A beam of span 3 m and width 90 mm is loaded as shown in figure. If the allowable bending stress is 12 MPa, the minimum depth required for the beam will be
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Match the Column –I with Column – II and select the correct answer:
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Euler’s formula gives 5 to 10% error in crippling load as compared to experimental results in practice because
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On the case of beams with circular cross section, what is the ratio of the maximum shear stress to average shear stress?
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A cantilever beam of length ‘l’ length at the tip with force F, the root bending moment is
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If the area of cross-section of a wire is circular and if the radius of this circle decreases to half its original value die to the stretch of the wire by a load, then the modulus of elasticity of the wire be
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A T-Section beam is simply supported and subjected to a uniform distributed load over its whole span. Maximum longitudinal stress in the beam occurs at
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In the case of bi-axial state of normal stresses, the normal stress on 45° plane is equal to
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A circular shaft subjected to twisting moment results in maximum shear stress of 60 MPa. Then the maximum compressive stress in the material is
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For the centrally supported uniform beam as shown the values F1 and F2, when the beam is in equilibrium, are respectively
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Choose the wrong statement
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A mild steel specimen is tested under tension and a continuous graph between load and extension is obtained. A load at which there is considerable extension without increase in resistance is called
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State of stress in plane element is shown in figure. Which one of the correct sketch of Mohr’s circle of the state of stress?
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Shear stress distribution for a rectangular beam subjected to transverse loading is
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Consider the following statements in case of beams: Which of the following statement is NOT correct?
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Measured mechanical properties of material are same in a particular direction at each point. This property of the material is known as
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Auto fretage is the method of
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In a close coiled helical spring, the spring index is given by D/d where D and d are the mean coil diameter and wire diameter respectively. For considering the effect of curvature, the Wahl’s stress factor K is given by
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A cantilever beam of rectangular cross-section is subjected to a load W at its free end. If the depth of the beam is doubled and the load is halved, the deflection of the free end as compared to original deflection will be