Machine Design Which of the following statement is correct regarding power screws? 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% Both (A) and (B) 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% The efficiency of a self locking screw can not be more than 50% Both (A) and (B) The efficiency of Acme (trapezoidal) thread is less than that of a square thread ANSWER DOWNLOAD EXAMIANS APP
Machine Design The groove angle of the pulley for rope drive is usually 20° 45° 60° 35° 20° 45° 60° 35° ANSWER DOWNLOAD EXAMIANS APP
Machine Design If two springs are in parallel then their overall stiffness will be Same Half None of these Double Same Half None of these Double ANSWER DOWNLOAD EXAMIANS APP
Machine Design If the centre distance of the mating gears having involute teeth is varied within limits, the velocity ratio Increases None of these Decreases Remains unchanged Increases None of these Decreases Remains unchanged ANSWER DOWNLOAD EXAMIANS APP
Machine Design In case of pressure vessels having open ends, the fluid pressure induces Shear stress Longitudinal stress None of these Circumferential stress Shear stress Longitudinal stress None of these Circumferential stress ANSWER DOWNLOAD EXAMIANS APP
Machine Design The draw of cotter need not exceed 3 mm 20 mm 5 mm 10 mm 3 mm 20 mm 5 mm 10 mm ANSWER DOWNLOAD EXAMIANS APP
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