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 90° - φ 45° - φ 45° + φ/2 45° - φ/2 90° - φ 45° - φ 45° + φ/2 ANSWER DOWNLOAD EXAMIANS APP
Machine Design The fatigue stress concentration factor is defined as The ratio of endurance limit with stress concentration to the endurance limit without stress concentration The ratio of endurance limit without stress concentration to the endurance limit with stress concentration The product of the endurance limits with and without stress concentration All of these The ratio of endurance limit with stress concentration to the endurance limit without stress concentration The ratio of endurance limit without stress concentration to the endurance limit with stress concentration The product of the endurance limits with and without stress concentration All of these ANSWER DOWNLOAD EXAMIANS APP
Machine Design A screw is said to be over hauling screw, if the Friction angle is more than helix angle Friction angle is less than helix angle Efficiency of screw is 100% Friction angle is equal to helix angle Friction angle is more than helix angle Friction angle is less than helix angle Efficiency of screw is 100% Friction angle is equal to helix angle ANSWER DOWNLOAD EXAMIANS APP
Machine Design A sliding bearing which can support steady loads without any relative motion between the journal and the bearing, is called Boundary lubricated bearing Hydrodynamic lubricated bearing Zero film bearing Hydrostatic lubricated bearing Boundary lubricated bearing Hydrodynamic lubricated bearing Zero film bearing Hydrostatic lubricated bearing ANSWER DOWNLOAD EXAMIANS APP
Machine Design The condition for maximum power transmission is that the maximum tension in the flat belt should be equal to (Where, Pc = tension in belt due to centrifugal force) 1 Pc 3 Pc Pc/3 2 Pc 1 Pc 3 Pc Pc/3 2 Pc ANSWER DOWNLOAD EXAMIANS APP
Machine Design For maximum power, the velocity of the belt will be None of these √(T/3m) √(T/2m) √(T/m) None of these √(T/3m) √(T/2m) √(T/m) ANSWER DOWNLOAD EXAMIANS APP
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