Machine Design The load cup of a screw jack is made separate from the head of the spindle to Reduce the effort needed for lifting the working load Reduce the value of frictional torque Prevent the rotation of load being lifted Enhance the load carrying capacity of the jack Reduce the effort needed for lifting the working load Reduce the value of frictional torque Prevent the rotation of load being lifted Enhance the load carrying capacity of the jack ANSWER DOWNLOAD EXAMIANS APP
Machine Design The connecting rod bolts are tightened up with initial tension greater than the external load so that Bolts are weakest elements The resultant load on the bolt would not be affected by the external cyclic load Joint may not open up Bolts will not loosen during service Bolts are weakest elements The resultant load on the bolt would not be affected by the external cyclic load Joint may not open up Bolts will not loosen during service ANSWER DOWNLOAD EXAMIANS APP
Machine Design 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) p = D sin (90°/T) p = D sin (180°/T) p = D sin (120°/T) p = D sin (360°/T) p = D sin (90°/T) p = D sin (180°/T) p = D sin (120°/T) p = D sin (360°/T) ANSWER DOWNLOAD EXAMIANS APP
Machine Design The acme threads are usually found on Feed mechanism of machine tools Spindles of bench vices Railway carriage couplings Screw cutting lathes Feed mechanism of machine tools Spindles of bench vices Railway carriage couplings Screw cutting lathes 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 Hydrodynamic lubricated bearing Boundary lubricated bearing Zero film bearing Hydrostatic lubricated bearing Hydrodynamic lubricated bearing Boundary lubricated bearing Zero film bearing Hydrostatic lubricated bearing ANSWER DOWNLOAD EXAMIANS APP
Machine Design The rolling contact bearings as compared to sliding contact bearings have Low starting and low running friction except at very high speeds Accuracy of shaft alignment All of these Small overall dimensions Low starting and low running friction except at very high speeds Accuracy of shaft alignment All of these Small overall dimensions ANSWER DOWNLOAD EXAMIANS APP
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