Stress may be expressed in Newtons
-
per millimetre square (N/mm2) -
per centimetre square (N/cm2) -
per metre square (N/m2) -
All of the above.
A load ofN is raised at the end of a steel wire. The minimum diameter of the wire so that stress in the wire does not exceedN/mm2 is :
-
4.0 mm -
4.5 mm -
5.0 mm -
5.5 mm -
6.0 mm
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.
Pick up the correct statement from the following:
-
The bending moment which when acting alone would produce the maximum stress equal to the major principal stress caused by combined bending and torsion, is called equivalent bending moment -
Mcg = (M M2 + r2) where letters carry their usual meanings -
Tcp = m2 + T2 where letters carry their usual meanings -
The torque which when acting alone would produce maximum shear stress equal to the maximum shear stress caused by the combined bending and torsion, is called equivalent torque -
All the above.
Principal planes are subjected to
-
normal stresses only -
tangential stresses only -
normal stresses as well as tangential stresses -
none of these.
If ΣH and ΣV are the algebraic sums of the forces resolved horizontally and vertically respectively, and ΣM is the algebraic sum of the moments of forces about any point, for the equilibrium of the body acted upon
-
ΣH = 0 -
ΣV = 0 -
ΣM = 0 -
all the above.
In plastic analysis, the shape factor for a circular section, is
-
1.5 -
1.6 -
1.7 -
1.75
A rolled steel joist is simply supported at its ends and carries a uniformly distributed load which causes a maximum deflection ofmm and slope at the ends of 0.radian. The length of the joist will be,
-
10 m -
12 m -
14 m -
16 m -
18 m
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.
For determining the support reactions at A and B of a three hinged arch, points B and C are joined and produced to intersect the load line at D and a line parallel to the load line through A at D'. Distances AD, DD' and AD' when measured were 4 cm, 3 cm and 5 cm respectively. The angle between the reactions at A and B is
-
30° -
45° -
60° -
90°
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 x 106 kg/cm2, the side of the rod, is
-
1 cm -
1.5 cm -
2 cm -
2.5 cm
Pick up the correct statement from the following:
-
In a loaded beam, the moment at which the first yield occurs is called yield moment -
In a loaded beam, the moment at which the entire section of the beam becomes fully plastic, is called plastic moment -
In a fully plastic stage of the beam, the neutral axis divides the section in two sections of equal area -
The ratio of plastic moment to the yield moment, is called shape factor -
All the above.
Pick up the incorrect statement from the following : The torsional resistance of a shaft is directly proportional to
-
modulus of rigidity -
angle of twist -
reciprocal of the length of the shaft -
moment of inertia of the shaft section.
A truss containing j joints and m members, will be a simple truss if
-
m = 2j - 3 -
j = 2m - 3 -
m = 3j - 2 -
j = 3m - 2
In plastic analysis, the shape factor for a triangular section, is
-
1.5 -
1.34 -
2.34 -
2.5
In plastic analysis, the shape factor for rectangular section, is
-
1.4 -
1.5 -
1.6 -
1.7
The maximum deflection due to a uniformly distributed load w/unit length over entire span of a cantilever of length l and of flexural rigidly EI, is
Pick up the correct statement from the following:
-
The point of intersection of the bending axis with the cross section of the beam, is called shear centre -
For I sections, the shear centre coincides with the centroid of the cross section of the beam -
For channels, the shear centre does not concide its centroid -
Bending loads should pass through the shear centre to avoid twisting -
All the above.
The stiffness of the close coil helical spring is
Pick up the correct statement from the following:
-
The point of intersection of the bending axis with the cross section of the beam, is called shear centre -
For I sections, the shear centre coincides with the centroid of the cross section of the beam -
For channels, the shear centre does not concide its centroid -
Bending loads should pass through the shear centre to avoid twisting -
All the above.
In plastic analysis, the shape factor for rectangular section, is
-
1.4 -
1.5 -
1.6 -
1.7
The maximum deflection due to a uniformly distributed load w/unit length over entire span of a cantilever of length l and of flexural rigidly EI, is
The maximum magnitude of shear stress due to shear force F on a rectangular section of area A at the neutral axis, is
The stiffness of the close coil helical spring is
Pick up the correct statement from the following:
-
The point of intersection of the bending axis with the cross section of the beam, is called shear centre -
For I sections, the shear centre coincides with the centroid of the cross section of the beam -
For channels, the shear centre does not concide its centroid -
Bending loads should pass through the shear centre to avoid twisting -
All the above.
In plastic analysis, the shape factor for rectangular section, is
-
1.4 -
1.5 -
1.6 -
1.7