Machine Design Screws used for power transmission should have High efficiency Low efficiency Strong teeth Very fine threads High efficiency Low efficiency Strong teeth Very fine threads ANSWER DOWNLOAD EXAMIANS APP
Machine Design In a hydrodynamic lubricated bearing There is a thin film of lubricant between the journal and the bearing The lubricant is forced between the journal and the bearing, by external pressure There is a thick film of lubricant between the journal and the bearing There is no lubricant between the journal and the bearing There is a thin film of lubricant between the journal and the bearing The lubricant is forced between the journal and the bearing, by external pressure There is a thick film of lubricant between the journal and the bearing There is no lubricant between the journal and the bearing ANSWER DOWNLOAD EXAMIANS APP
Machine Design The usual proportion for the width of key is (where d = Diameter of shaft or diameter of hole in the hub) d/2 d/4 d/6 d/8 d/2 d/4 d/6 d/8 ANSWER DOWNLOAD EXAMIANS APP
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 Gd3/ 8D3n Gd⁴/ 8D²n Gd⁴/ 4D3n Gd⁴/ 8D3n Gd3/ 8D3n Gd⁴/ 8D²n Gd⁴/ 4D3n ANSWER DOWNLOAD EXAMIANS APP
Machine Design Stress concentration in cyclic loading is more serious in Depends on other factors Brittle materials Equally serious in both cases Ductile materials Depends on other factors Brittle materials Equally serious in both cases Ductile materials ANSWER DOWNLOAD EXAMIANS APP
Machine Design The anti-friction bearings Can carry both radial and thrust loads Have high initial cost All of these Have low starting and low running friction at moderate speeds Can carry both radial and thrust loads Have high initial cost All of these Have low starting and low running friction at moderate speeds ANSWER DOWNLOAD EXAMIANS APP
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