Machine Design In an oil lubricated journal bearing, the coefficient of friction between the journal and the bearing Becomes minimum at an optimum speed and then increases with further increase in speed Is minimum at zero speed and increases monotonically with increase in speed Remains constant at all speeds Is maximum at zero speed and decreases monotonically with increase in speed Becomes minimum at an optimum speed and then increases with further increase in speed Is minimum at zero speed and increases monotonically with increase in speed Remains constant at all speeds Is maximum at zero speed and decreases monotonically with increase in speed ANSWER DOWNLOAD EXAMIANS APP
Machine Design In a multiple V-belt drive, if one of the belts break, then Only the broken belt is replaced The broken belt need not to be replaced The broken belt and the belt on either side of it, is replaced The entire set of belts is replaced Only the broken belt is replaced The broken belt need not to be replaced The broken belt and the belt on either side of it, is replaced The entire set of belts is replaced ANSWER DOWNLOAD EXAMIANS APP
Machine Design The shear stress in a beam varies from zero at the outer fibers to a maximum at the________. Lower surface Upper surface None of these Neutral surface Lower surface Upper surface None of these Neutral surface ANSWER DOWNLOAD EXAMIANS APP
Machine Design Whether any core is required in wire ropes No Yes Rarely Sometimes No Yes Rarely Sometimes ANSWER DOWNLOAD EXAMIANS APP
Machine Design If a shaft made from ductile material is subjected to combined bending and twisting moment, calculations based on which one of the following failure theories will give the most conservative value? Maximum distortion energy theory Maximum strain energy theory Maximum principal stress theory Maximum shear stress theory Maximum distortion energy theory Maximum strain energy theory Maximum principal stress theory Maximum shear stress theory ANSWER DOWNLOAD EXAMIANS APP
Machine Design When the speed of belt increases, The coefficient of friction between the belt and pulley increases The coefficient of friction between the belt and pulley decreases The power transmitted will decrease The power transmitted will increase The coefficient of friction between the belt and pulley increases The coefficient of friction between the belt and pulley decreases The power transmitted will decrease The power transmitted will increase ANSWER DOWNLOAD EXAMIANS APP
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