Machine Design Which of the following statement is correct regarding power screws? 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% The efficiency of a self locking screw can not be more than 50% ANSWER DOWNLOAD EXAMIANS APP
Machine Design The material used for brake lining should have __________ coefficient of friction. High Moderate None of these Low High Moderate None of these Low ANSWER DOWNLOAD EXAMIANS APP
Machine Design A connecting rod is designed as a Long column All of these Short column Strut Long column All of these Short column Strut ANSWER DOWNLOAD EXAMIANS APP
Machine Design According to I.B.R., the efficiency of a double riveted butt joint with double cover straps of equal width should be 80 to 90% 70 to 83% 63 to 70% 45 to 60% 80 to 90% 70 to 83% 63 to 70% 45 to 60% ANSWER DOWNLOAD EXAMIANS APP
Machine Design In a butt welded joint, the size of weld is __________ the throat of weld. 2 times Equal to 0.5 times Double 2 times Equal to 0.5 times Double 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 downwards Axially upwards or downwards None of these Axially upwards Axially downwards Axially upwards or downwards None of these Axially upwards ANSWER DOWNLOAD EXAMIANS APP
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