Machine Design In an oil lubricated journal bearing, the coefficient of friction between the journal and the bearing 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 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 ANSWER DOWNLOAD EXAMIANS APP
Machine Design If p = bearing pressure on projected bearing area, z = absolute viscosity of lubricant, and N = speed of journal, then the bearing characteristic number is given by N/Zp Z/pN p/ZN ZN/p N/Zp Z/pN p/ZN ZN/p ANSWER DOWNLOAD EXAMIANS APP
Machine Design Two helical springs of the same material and of equal circular cross-section, length and number of turns, but having radii 80 mm and 40 mm, kept concentrically (smaller radius spring within the larger radius spring), are compressed between two parallel planes with a load W. The inner spring will carry a load equal to W/9 8W/9 2W/3 W/2 W/9 8W/9 2W/3 W/2 ANSWER DOWNLOAD EXAMIANS APP
Machine Design In helical gears, the distance parallel to the axis, between similar faces of adjacent teeth, is called Diametral pitch Axial pitch Normal pitch Module Diametral pitch Axial pitch Normal pitch Module ANSWER DOWNLOAD EXAMIANS APP
Machine Design The smallest diameter of an external or internal screw thread is known as Minor diameter None of these Pitch diameter Major diameter Minor diameter None of these Pitch diameter Major diameter ANSWER DOWNLOAD EXAMIANS APP
Machine Design When the screw in a mechanical screw jack rotates, the load kept on the top of it moves Axially upwards or downwards Axially upwards Axially downwards None of these Axially upwards or downwards Axially upwards Axially downwards None of these ANSWER DOWNLOAD EXAMIANS APP
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