Q. While testing a cast iron beam (2.5 cm x 2.5 cm) in section and a metre long simply supported at the ends failed when a 100 kg weight is applied at the centre. The maximum stress induced is :

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Q. The tensile force required to cause an elongation of 0.045 mm in a steel rod of 1000 mm length and 12 mm diameter, is (where E = 2 x 10⁶ kg/cm²)

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Q. According to Unwin's formula, the diameter d of a rivet of plate of thickness t is :

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Q. In a bar of large length when held vertically and subjected to a load at its lower end, its own-weight produces additional stress. The maximum stress will be

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Q. If a shaft is simultaneously subjected to a toque T and a bending moment M, the ratio of maximum bending stress and maximum shearing stress is

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Q. Struts are load carrying members of a frame structure which are subjected to

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Q. A simply supported wooden beam 150 cm long and having a cross section 16 cm x 24 cm carries a concentrated load, at the centre. If the permissible stress ft = 75 kg/cm² and fs = 10 kg/cm² the safe load is

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Q. A solid cube is subjected to equal normal forces on all its faces. The volumetric strain will be x-times the linear strain in any of the three axes when

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Q. When equal and opposite forces applied to a body, tend to elongate it, the stress so produced, is called

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Q. Stress in a beam due to simple bending, is

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Q. A cantilever carrying a uniformly distributed load W over its full length is propped at its free end such that it is at the level of the fixed end. The bending moment will be zero at its free end also at

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Q. In rectangular columns (cross-section b x h), the core is a

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Q. A simply supported beam of span L carries a uniformly distributed load W. The maximum bending moment M is

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Q. A cantilever beam rectangular in cross-section is subjected to an isolated load at its free end. If the width of the beam is doubled, the deflection of the free end will be changed in the ratio of

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Q. The phenomenon of slow extension of materials having constant load, i.e. increasing with the time is called

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Q. n and j are numbers of members and joints in a frame. It contains redundant members if

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Q. The materials which have the same elastic properties in all directions, are called

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Q. In a three hinged arch, the third hinge is generally kept at

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Q. A bending moment may be defined as :

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Q. The length of a column, having a uniform circular cross-section of 7.5 cm diameter and whose ends are hinged, is 5 m. If the value of E for the material is 2100 tonnes/cm², the permissible maximum crippling load will be

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