Machine Design Which of the following statement is correct regarding power screws? The efficiency of a self locking screw can not be more than 50% The efficiency of Acme (trapezoidal) thread is less than that of a square thread Both (A) and (B) If the friction angle is less than the helix angle of the screw, then the efficiency will be more than 50% The efficiency of a self locking screw can not be more than 50% The efficiency of Acme (trapezoidal) thread is less than that of a square thread Both (A) and (B) If the friction angle is less than the helix angle of the screw, then the efficiency will be more than 50% ANSWER DOWNLOAD EXAMIANS APP
Machine Design The arms of the pulleys for flat belt drive have All the three characteristics Major axis twice the minor axis Elliptical cross-section Major axis in plane of rotation All the three characteristics Major axis twice the minor axis Elliptical cross-section Major axis in plane of rotation ANSWER DOWNLOAD EXAMIANS APP
Machine Design In order to withstand resistance to wear, the best profile of gear is 20° full depth involute tooth 14½° full depth involute tooth 20° involute stub tooth 14½° stub tooth 20° full depth involute tooth 14½° full depth involute tooth 20° involute stub tooth 14½° stub tooth ANSWER DOWNLOAD EXAMIANS APP
Machine Design Which of the following bearing is preferred for oscillating conditions? Taper roller bearing Angular contact single row ball bearing Needle roller bearing Double row roller bearing Taper roller bearing Angular contact single row ball bearing Needle roller bearing Double row roller bearing ANSWER DOWNLOAD EXAMIANS APP
Machine Design Belt slip may occur due to All of these Driving pulley too small Loose belt Heavy load All of these Driving pulley too small Loose belt Heavy load ANSWER DOWNLOAD EXAMIANS APP
Machine Design The shear stress at a point in a shaft subjected to a torque is Directly proportional to the applied torque and inversely proportional to the polar moment of inertia Directly proportional to the applied torque and the polar moment of inertia Inversely proportional to the applied torque and the polar moment of inertia Directly proportional to the polar moment of inertia and to the distance of the point from the axis Directly proportional to the applied torque and inversely proportional to the polar moment of inertia Directly proportional to the applied torque and the polar moment of inertia Inversely proportional to the applied torque and the polar moment of inertia Directly proportional to the polar moment of inertia and to the distance of the point from the axis ANSWER DOWNLOAD EXAMIANS APP
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