Nmm
A body is said to be in equilibrium if
it rotates about its C.G.
it moves vertically
None of these.
it moves horizontally
Flat spiral springs
are supported at outer end
All the above.
consist of uniform thin strips
are used in clock-work mechanism
are wound by applying a torque
is the equation for Euler's crippling load if
both the ends are fixed
one end is fixed and other end is hinged.
one end is fixed and other end is free
both the ends are hinged
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