Q.1
When a body is subjected to a direct tensile stress (σx) in one plane accompanied by a simple shear stress (τxy), the maximum shear stress is
Q.2
Two bars of different materials and same size are subjected to the same tensile force. If the bars have unit elongation in the ratio of 2:5, then the ratio of modulus of elasticity of the two materials will be
Q.3
Whenever some external system of forces acts on a body, it undergoes some deformation. As the body undergoes some deformation, it sets up some resistance to the deformation. This resistance per unit area to deformation, is called
Q.4
Elasticity of Mild Steel specimen is defined by
Q.5
In a simple bending theory, one of the assumptions is that the material of the beam is isotropic. This assumption means that the
Q.6
A boiler shell 200 cm diameter and plate thickness 1.5 cm is subjected to internal pressure of 1.5 MN/m, and then the hoop stress will be
Q.7
A bar of copper and steel form a composite system, which is heated to a temperature of 40°C. The stress induced in the copper bar will be
Q.8
The relation between equivalent length (L) and actual length (l) of a column for both ends fixed is
Q.9
When a body is subjected to a direct tensile stress (σ) in one plane, then tangential or shear stress on an oblique section of the body inclined at an angle ‘θ’ to the normal of the section is
Q.10
When a body is subjected to a direct tensile stress (σ) in one plane, then normal stress on an oblique section of the body inclined at an angle 'θ' to the normal of the section is
Q.11
The maximum deflection of a fixed beam carrying a central point load lies at
Q.12
When a bar of length ‘l’ and diameter ‘d’ is rigidly fixed at the upper end and hanging freely, then the total elongation produced in the bar due to its own weight is (where w = Weight per unit volume of the bar)
Q.13
The buckling load for a given column depends upon
Q.14
A load which is spread over a beam in such a manner that it varies uniformly over the whole length of abeam is called uniformly ________ load.
Q.15
A continuous beam is one which is
Q.16
A cantilever beam is one which is
Q.17
A body is subjected to two normal stresses 20 kN/m² (tensile) and 10 kN/m² (compressive) acting perpendicular to each other. The maximum shear stress is
Q.18
When a circular bar tapering uniformly from diameter d₁, at one end to diameter d₂ at the other end, is subjected to an increase in temperature (t), then the thermal stress induced is (where α = Coefficient of linear expansion, and E = Modulus of elasticity for the bar material)
Q.19
In a beam subjected to pure bending, the intensity of stress in any fibre is _________ the distance of the fibre from the neutral axis.
Q.20
When a beam is subjected to a bending moment, the strain in a layer is __________ the distance from the neutral axis.
Q.21
When a beam is subjected to bending moment, the stress at any point is __________ the distance of the point from the neutral axis.
Q.22
The strength of the shaft is judged by the_____________.
Q.23
The buckling load for a given material depends on
Q.24
The Rankine's constant for a mild steel column with both ends hinged is
Q.25
During a tensile test on a specimen of 1 cm cross-section, maximum load observed was 8 tonnes and area of cross-section at neck was 0.5 cm². Ultimate tensile strength of specimen is
Q.26
A simply supported beam 'A' of length ‘l’, breadth ‘b’ and depth ‘d’ carries a central load ‘W’. Another beam 'B' of the same dimensions carries a central load equal to 2W. The deflection of beam 'B' will be __________ as that of beam 'A'.
Q.27
Two shafts 'A' and 'B' are made of same material. The shaft 'A' is of diameter D and shaft 'B' is of diameter D/2. The strength of shaft 'B' is _________ as that of shaft 'A'
Q.28
The springs in brakes and clutches are used to
Q.29
In a tensile test on mild steel specimen, the breaking stress as compared to ultimate tensile stress is
Q.30
The stress developed in a material at breaking point in extension is called
0 h : 0 m : 1 s