Machine Design Which of the following statement is correct regarding power screws? Both (A) and (B) 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 If the friction angle is less than the helix angle of the screw, then the efficiency will be more than 50% Both (A) and (B) 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 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 In a full journal bearing, the angle of contact of the bearing with the journal is 360° 120° 270° 180° 360° 120° 270° 180° ANSWER DOWNLOAD EXAMIANS APP
Machine Design A shaft is subjected to Bending stresses Shear stresses Combined bending and shear stresses All of these Bending stresses Shear stresses Combined bending and shear stresses All of these ANSWER DOWNLOAD EXAMIANS APP
Machine Design The efficiency of a riveted joint is equal to Ps /P Least of Pt, Ps and Pc/P Pt /P Pc /P Ps /P Least of Pt, Ps and Pc/P Pt /P Pc /P ANSWER DOWNLOAD EXAMIANS APP
Machine Design The usual proportion for the width of key is (where d = Diameter of shaft or diameter of hole in the hub) d/4 d/8 d/6 d/2 d/4 d/8 d/6 d/2 ANSWER DOWNLOAD EXAMIANS APP
Machine Design A compound cylinder with inner radius 50 mm and outer radius 70 mm is made by shrinking one cylinder on to the other cylinder, the junction radius is 60 mm and the junction pressure is 1.1 N/mm². The maximum hoop stress developed in the inner cylinder is 3.6 N/mm² tension 3.6 N/mm² compression 7.2 N/mm² compression 7.2 N/mm² tension 3.6 N/mm² tension 3.6 N/mm² compression 7.2 N/mm² compression 7.2 N/mm² tension ANSWER DOWNLOAD EXAMIANS APP
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