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% 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 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 strength of the unriveted plate (P) per pitch length is equal to (p - d) t.σt (p - d) σt p.t.σt p.d.σt (p - d) t.σt (p - d) σt p.t.σt p.d.σt ANSWER DOWNLOAD EXAMIANS APP
Machine Design When a load W is applied suddenly on a bar of cross-sectional area A, the stress induced in the bar will be W/A 3W/A W/2A 2W/A W/A 3W/A W/2A 2W/A ANSWER DOWNLOAD EXAMIANS APP
Machine Design Tensile strength of a mild steel specimen can be roughly predicted from following hardness test Rockwell Brinell None of these Vickers Rockwell Brinell None of these Vickers ANSWER DOWNLOAD EXAMIANS APP
Machine Design Spring stiffness is Its ability to absorb shocks Load required to produce unit deflection Ratio of coil diameter to wire diameter Its capability of storing energy Its ability to absorb shocks Load required to produce unit deflection Ratio of coil diameter to wire diameter Its capability of storing energy ANSWER DOWNLOAD EXAMIANS APP
Machine Design The cracks in helical springs used in railway carriages usually start on the inner side of the coil because of the fact that It has a lower curvature than the outer side It is subjected to a higher cyclic loading than the outer side It is more stretched than the outer side during the manufacturing process It is subjected to a higher stress than the outer side It has a lower curvature than the outer side It is subjected to a higher cyclic loading than the outer side It is more stretched than the outer side during the manufacturing process It is subjected to a higher stress than the outer side ANSWER DOWNLOAD EXAMIANS APP
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