Lewis form factor for composite and full depth involute system is (where T = Number of teeth)
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The speed of the sprocket reduces as the chain pitch __________ for a given number of teeth.
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A shaft is subjected to a maximum bending stress of 80 N/mm2 and maximum shearing stress equal to 30 N/mm2 at a particular section. If the yield point in tension of the material is 280 N/mm2 and the maximum shear stress theory of failure is used, then the factor of safety obtained will be
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The stiffness of a closely coiled helical spring subjected to an axial load W is equal to (where G = Modulus of rigidity and n = Number of active coils)
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For longitudinal joint in boilers, the type of joint used is
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For circumferential joint in boilers, the type of joint used is
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A column of length is fixed at both ends. The equivalent length of the column is
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The cracks in helical springs used in railway carriages usually start on the inner side of the coil because of the fact that
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Soderberg relation is based on __________ of the material whereas all other failure relation for dynamic loading are based on ultimate strength of the material.
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When a closely coiled helical spring is subjected to a couple about its axis, the stress induced in the wire material of the spring is
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Two shafts of the same length and material are joined in series. If the ratio of their diameters is 2, then the ratio of their angles of twist will be
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In oilness bearings
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The relation between the pitch of the chain (p) and pitch circle diameter of the sprocket (D) is given by (where T = Number of teeth on the sprocket)
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In standard taper roller bearings, the angle of taper of outer raceway is
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In case of pressure vessels having open ends, the fluid pressure induces
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In case of pressure vessels having closed ends, the fluid pressure induces
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A saddle key __________ power through frictional resistance only.
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The endurance limit of a material with finished surface in comparison to rough surface is
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A locking device in which the bottom cylindrical portion is recessed to receive the tip of the locking set screw, is called
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A screw will be self locking, if
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