Machine Design A screw is said to be over hauling screw, if the Efficiency of screw is 100% Friction angle is equal to helix angle Friction angle is less than helix angle Friction angle is more than helix angle Efficiency of screw is 100% Friction angle is equal to helix angle Friction angle is less than helix angle Friction angle is more than helix angle ANSWER DOWNLOAD EXAMIANS APP
Machine Design Which of the following spring is used in mechanical wrist watch? Spiral spring Belleville spring Helical compression spring Torsion spring Spiral spring Belleville spring Helical compression spring Torsion spring ANSWER DOWNLOAD EXAMIANS APP
Machine Design A shaft is subjected to a maximum bending stress of 80 N/mm² and maximum shearing stress equal to 30 N/mm² at a particular section. If the yield point in tension of the material is 280 N/mm² and the maximum shear stress theory of failure is used, then the factor of safety obtained will be 3.5 2.5 3.0 2.8 3.5 2.5 3.0 2.8 ANSWER DOWNLOAD EXAMIANS APP
Machine Design Screws used for power transmission should have High efficiency Low efficiency Very fine threads Strong teeth High efficiency Low efficiency Very fine threads Strong teeth ANSWER DOWNLOAD EXAMIANS APP
Machine Design The modulus of elasticity for mild steel is approximately equal to 110 kN/mm² 210 kN/mm² 80 kN/mm² 100 kN/mm² 110 kN/mm² 210 kN/mm² 80 kN/mm² 100 kN/mm² ANSWER DOWNLOAD EXAMIANS APP
Machine Design Which of the following statement is correct regarding power screws? 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 Acme (trapezoidal) thread is less than that of a square thread The efficiency of a self locking screw can not be more than 50% 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 Acme (trapezoidal) thread is less than that of a square thread The efficiency of a self locking screw can not be more than 50% ANSWER DOWNLOAD EXAMIANS APP