Machine Design 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) Gd⁴/ 8D3n Gd⁴/ 8D²n Gd⁴/ 4D3n Gd3/ 8D3n Gd⁴/ 8D3n Gd⁴/ 8D²n Gd⁴/ 4D3n Gd3/ 8D3n ANSWER DOWNLOAD EXAMIANS APP
Machine Design In the case of an elastic bar fixed at upper end and loaded by a falling weight at lower end, the shock load produced can be decreased by Would depend upon other factors Increasing the cross-section area of bar Decreasing the cross-section area of bar Remain unaffected with cross-section area Would depend upon other factors Increasing the cross-section area of bar Decreasing the cross-section area of bar Remain unaffected with cross-section area ANSWER DOWNLOAD EXAMIANS APP
Machine Design The maximum bending stress in a curved beam having symmetrical section always occur at the Centroidal axis Neutral axis Inside fiber Outside fiber Centroidal axis Neutral axis Inside fiber Outside fiber ANSWER DOWNLOAD EXAMIANS APP
Machine Design Tensile strength of a mild steel specimen can be roughly predicted from following hardness test Rockwell Brinell None of these Vickers Rockwell Brinell None of these Vickers ANSWER DOWNLOAD EXAMIANS APP
Machine Design The efficiency of a square threaded screw is maximum if the helix angle is equal to(Where φ = Angle of friction) 45° + φ/2 45° - φ/2 45° - φ 90° - φ 45° + φ/2 45° - φ/2 45° - φ 90° - φ ANSWER DOWNLOAD EXAMIANS APP
Machine Design The ratio of endurance limit in shear to the endurance limit in flexure is 0.33 0.4 0.55 0.5 0.33 0.4 0.55 0.5 ANSWER DOWNLOAD EXAMIANS APP
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