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Q.1
An isolated load W is acting at a distance a from the left hand support, of a three hinged arch of span 2l and rise h hinged at the crown, the horizontal reaction at the support, is
Wa/h
Wa/2h
2W/ha
2h/Wa
Q.2
In case of a simply supported I-section beam of span L and loaded with a central load W, the length of elasto-plastic zone of the plastic hinge, is
L/2
L/3
L/4
L/5
Q.3
A bar L metre long and having its area of cross-section A, is subjected to a gradually applied tensile load W. The strain energy stored in the bar is
WL/2AE
WL/AE
W²L/AE
W²L/2AE
Q.4
A spring of mean radius 40 mm contains 8 action coils of steel (N = 80000 N/mm²), 4 mm in diameter. The clearance between the coils being 1 mm when unloaded, the minimum compressive load to remove the clearance, is
25 N
30 N
35 N
40 N
Q.5
A material is said to be perfectly elastic if
It regains its original shape on removal of the load
It regains its original shape partially on removal of the load
It does not regain its original shape at all
None of these
Q.6
Pick up the correct statement from the following:
The moment of inertia is calculated about the axis about which bending takes place
If tensile stress is less than axial stress, the section experiences compressive stress
If tensile stress is equal to axial stress, the section experiences compressive stress
All the above
Q.7
For calculating the allowable stress of long columns σ0 = σy/n [1 - a (1/r)²]is the empirical formula, known as
Straight line formula
Parabolic formula
Perry
Rankine
Q.8
The ratio of maximum and average shear stresses on a rectangular section, is
1
1.25
1.5
2.5
Q.9
A steel bar 20 mm in diameter simply-supported at its ends over a total span of 40 cm carries a load at its centre. If the maximum stress induced in the bar is limited to N/mm², the bending strain energy stored in the bar, is
411 N mm
511 N mm
611 N mm
711 N mm
Q.10
A load of 1960 N is raised at the end of a steel wire. The minimum diameter of the wire so that stress in the wire does not exceed 100 N/mm² is:
4.0 mm
4.5 mm
5.0 mm
5.5 mm
Q.11
Gradually applied static loads do not change with time their
Magnitude
Direction
Point of application
All the above
Q.12
The yield moment of a cross section is defined as the moment that will just produce the yield stress in
The outer most fibre of the section
The inner most fibre of the section
The neutral fibre of the section
The fibre everywhere
Q.13
In plastic analysis, the shape factor for rectangular section, is
1.4
1.5
1.6
1.7
Q.14
For a strongest rectangular beam cut from a circular log, the ratio of the width and depth, is
0.303
0.404
0.505
0.707
Q.15
H V are the algebraic sums of the forces resolved horizontally and vertically respectively, M is the algebraic sum of the moments of forces about any point, for the equilibrium of the body acted upon
H = 0
V = 0
M = 0
All the above
Q.16
The ratio of the deflections of the free end of a cantilever due to an isolated load at 1/3rd and 2/3rd of the span, is
1/7
2/7
3/7
2/5
Q.17
A steel rod 1 metre long having square cross section is pulled under a tensile load of 8 tonnes. The extension in the rod was 1 mm only. If Esteel = 2 × 106 kg/cm², the side of the rod, is
1 cm
1.5 cm
2 cm
2.5 cm
Q.18
For beams of uniform strength, if depth is constant,
Width b M
Width b M
Width b 3 M
Width b 1/M
Q.19
A composite beam is composed of two equal strips one of brass and other of steel. If the temperature is raised
Steel experiences tensile force
Brass experiences compressive force
Composite beam gets subjected to a couple
All the above
Q.20
Beams composed of more than one material, rigidly connected together so as to behave as one piece, are known as
Compound beams
Indeterminate beams
Determinate beams
Composite beams
Q.21
At yield point of a test piece, the material
Obeys Hooke’s law
Behaves in an elastic manner
Regains its original shape on removal of the load
Undergoes plastic deformation
Q.22
The load on a spring per unit deflection, is called
Stiffness
Proof resilience
Proof stress
Proof load
Q.23
The locus of reaction of a two hinged semi-circular arch, is
Straight line
Parabola
Circle
Hyperbola
Q.24
The ratio of maximum shear stress to average shear stress of a circular beam, is
2/3
3/2
3/4
4/3
Q.25
P = 4π² EI/L² is the equation of Euler's crippling load if
Both the ends are fixed
Both the ends are hinged
One end is fixed and other end is free
One end is fixed and other end is hinged
Q.26
The forces in the members of simple trusses, may be analysed by
Graphical method
Method of joints
Method of sections
All the above
Q.27
The moment of inertia of a triangular section (height h, base b) about its base, is
bh²/12
b²h/12
bh³/12
b³h/12
Q.28
The ratio of crippling loads of a column having both the ends fixed to the column having both the ends hinged, is
1
2
3
4
Q.29
The equivalent length of a column of length L, having both the ends hinged, is
2L
L
L/2
L/√2
Q.30
There are two hinged semicircular arches A, B and C of radii 5 m, 7.5 m and 10 m respectively and each carries a concentrated load W at their crowns. The horizontal thrust at their supports will be in the ratio of
1 : 1½ : 2
2 : 1½ : 1
1 : 1 : 2
None of these
0 h : 0 m : 1 s
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